LegalizeThe Export of Goods (Control) Order 1987
| IL1565 | Computers, electronic, related equipment, equipment or systems incorporating such computers, and specially designed components and accessories for such computers and related equipment, the following– | |
|---|---|---|
| 1 Analogue or digital computers and related equipment therefor, designed or modified for use in airborne vehicles, missiles or space vehicles and rated for continuous operation at temperatures from below 228 K (–45°C) to above 328 K (+55°C) | A | |
| 2 Analogue computers other than those specified in head (1) above, and related equipment therefor | A | |
| except those having neither of the following characteristics– | ||
| a capable of containing more than 20 summers, integrators, multipliers or function generators; nor | ||
| b having facilities for readily varying the interconnections of the components specified in (a) above. | ||
| 3 Digital computers other than those specified in head (1) above, and related equipment therefor, having any of the following characteristics– | ||
| a designed or modified to limit electro-magnetic radiation to levels below those acceptable for normal civil use | A | |
| b ruggedised or radiation-hardened for military use; or | A | |
| c modified for military use | A | |
| d designed or modified for certifiable multi-level security or certifiable user isolation applicable to government classified material or to applications requiring an equivalent level of security. | ||
| 4 Equipment or systems incorporating analogue or digital computers specified in heads (1) or (3) above | A | |
| 5 Hybrid computers, and related equipment therefor, having all the following characteristics– | ||
| a the analogue section as specified in head (2) above | A | |
| b the digital section having an internal fixed or alterable storage of more than 2,048 bit; and | A | |
| c incorporating facilities for processing numerical data from the analogue section in the digital section or vice versa | A | |
| 6 Digital computers, or analogue computers specified in heads (1) and (2) above, incorporating equipment for interconnecting analogue computers with digital computers | A | |
| 7 Digital computers, and related equipment therefor, other than those specified in heads (1), (3) and (6) above, whether or not embedded in, incorporated in or associated with equipment or systems, including but not limited to the following– | ||
| a digital computers and related equipment designed or modified for– | ||
| i signal processing | A | |
| ii image enhancement | A | |
| iii local area networks | A | |
| iv multi-data-stream processing | A | |
| v combined recognition, understanding and interpretation of image, continuous (connected) speech or connected word text, other than signal processing or image enhancement | A | |
| vi real time processing of sensor data– | A | |
| a concerning events occurring outside the computer using facility; and | ||
| b provided by equipment specified in the entries in Group 3F relating to navigation, direction finding, radar and airborne communication equipment; communication, detection or tracking equipment; marine or terrestrial acoustic or ultrasonic systems; or telemetering and telecontrol equipment | ||
| vii microprocessor or microcomputer development systems | A | |
| viii fault tolerance | A | |
| ix user-accessible microprogrammability | A | |
| x data (message) switching | A | |
| xi stored-programme-controlled circuit switching | A | |
| xii wide-area networks | A | |
| b digital computers and related equipment therefor having both of the following characteristics– | ||
| i size, weight, power consumption and reliability or other characteristics, such as bubble memory, allowing easy application in mobile tactical military systems; and | A | |
| ii ruggedised above the level required for a normal commercial (office) environment but not necessarily to that specified in head (3)(b) above | A | |
| except | ||
| i digital computers or related equipment therefor embedded in other equipment or systems and having all of the following characteristics– | ||
| a being designed and used for non-strategic applications; | ||
| b by nature of design or performance restricted to the particular application for which they have been designed; | ||
| c not being the principal element of the other equipment or systems in which they are embedded; | ||
| d not being embedded in equipment or systems described elsewhere in this Schedule; | ||
| e the total processing data rate of any one embedded digital computer not exceeding 43 million bit per second; | ||
| f the sum of the total processing data rate of each embedded digital computer not exceeding 100 million bit per second; and | ||
| g the embedded digital computers or related equipment therefor not including either–(i)equipment or systems specified in head (3) of the entry in Group 3F relating to communication transmission equipment or in the entry in this group relating to stored-programme-controlled communication switching equipment; or(ii)equipment specified in head (7)(a) above, other than for–(a)signal processing or image enhancement when lacking user-accessible programmability and when embedded in medical imaging equipment; or(b)local area networks implemented by using integral interfaces designed to meet ANSI/IEEE Standard 488-1978 or IEC Publication 625–1; | ||
| h not including specified related equipment other than input/output control unit-disc drive combinations having all of the following characteristics–(i)a total connected net capacity not exceeding 200 million bits(ii)a total transfer rate not exceeding 5.5 million bit per second(iii)no more than one independent drive and(iv)a total access rate not exceeding 40 accesses per second | ||
| ii digital computers or related equipment therefor incorporated in other equipment or systems and having all of the following charcteristics– | ||
| a not being the principal element of the other equipment or systems in which they are incorporated; | ||
| b not being incorporated in equipment or systems specified elsewhere in this Schedule; | ||
| c the total processing data rate of any one incorporated digital computer not exceeding 15 million bit per second; | ||
| d the total internal storage available to the user not exceeding 9.8 million bit; and | ||
| e the incorporated digital computers or related equipment therefor not including–(i)related equipment specified elsewhere in this Schedule;(ii)equipment or systems specified in head (3) of the entry in Group 3F relating to communication transmission equipment or in the entry in Group 3F relating to stored-programme-controlled communication switching equipment;(iii)equipment specified in head 7(b) above; or(iv)equipment specified in head 7(a) above, other than for–(a)signal processing or image enhancement when lacking user-accessible programmability and embedded in medical imaging equipment; or(b)local area networks implemented by using integral interfaces designed to meet ANSI/IEEE Standard 488-1978 or IEC Publication 625-1; | ||
| iii digital computers, other than those specified in heads 7(a) and 7(b) above, and related equipment in the form of complete systems and having all the following characteristics– | ||
| a shipped as complete systems; | ||
| b designed for identifiable civil use; | ||
| c not specially designed for any equipment specified elsewhere in this Schedule; | ||
| d having a total processing data rate not exceeding 6.5 million bit per second; | ||
| e having a total internal storage available to the user not exceeding 6.2 million bit; | ||
| f not incorporating any of the following–(i)a central processing unit implemented with more than two microprocessor or microcomputer microcircuits, other than any dedicated microprocessor or microcomputer microcircuit used solely for display, keyboard or input/output control, or any bit-slice microprocessor microcircuit;(ii)a microprocessor or microcomputer microcircuit with more than 16 bit word length or a bus architecture with more than 16 bit(iii)analogue-to-digital or digital-to-analogue converter microcircuits –(a)exceeding the limits specified in the entry in this Group relating to converters, analogue-to-digital and digital-to-analogue; and(b)other than for direct driven video monitors for normal public television;(iv)specified related equipment other than input/output control unit-disc drive combinations having all of the following characteristics–(a)a total transfer rate not exceeding 5.5 million bit per second;(b)a total connected net capacity not exceeding 200 million bit;(c)no more than one independent drive; and(d)a total access rate not exceeding 40 accesses per second;(v)related equipment specified elswhere in this Schedule; or(vi)equipment specified in head (3) of the entry in Group 3F relating to communication transmission equipment or in the entry in this group relating to stored-programme-controlled communication switching equipment; | ||
| iv peripheral equipment, including that containing embedded microprocessor microcircuits which lack user-accessible-programmability, the following– | ||
| a card punches and readers; | ||
| b paper tape punches and readers; | ||
| c manually operated keyboards and teletype devices; | ||
| d manually operated graphic tablets having not more than 1,024 resolvable points along any axis; | ||
| e impact printers; | ||
| f non-impact printers, other than as specified in heads (2) or (3) of the entry in this Group relating to recording or reproducing equipment, not exceeding–(i)2,000 lines (30 pages) per minute; or(ii)600 characters per second; | ||
| g plotting equipment, other than as specified in heads (2) or (3) of the entry in this Group relating to recording or reproducing equipment, producing a physical record by ink, photographic, thermal or electrostatic techniques and having–(i)a linear accuracy not better than .2660.004%; and(ii)an active plotting area of not more than 1,700 mm by 1,300 mm; | ||
| h digitising equipment generating rectilinear coordinate data by manual or semi-automatic tracing of physical records and having–(i)a linear accuracy not better than .2660.004%; and(ii)an active digitising area of not more than 1,700 mm by 1,300 mm; | ||
| i optical mark recognition (OMR) equipment; | ||
| j optical character recognition (OCR) equipment which–(i)does not contain signal processing or image enhancement equipment; and(ii)is only for–(a)stylised OCR characters;(b)other internationally standardised stylised character fonts; or(c)other characters limited to non-stylised or hand-printed numerics and up to 10 hand-printed alphabetic or other characters; | ||
| k cathode-ray tube displays for which circuitry and character-generation devices, external to the tube, limit the capabilities to–(i)alpha-numeric characters in fixed formats;(ii)graphs composed only of the same basic elements as used for alpha-numeric character composition; or(iii)graphic displays for which the sequence of symbols and basic elements of symbols are fixed; | ||
| l cathode-ray tube graphic displays, other than those containing tubes specified in the entry in Group 3F relating to electronic cathode-ray tubes, limited as follows–(i)the maximum bit transfer rate from the electronic computer to the display not exceeding 9,600 bit per second, other than direct driven video monitors;(ii)not more than 1,024 resolvable elements along any axis; and(iii)not more than 16 shades of grey or colour; | ||
| m cathode-ray tube graphic displays, other than those containing tubes specified in the entry in Group 3F relating to electronic cathode-ray tubes, provided that they are–(i)part of industrial or medical equipment; and(ii)not specially designed for use with electronic computers; | ||
| n graphic displays specially designed for signature or security checking having an active display area not exceeding 150 sq cm; | ||
| o other displays, provided that–(i)circuitry and character-generation devices external to the display device (for example, panel or tube), and the construction of this display device limit its capabilities to–(a)alpha-numeric characters in fixed formats;(b)graphs composed only of the same basic elements as used for alpha-numeric character composition; or(c)graphic displays for which the sequence of symbols and basic elements of symbols are fixed; and(ii)the displays are limited to–(a)a capability for displaying no more than 3 levels (off, intermediate and full on);(b)a minimum character height of not less than 5.5 mm if the area is 1,200 sq cm or less, or not less than 20 mm if the area is more than 1,200 sq cm; and(c)not having circuitry or non-mechanical character-generation devices as an integral part of the display device; | ||
| p light gun devices or other manual graphic input devices which are–(i)part of displays not specified elsewhere in this Group; and(ii)limited to 1,024 resolvable elements along any axis; | ||
| q disc drives for non-rigid magnetic media (floppy discs) which do not exceed–(i)a gross capacity of 17 million bit;(ii)a maximum bit transfer rate of 0.52 milion bits per second;(iii)an access rate of 12 accesses per second; | ||
| r cassette/cartridge tape drives or magnetic tape drives which do not exceed–(i)a maximum bit packing density of 131 bit per mm (3300 bit per inch) per track;(ii)a maximum bit transfer rate of 2.66 million bit per second; or | ||
| v input/output interface or control units including those containing embedded microprocessor microcircuits which lack user-accessible programmability, the following– | ||
| a those designed for use with peripheral equipment specified in exception (iv) of this head; or | ||
| b those designed for use with digital recording equipment specially designed to use magnetic card, tag, label or bank cheque recording media, specified in head (l)(b) of the entry in this Group relating to recording or reproducing equipment. | ||
| (For technology relating to this entry, see the entry in Group 4 relating thereto.) In this entry– | ||
| “access rate” of a seek mechanism means the reciprocal of the average access time of the seek mechanism, “average access time” of a seek mechanism means the sum of the average seek time and the latency time, “average seek time” means the sum of the maximum seek time and twice the minimum seek time, “maximum seek time” is for fixed head devices zero or for moving head or moving media devices the rated time to move between the two most widely separated tracks, “minimum seek time” is for fixed head devices zero or for moving head or moving media devices the rated time to move from one track to an adjacent track, and “latency time” means the rotational period divided by twice the number of independent read/write heads per track; “analogue computer” means equipment which can in the form of one or more continuous variables, accept process and output data; “associated” with equipment or systems means not feasibly capable either of being removed from such equipment or systems or of being used for other purposes, and not essential to the operation of such equipment or systems; “communication channel” means the transmission path or circuit including the terminating transmission or receiving equipment (modems) for transferring digital information between distant locations; “data device” means equipment capable of transmitting or receiving sequences of digital information; “data (message) switching” means the technique, including but not limited to store-and-forward or packet switching, for: | ||
| a accepting data groups (including messages, packages, or other digital or telegraphic information groups which are transmitted as a composite whole); | ||
| b storing (buffering) data groups as necessary; | ||
| c processing part or all of the data groups, as necessary, for the purpose of control (routing, priority, formatting, code conversion, error control, retransmission or journaling), transmission or multiplexing; and | ||
| d retransmitting (processed) data groups when transmission or receiving facilities are available; | ||
| “digital computer” means equipment which can, in the form of one or more continuous variables, accept data, store data or instructions in fixed or alterable storage devices, process data by means of a stored sequence of instructions which is modifiable and provide output of data; | ||
| “embedded” in equipment or systems means not feasibly capable either of being removed from such equipment or systems or of being used for other purposes; | ||
| “fault tolerance” means the capability to perform correctly without human intervention after failure of any assembly, so that there is no single point in the system the failure of which could cause catastrophic failure of the system’s functioning; and “assembly” means a number of components (circuit elements, discrete components, microcircuits) connected together to perform a specific function or functions, replaceable as an entity (and normally capable of being disassembled); | ||
| “hybrid computer” means equipment which can accept data, process data in both analogue and digital representations and provide output of data; | ||
| “image digitiser” means a device for directly converting analogue representation of an image into a digital representation; | ||
| “image enhancement” means the processing of externally derived information-bearing images by algorithms such as time-compression, filtering, extraction, selection, correlation, convolution or transformations between domains, excluding algorithms using only linear or rotational transformation of a single image, such as translation, feature extraction, registration or false coloration; | ||
| “incorporated” in equipment or systems means feasibly capable either of being removed from such equipment or systems or of being used for other purposes, but is essential to the operation of such equipment or systems; | ||
| “local area network” means a data communication system which allows an arbitrary number of independent data devices to communicate directly with each other and is confined to a geographical area of moderate size; | ||
| “main storage” means the primary storage for data or instructions for rapid access by a central processing unit. It consists of the internal storage of a digital computer and any hierarchical extension thereto, such as cache storage or non-sequentially accessed extended storage; | ||
| “maximum bit packing density” means the density of recording specified in accordance with the appropriate ANSI or ISO Standard (e.g. ANSI X3.14–1979, ISO 1862–1975; ANSI X3.22–1973, ISO 1873–1876; ANSI X3.39–1973, ISO 3788–1976; ANSI X3.48–1977, ISO 3407–1976; ANSI X3.56–1977, ISO 4057–1979; ANSI X3.54–1976); | ||
| “maximum bit transfer rate”– | ||
| a of a drum or disc drive is the product of the maximum number of binary digit (bit) positions per unformatted track and the number of tracks which simultaneously can be read or written, divided by the rotational period; | ||
| b of a magnetic tape drive is the product of the “maximum bit packing density”, the number of data bits per character (ANSI) or per row (ISO), and the maximum tape read/write speed; | ||
| “microprogramme” means a sequence of elementary instructions maintained in a special storage, the execution of which is initiated by the introduction of its reference instructions into an instruction register; | ||
| “most immediate storage” means the portion of the main storage most directly accessible by the central processing unit. For single level main storage, this is the internal storage, and for hierarchical “main storage”, this is the cache storage; the instruction stack; or the data stack; | ||
| “multi-data-steam processing” means the microprogramme or equipment architecture technique which permits processing two or more data sequences under the control of one or more instruction sequences by means such as parallel processing; or structured arrays of processing elements; | ||
| “net capacity” of a drum, disc or cartridge type streamer tape drive, or a bubble memory is the total capacity designed to be accessible to the digital computer excluding error control bits; | ||
| “non-volatile storage” means a storage device the contents of which are not lost when power is removed; | ||
| “principal element” means a digital computer or related equipment which is either embedded or incorporated in another equipment or system and which in replacement value is more than 35% of the replacement value of the total equipment or system (including the digital computer or related equipment); | ||
| “programme” means a sequence of instructions to carry out a process in, or convertible into, a form executable by an electronic computer; | ||
| “real time processing” means a processing of data by an electronic computer in response to an external event according to time requirements imposed by the external event; | ||
| “related equipment” means the following equipment embedded in, incorporated in or associated with electronic computers – equipment for interconnecting analogue computers with digital computers or for interconnecting digital computers, equipment for interfacing electronic computers to local area networks or to wide area networks, communication control units and other input/output control units, recording or reproducing equipment relating to this entry described in the entry in this group relating to such equipment, displays or other peripheral equipment; | ||
| “signal processing” means the processing of externally derived information-bearing signals by algorithms such as time compression, filtering, extraction, selection, correlation, convolution or transformations between domains (such as Fast Fourier Transform or Walsh Transform); | ||
| “software” means a collection of one or more programmes or microprogrammes fixed in any tangible medium of expression; | ||
| “terminal device” means a data device which does not include process control sensing and actuating devices; and which is capable of accepting or producing a physical record, accepting a manual input, or producing a visual output. Normal groupings of such equipment (such as a combination of paper tape punch/reader and printer), connected to a single data channel or communication channel, are considered as a single terminal device; | ||
| “total internal storage available to the user” means the sum of the individual capacities of all internal user-alterable or user-replacement storage devices which may be included in the equipment at the same time and used to store software instructions or data; | ||
| “total processing data rate”– | ||
| a of a single central processing unit, is its processing data rate; | ||
| b of multiple central processing units which do not share direct access to a common main storage, is the individual processing data rate of each central processing unit, that is each unit is separately treated as a single central processing unit as in (a) above;or | ||
| c of multiple central processing units, which partially or fully share direct access to a common main storage at any level, is the sum of the highest of the individual processing data rates of all central processing units; and 0.75 times the processing data rate of each remaining central processing unit, sharing the same main storage assuming the configuration of equipment, which would maximize this sum of rates; | ||
| “processing data rate” is the maximum of either: the “floating point processing data rate” (Rf), or the “fixed point processing data rate” (Rx). | ||
| It should be noted that the “processing data rate” of a central processing unit implemented with two or more microprocessor microcircuits, not including any dedicated microprocessor microcircuit used solely for display, keyboard or input/output control, is the sum of the individual “processing data rates” of all these microprocessor microcircuits; | ||
| “floating point processing data rate” (Rf) is the sum of: | ||
| 1 0.85 times the number of bits in a fixed point instruction (nix) or 0.85 times the number of bits in a floating point instruction (nif), if no fixed point instructions are implemented; | ||
| 2 0.15 times the number of bits in a floating point instruction (nif); | ||
| 3 0.40 times the number of bits in a fixed point operand (nox) or 0.40 times the number of bits in a floating point operand (nof), if no fixed point instructions are implemented; and | ||
| 4 0.15 times the number of bits in a floating point operand (nof); | ||
| divided by the sum of | ||
| 1 0.85 times the execution time for a fixed point addition (tax) or for a floating point addition (taf), if no fixed point instructions are implemented; | ||
| 2 0.09 times the execution time for a floating point addition (taf); and | ||
| 3 0.06 times the execution time for a floating point multiplication (tmf) or for the fastest available subroutine (tmsub) to simulate a floating point multiplication instruction, if no floating point multiplication instructions are implemented. | ||
| Thus– | ||
| $Rf=(0.85)nix+(0.15)nif+(0.40)nox+(0.15)nof(0.85)tax+(0.09)taf+(0.06)tmf$ | ||
| or if no fixed point instructions are implemented: | ||
| $Rf=(1.00)nif+(0.55)nof(0.94)taf+(0.06)tmf$ | ||
| or, if no floating point multiplication instructions are implemented (tmf = tmsub): | ||
| $Rf=(0.85)nix+(0.15)nimf+(0.40)nox+(0.15)nof(0.85)tax+(0.09)taf+(0.06)tmsub$ | ||
| If a “digital computer” has neither floating point addition nor floating point multiplication instructions, then its floating point processing data rate is equal to zero. | ||
| “fixed point processing data rate” (Rx) is the sum of: | ||
| 1 0.85 times the number of bits in a fixed point addition instruction (niax); | ||
| 2 0.15 times the number of bits in a fixed point multiplication instruction (nimx); and | ||
| 3 0.55 times the number of bits in a fixed point operand (nox); | ||
| divided by the sum of: | ||
| 1 0.85 times the execution time for a fixed point addition (tax); and | ||
| 2 0.15 times the execution time for a fixed point multiplication (tmx) or for the fastest available subroutine (tmsub) to simulate a fixed point multiplication instruction if no fixed point multiplication instructions are implemented. | ||
| Thus: | ||
| $Rx=(0.85)niax+(0.15)nimx+(0.55)nox(0.85)tax+(0.15)tmx$ | ||
| or If no fixed point multiplication instructions are implemented (tmxequals; tmsub): | ||
| $Rx=(0.85)niax+(0.15)nimx+(0.55)nox(0.85)tax+(0.15)tmsub$ | ||
| If a “digital computer” has neither fixed point addition nor fixed point multiplication instructions, then its fixed point processing data rate is equal to zero. | ||
| “number of bits in a fixed point addition instruction (niax), fixed point multiplication instruction (nimx), floating point addition instruction (niaf), or floating point multiplication instruction (nimf) is the appropriate shortest single fixed or floating point instruction length which permits full direct addressing of the main storage. It should be noted that when multiple instructions are required to simulate an appropriate single instruction, the number of bits in the above instructions is defined as 16 bit plus the number of bits (biax, bimx, biaf, bimf) which permits full direct addressing of the main storage;” | ||
| “number of bits in a fixed point operand” (nox) is the shortest fixed point operand length, or 16 bit, whichever is greater. | ||
| “number of bits in a floating point operand” (no) is the shortest floating point operand length or 30 bit, whichever is greater. If the addressing capability of an instruction is expanded by using a base register, then the number of bits in an instruction, fixed or floating point, addition or multiplication is the number of bits in the instruction with the standard address length including the number of bits necessary to use the base register. | ||
| “execution time” is | ||
| a the time certified or published by the manufacturer for the execution of the fastest appropriate instruction, under the following conditions– | ||
| 1 no indexing or indirect operations are included; | ||
| 2 the instruction is in the most immediate storage; | ||
| 3 one operand is in the accumulator or in a location of the most immediate storage, which is acting as the accumulator; | ||
| 4 the second operand is in the most immediate storage; and | ||
| 5 the result is left in the accumulator or the same location in the most immediate storage, which is acting as the accumulator; | ||
| b if only the maximum and minimum execution times of the instructions are published, the sum of: | ||
| the maximum execution time of an instruction (tmax), and twice the minimum execution time of this instruction (tmin); divided by three. | ||
| Thus: $t=tmax+2×tmin3$ (t stands for any of the values tax, taf, tmx or tmf); | ||
| c for central processing units which simultaneously fetch more than one instruction from one storage location, the average of the execution times when executing instructions fetched from all possible locations within the stored word. If the longest fixed point operand length is smaller than 16 bit, execution time is taken as the time required for the fastest available subroutine to simulate a 16 bit fixed point operation. If the addressing capability of an instruction is expanded by using a base register, then the execution time includes the time for adding the content of the base register to the address part of the instruction; | ||
| “total transfer rate”– | ||
| a of the input/output control unit – drum, disc or cartridge-type streamer tape drive combinations (Rtdtot) means the sum of the individual “transfer rates” of all input/output control unit – drum, disc or cartridge-type streamer tape drive combinations (Rtd) provided with the system which can be sustained simultaneously assuming the configuration of equipment which would maximise this sum of rates. Thus: | ||
| $Rtdot=SUMRtd;$ | ||
| “transfer rate”– | ||
| i of an input/output control unit – drum or disc drive combination (Rtd), is the smaller of either the input/output control unit transfer rate (Rtc), or the sum of the individual transfer rates of all independent seek mechanisms (Rts).Thus: | ||
| $Rtd=min(Rtc; SUMRts)$ | ||
| ii of an input/output control unit – cartridge-type streamer tape drive combination (Rtc) is | ||
| a with rotational position sensing (rps), the product of the number of independent read/write channels (C) and the greatest “maximum bit transfer rate” (Rtsmaxmax) of all independent seek mechanisms; or | ||
| b without rotational position sensing (rps), two-thirds of this product. Thus: | ||
| $Rtc=C×Rtsmaxmax (with rps);$ or $Rtc=23×C×Rtsmaxmax (without rps)$ of an independent seek mechanism (Rts) is the product of: the maximum bit transfer rate (Rtsmax), and the rotational period (tr); divided by the sum of: the rotational period (tr), the minimum seek time (tsmin); and the latency time (t₁).Thus: $Rts=Rtsmax×trtr+tsmin+t1$ | ||
| b of the input/output control unit – magnetic tape drive combinations (Rtttot) is the sum of the individual transfer rates of all input/output control unit – magnetic tape drive combinations (Rtt) provided with the system which can be sustained simultaneously assuming the configuration of equipment which would maximise this sum of rates. Thus: $Rtttot=SUMRttt$ “transfer rate” of an input/output control unit – cartridge-type streamer or magnetic tape drive combination (Rtt) is the product of the number of independent read/write channels (C) the and greatest maximum bit transfer rate (Rttmaxmax) of all tape drives. Thus: $Rtt=C×Rttmaxmax$ c of the input/output or communication control unit – directly connected data channel combinations, is the sum of the individual transfer rates of all data channels provided with the system which can be sustained simultaneously assuming the configuration of equipment which would maximise this sum of rates; | ||
| “transfer rate of any data channel” means the sum of the individual bit transfer rates of all the other peripheral devices, excluding terminal devices, which can be sustained simultaneously on the data channel; | ||
| “user-accessible microprogrammability” means the facility allowing a user to insert, modify or replace microprogrammes; | ||
| “user-accessible programmability” means the facility allowing a user to insert, modify or replace a programme by means other than a physical change in wiring or interconnections or the setting of function controls including entry of parameters; and | ||
| “virtual storage” means the storage space that may be regarded as addressable main storage by the user of a computer system in which virtual addresses are mapped into real addresses. (The size of virtual storage is limited by the addressing scheme of the computer system and not by the actual number of main storage locations.) | ||
| “wide area network” means a data communciation system which allows an arbitrary number of independent data devices to communicate with each other; may include local area networks; and is designed to interconnect graphically dispersed facilities. | ||
| IL1566 | Software, the following– | |
| 1 Software of any category, the following– | ||
| a software designed or modified for any computer that is part of a computer series designed and produced in any country specified in Article 2(iv) of this Order | A | |
| except application software designed for and limited to– | ||
| i accounting, general ledger, inventory control, payroll, accounts receivable, personnel records, wages calculation or invoice control; | ||
| ii data and text manipulation including sort/merge, text editing, data entry or word processing; | ||
| iii data retrieval from established data files for purposes of report generation or inquiry for the functions specified in sub-heads (a)(i) or (a)(ii) above; or | ||
| iv the non real time processing of pollution sensor data at fixed sites or in civil vehicles for civil environmental monitoring purposes. | ||
| b software designed or modified for the design, development or production of goods specified, other than as exceptions, elsewhere in this Schedule | A | |
| c software designed or modified for: | ||
| i hybrid computers specified in the entry in this group relating to computers | A | |
| ii one or more of the functions described in sub-head 7(a) excepting (x) and (xi) of the entry in this group relating to computers or for digital computers or related equipment designed or modified for such functions | A | |
| except the minimum specially designed software in machine-executable form for digital computers and related equipment therefor specified as exceptions in sub-heads (a) and (b) under head (7) of the entry in this group relating to computers when supplied with the equipment or systems. | ||
| d software for computer-aided design, manufacture, inspection or test of goods specified, other than as exceptions, elsewhere in this Schedule | A | |
| e software designed or modified to provide certifiable multi-level security or certifiable user-isolation applicable to government-classified material or to applications requiring an equivalent level of security, or software to certify such software | A | |
| 2 Categorised software, the following– | ||
| a development systems– | ||
| i those employing high-level language and designed for or containing programmes or data bases special to the development or production of– | ||
| a specially designed software specified, other than as an exception, elsewhere in this Schedule | A | |
| b software specified in sub-heads (1)(b) or (1)(c), of this entry, including any subset designed or modified for use as part of such a development system | A | |
| ii those employing high-level language designed for or containing the software tools and data bases for the development or production of software, such as, or equivalent to, an Ada Programming Support Environment (APSE) or any subset, superset or derivative of APSE, including any subset of such a development system | A | |
| b programming systems– | ||
| i cross-hosted compilers and cross-hosted assemblers | A | |
| Note:For “cross-hosted” compilers or “cross-hosted” assemblers which have to be used in conjunction with microprocessor or microcomputer development instruments or systems described in IL1529, see that head. | ||
| ii compilers or interpreters designed or modified for use as part of a development system specified in sub-head (2)(a) above | A | |
| iii dissassemblers, decompilers or other software which convert programmes in object or assembly language into a higher level language | A | |
| except simple debugging applications software, such as mapping, tracing, check-point/restart, breakpoint, dumping and the display of the storage contents or their assembly language equivalent. | ||
| c diagnostic systems or maintence systems designed or modified for use as part of a development system specified in sub-head (2)(a) aboveA | ||
| d operating systems– | ||
| i those designed or modified specially for digital computers or related equipment exceeding any of the following limits–A | ||
| a central processing unit – main storage combinations –(i)total processing data rate of 48 million bit per second;(ii)total connected capacity of main storage of 25.2 million bit; and(iii)virtual storage capability of 512 M Byte; | ||
| b input/output control unit – drum, disc or cartridge-type streamer tape drive combinations–(i)total transfer rate of 15 million bit per second;(ii)total access rate of 320 accesses per second;(iii)total connected net capacity of 7,000 million bit; and(iv)maximum bit transfer rate of any drum or disc drive of 10.3 million bit per second; | ||
| c input/output control unit – bubble memory combinations – total conected net capacity of 2.1 million bit; | ||
| d input/output control unit – magnetic tape drive combinations – i “total transfer rate” of 5.2 million bit per second; ii twelve magnetic tape drives; iii maximum bit transfer rate of any magnetic tape drive of 2.6 million bit per second; iv maximum bit packing density of 63 bit per mm (1600 bit per inch) per track; and v maximum tape read/write speed of 508 cm (200 inch) per second | ||
| ii those providing on-line transaction data processing which permits integrated teleprocessing and on-line updating of data basesA | ||
| e application software– | ||
| i software for cryptologic or cryptanalytic applicationsA | ||
| ii artificial intelligence software, including software normally classified as expert systems enabling a digital computer to perform functions normally associated with human perception and reasoning or learningA | ||
| iii data base management systems which are designed to handle distributed data bases for– | ||
| a fault tolerance by using techniques such as maintenance of duplicated data bases, or | ||
| b integrating data at a single site from independent remote data basesA | ||
| iv software designed to adapt software resident on one digital computer for use on another digital computer both being of a type specified in the entry in this group relating to computersA | ||
| (For technology relating to this entry, see the entry in Group 4 relating thereto.) | ||
| In this entry – | ||
| “cross-hosted” refers to programming systems which produce programmes for a model of electronic computer different from that used to run the programming system, having code generators for equipment different from the host computer; | ||
| “development system” means software to develop or produce software. This includes software to manage those activities. Examples of a development system are programming support environments, software development environments, and programmer productivity aids; | ||
| “programming system” means software to convert a convenient expression of one or more processes (source code or source language) into equipment executable form (object code or object language); | ||
| “diagnostic system” means software to isolate or detect software or equipment malfunctions; | ||
| “maintenance system” means software to modify software or its associated documentation in order to correct faults, or for other updating purposes, or to maintain equipment; | ||
| “operating system” means software to control the operation of a digital computer or of related equipment, or the loading or execution of programmes; | ||
| “application software” means software other than a development system, programming system, diagnostic system, maintenance system or operating system; | ||
| “specially designed software” is defined as the minimum operating systems, diagnostic systems, maintenance systems and application software necessary to be executed on a particular equipment to perform the function for which it was designed. For other incompatible equipment to perform the same function requires modification of this software or addition of programmes. | ||
| “database management system” means application software to manage and maintain a database in one or more prescribed logical structures for use by other application software independent of the specific methods used to store or retrieve the database; | ||
| “distributed database” means a database which is physically located and maintained in part or as a whole in two or more interconnected electronic computers or related equipment, so that inquiries from one location can involve database access in other interconnected electronic computers or related equipment; | ||
| “high-level language” means a programming language that does not reflect the structure of any one given electronic computer or class of electronic computers; | ||
| “on-line updating” means processing in which the contents of a database can be amended within a period of time useful to interact with an external request. | ||
| IL1567 | Stored-programme-controlled communication switching equipment or systems, specially designed components therefor and specially designed software for the use of such equipment or systems, the following– | |
| 1 Communication equipment or systems for data (message) switching, including those for local area network or for wide area network | A | |
| 2 Communication equipment or systems for stored-programme-controlled circuit switching | A | |
| except | ||
| a key telephone systems which– | ||
| i do not provide direct dial access to a group of shared exchange lines or trunk circuits; | ||
| ii are not designed to be upgraded to private automatic branch exchanges (PABXs); | ||
| iii the software supplied | ||
| a is limited to the minimum specially designed software necessary for the installation, operation and maintenance of the equipment or systems and to machine-executable form; and | ||
| b does not include software specified in the entry in this group relating to cryptographic equipment, in sub-head (1)(e) of the entry in this group relating to software or in the entry in Group 1 relating to electronic equipment specially designed for military use, or software to permit modification of generic software or its associated documentation by the user; | ||
| b stored-programme-controlled telegraph circuit switching equipment or systems which– | ||
| i are designed for civil use; and | ||
| ii provide only the services defined in CCITT Recommendations F.60 to 79, whereby telegraph subscribers can communicate directly and temporarily between themselves using start-stop telegraph equipment operating– | ||
| a at 300 baud or less; and | ||
| b with the international telegraph alphabets no 2 or 5; | ||
| iii the software supplied– | ||
| a is limited to the minimum specially designed software necessary for the installation, operation and maintenance of the equipment or systems and to machine-executable form; and | ||
| b does not include software specified in the entry in this group relating to cryptographic equipment, in sub-head (1)(e) of the entry in this group relating to software or in the entry in Group 1 relating to electronic equipment specially designed for military use, or software to permit modification of generic software or its associated documentation by the user; or | ||
| c stored-programme-controlled telephone circuit switching equipment or systems, provided that– | ||
| i the equipment or systems are designed for fixed civil use as space division analogue exchanges or time division analogue exchanges, being private automatic branch exchanges (PABXs); | ||
| ii the equipment or systems do not contain digital computers or related equipment specified in heads (1) and (3), sub-heads (a)(i) to (a)(x) (inclusive) or (a)(xii) of head (7) or sub-head (b) of head (7) of the entry in this group relating to computers; | ||
| iii communication channels or terminal devices used for administrative and control purposes are fully dedicated to these purposes and do not exceed a total data signalling rate of 9,600 bit per second; | ||
| iv voice channels are limited to 3,100 Hz as defined in CCITT Recommendation G.151; | ||
| v the PABXs do not have trunk circuit-to-subscriber line ratios exceeding 35% for PABXs with less than 100 subscriber lines or 20% for PABXs with 100 or more subscriber lines; | ||
| vi the PABXs do not have the following features– | ||
| a multi-level call pre-emption, including overriding or seizing of busy subscriber lines, trunk circuits or switches; or | ||
| b common channel signalling; | ||
| vii the software supplied– | ||
| a is limited to the minimum specially designed software necessary for the installation, operation and maintenance of the equipment or systems and to machine-executable form; and | ||
| b does not include software specified in the entry in this group relating to cryptographic equipment, in sub-head (1)(e) of the entry in Group 3G relating to software or in the entry in Group 1 relating to electronic equipment specially designed for military use, or software to permit modification of generic software or its associated documentation by the user. | ||
| In this entry– | ||
| “stored-programme-controlled circuit switching” is the technique for establishing, on demand and until released, a direct (space-division switching) or logical (time-division switching) connection betweens circuits based on switching control information derived from any source or circuit and processed according to the stored programme by one or more electronic computers; | ||
| “local area network” means a data communication system which allows an arbitrary number of independent data devices to communicate directly with each other and is confined to a geographical area of moderate size, such as an office building, plant, campus or warehouse; and | ||
| “wide area network” means a data communication system which allows an arbitrary number of data devices to communicate with each other and is designed to interconnect geographically dispersed facilities. It may include local networks. | ||
| (For technology relating to this entry, see the entry in Group 4 relating thereto.) | ||
| IL1568 | Amplifiers, electronic or magnetic, specially designed for use with resolvers, the following– | |
| 1 Isolation types having a variation of gain constant (linearity of gain) of 0.2% or better | A | |
| 2 Summing types having a variation of gain constant (linearity of gain) or an accuracy of summation of 0.2% or better | A | |
| 3 Types employing solid state Hall effect | A | |
| 4 Types designed to operate below –55°C or above +125°C | A | |
| 5 Specially designed components and test equipment (including adapters and couplers) for the equipment specified in heads (1) to (4) above (inclusive) | A | |
| Converters, analogue-to-digital and digital-to-analogue, other than digital voltage measuring apparatus specified in Group 3F, the following– | ||
| 1 Electrical-input type analogue-to-digital converters having any of the following characteristics– | ||
| a a conversion rate of more than 200,000 complete conversions per second at rated accuracy; | A | |
| b an accuracy in excess of 1 part in more than 10,000 of full scale over the specified operating temperature range; or | A | |
| c a figure of merit of 10u28 or more (derived from the number of complete conversions per second divided by the accuracy) | A | |
| 2 Electrical-input type digital-to-analogue converters having any of the following characteristics– | ||
| a a maximum settling time of less than 3 microseconds for voltage output devices and of less than 250 nanoseconds for current output devices; | A | |
| b an accuracy in excess of 1 part in more than 10,000 of full scale over the specified operating temperature range; or | A | |
| c a figure of merit of more than 2 × 10u29 for voltage output converters or 1 × 10u21u20 for current output converters | A | |
| In this head “settling time” means the time required for the output to come within one half bit of the final value when switching between any two levels of the converters and the “figure of merit” is the reciprocal of the product of the maximum settling time in seconds and the accuracy. | ||
| 3 Solid state synchro-to-digital and digital-to-synchro converters and resolver-to-digital or digital-to-resolver converters (including multi-pole resolvers), having a resolution of better than .266 1 part in 5,000 per full synchro revolution for single speed synchro systems or better than .266 1 part in 40,000 for dual speed systems | A | |
| 4 Mechanical input types, including shaft-position encoders and linear displacement encoders but excluding complex servo-follower systems, the following– | ||
| a rotary types having an accuracy of better than .266 1 part in 40,000 of full scale | A | |
| b linear displacement types having a resolution of better than .266 5 micrometres | A | |
| 5 Types designed to operate below –55°C or above +125°C | A | |
| 6 Specially designed components and test equipment (including adaptors and couplers) for the equipment specified in heads (1) to (5) above (inclusive) | A | |
| IL1568 | Electro-optical devices designed to monitor relative rotation of remote surfaces; and specially designed components and test equipment (including adaptors and couplers) for such equipment | A |
| IL1568 | Induction potentiometers (including function generators and linear synchros), linear and non-linear, having any of the following characteristics– | |
| 1 A rated conformity of 0.25% or less, or of 13 minutes of arc or less– | A | |
| 2 Types employing solid state Hall effect– | A | |
| 3 Types designed for gimbal mounting; or | A | |
| 4 Types designed to operate below –55°C or above +125°C– | A | |
| and specially designed components and test equipment (including adaptors and couplers) for the equipment specified in heads (1) to (4) above (inclusive) | A | |
| IL1568 | Induction rate (tachometer) generators, synchronous and asynchronous, with a housing diameter of 50.8 mm and smaller and a length (without shaft-ends) of 101.6 mm or less or with a diameter-to-length ratio greater than 2:1, having any of the following characteristics– | |
| 1 with a rated linearity of 0.1% or less | A | |
| 2 being temperature compensated or temperature corrected types | A | |
| 3 designed to operate below –55°C or above +125°C | A | |
| and specially designed components and test equipment (including adaptors and couplers) therefor | A | |
| IL1568 | Potentiometers, having a rated conformity better than 0.25% for a linear potentiometer or 1% for a non-linear potentiometer, the following– | |
| 1 Linear potentiometers having a constant resolution and a rated linearity of better than 0.05% absolute | A | |
| 2 Non-linear potentiometers having a variable resolution and a rated conformity of– | ||
| a 1% or less when the resolution is inferior to that obtained with a linear potentiometer of the same type and of the same track length; or | A | |
| b 0.5% or less when the resolution is better than or equal to that obtained with a linear potentiometer of the same type and of the same track length | A | |
| 3 Types designed for gimbal mounting | A | |
| 4 Types designed to operate below –55°C or above +125°C | A | |
| 5 Specially designed components and test equipment (including adaptors and couplers) for the equipment specified in heads (1) to (4) above (inclusive) | A | |
| IL1568 | Semi-conductor Hall field probes and specially designed components and test equipment (including adaptors and couplers) therefor, the following– | |
| 1 Types made of indium arsenide-phosphide | A | |
| 2 Types coated with ceramic or ferritic materials (including tangential field probes, multipliers, modulators and recorder probes) | A | |
| 3 Types with an open circuit sensitivity greater than $0.12VoltAmpere×Kilogauss$ | A | |
| In this entry “open circuit sensitivity” is calculated by dividing the open circuit Hall voltage by the product of the control current in A and the nominal value of the control field. | ||
| IL1568 | Servo-motors (gear-head or plain) the following– | |
| 1 Types designed to operate from power sources of more than 300 Hz, except those designed to operate from power sources of over 300 Hz up to but not exceeding 400 Hz with a temperature range of from –55°C to +125°C | A | |
| 2 Types designed to have a torque-to-inertia ratio of 50,000 radians per second or greater | A | |
| 3 Types incorporating special featues to secure internal damping | A | |
| 4 Types designed to operate below –55°C or above +125°C | A | |
| 5 Specially designed components and test equipment (including adaptors and couplers) for the equipment specified in heads (1) to (4) above (inclusive) | A | |
| IL1568 | Synchros, resolvers, microsyns, synchro-tels and inductosyns, having any of the following characteristics– | |
| 1 A rated electrical error of 7 minutes of arc or less or of 0.2% or less of maximum output voltage | A | |
| 2 A rated dynamic accuracy for receiver types of 1° or less, except that for units of size 30 (76.2 mm in diameter) or larger, a rated dynamic accuracy of less than 1° | A | |
| 3 Multi-speed from single shaft types | A | |
| 4 Types designed for gimbal mounting | A | |
| or | ||
| 5 Types designed to operate below –55°C or above +125°C; | A | |
| and specially designed components and test equipment (including adaptors and couplers) for the equipment specified in heads (1) to (5) above (inclusive) | A | |
| IL1568 | Synchronous motors, the following– | |
| 1 Types not exceeding size 20 (50.8 mm in diameter) having synchronous speeds in excess of 3,600 r.p.m. | A | |
| 2 Types designed to operate from power sources of more than 400 Hz | A | |
| 3 Types designed to operate below –55°C or above +125°C | A | |
| 4 Specially designed components and test equipment (including adaptors and couplers) for the equipment specified in heads (1) to (3) above (inclusive) | A | |
| IL1568 | Torquers, direct current and alternating current (torque motors specially designed for gyros and stabilised platforms); and specialised components and test equipment (including adaptors and couplers) for such equipment | A |
| IL1570 | Thermoelectric materials and devices, the following– | |
| 1 Thermoelectric materials with a maximum product of the figure of merit (Z) and the temperature (T in degrees K) in excess of 0.75 | A | |
| 2 Junctions and combinations of junctions using any of the materials specified in head (1) above | A | |
| 3 Heat absorbing or electric power generating devices incorporating any of the junctions specified in head (2) above | A | |
| 4 Other power generating devices which generate in excess of 22 W per kg or of 17.7 kW per cubic metre of the devices' basic thermoelectric components | A | |
| 5 Specially designed components for the equipment specified in heads (3) and (4) above (inclusive) | A | |
| In this entry– | ||
| “the figure of merit (Z)” equals Seebeck coefficient squared divided by the product of electrical resistivity and thermal conductivity; and | ||
| the weight and cubic measurement in head (4) are not intended to encompass the complete device but to include only the thermoelectric elements and assembly and the components for pumping calories. | ||
| IL1571 | Magnetometers, magnetometer systems and related equipment, the following– | |
| 1 Magnetometers and magnetometer systems having or capable of having a sensitivity better than .266 1 gamma (.266 10u2–u25 oersteds),A | ||
| except magnetometers having sensitivities not better than .266 0.1 gamma (.266 10u2–u26 oersteds) where the reading rate capability is not faster than once per half-second. | ||
| 2 Magnetometer test facilities able to control magnetic field values to an accuracy of 1 gamma (.266 10u2–u25 oersteds) or lessA | ||
| 3 Magnetic compensation systems using digital computers, non-magnetic platforms and calibration systemsA | ||
| 4 Specially designed components for the equipment specified in heads (1) to (3) above (inclusive)A | ||
| In this entry “sensitivity” is defined as the visually recognised minimum sinusoidal signal in the frequency range of 0.025 Hz to 1.5 Hz when signal-to-noise ratio is higher than 1. | ||
| IL1572 | Recording or reproducing equipment and recording media and specially designed components therefor, the following– | |
| 1 Recording or reproducing equipment using magnetic techniques,A | ||
| except | ||
| a equipment specially designed for audio programmes on tape or disk, analogue recording or reproducing of video programmes on tape or disk or digital reproducing (ie, play-back only) of video programmes from tape or disk; | ||
| b equipment specially designed to use magnetic card, tag, label or bank cheque recording media with a magnetic surface area not exceeding 85 cmu22 (13 sq ins); | ||
| c analogue magnetic tape recorders having all of the following characteristics– | ||
| i bandwidth at maximum speed not exceeding 300 kHz per track; | ||
| ii recording density not exceeding 2,000 magnetic flux sine waves per linear cm (5,080 magnetic flux sine waves per linear inch) per track; | ||
| iii not including recording or reproducing heads designed for use in equipment with characteristics superior to those defined in (i) or (ii) above; | ||
| iv tape speed not exceeding 155 cm per second (61 inches per second); | ||
| v number of recording tracks (excluding audio voice track) not exceeding 28; | ||
| vi start-stop time not less than 25 milliseconds; | ||
| vii equipped with tape-derived (off-tape) servo speed control and with a time displacement (base) error, measured in accordance with applicable IRIG or EIA documents, of no less than .266 5 microsecond; | ||
| viii using only direct or FM recording; | ||
| ix not ruggedised for military use; | ||
| x not rated for continuous operation in ambient temperatures from below 233 K to above 328 K (from below –40°C to above +55°C); and | ||
| xi not specially designed for underwater use; | ||
| d digital recording or reproducing equipment having all of the following characteristics– | ||
| i cassette/cartridge tape drives or magnetic tape drives which do not exceed– | ||
| a a maximum bit packing density of 131 bit per mm (3.300 bit per inch) per track; or | ||
| b a maximum bit transfer rate of 2.66 million bit per second; | ||
| ii not ruggedised for military use; | ||
| iii not specially designed for underwater use; and | ||
| iv not rated for continuous operation in ambient temperatures from below 233 K to above 328 K (from below –40°C to above +55°C); | ||
| 2 Recording or reproducing equipment using laser beams, which produce patterns or images directly on the recording surface or reproduce from such surfacesA | ||
| except | ||
| a when specially designed for the production of audio or video disk masters for the replication of entertainment– or education-type disks; | ||
| b fascimile equipment such as used for commercial weather imagery and commercial wire photos and text; | ||
| c consumer-type reproducers for audio or video disks employing non-erasable media;or | ||
| d when specially designed for gravure (printing plate) manufacturing; | ||
| 3 Graphics instruments capable of continuous direct recording of sine waves at frequencies exceeding 20 kHzA | ||
| 4 Recording media used in equipment specified in (1) or (2) aboveA | ||
| except | ||
| a magnetic tape having all of the following characteristics– | ||
| i specially designed for television recording and reproduction or for instrumentation; | ||
| ii being a standard commercial product; | ||
| iii not designed for use in satellite applications; | ||
| iv in use in quantity for at least two years; | ||
| v a tape width not exceeding 25.4 mm (1 inch); | ||
| vi a magnetic coating thickness not less than– | ||
| a 2.0 micrometres (0.079 mil) if the tape length does not exceed 1,450 m (4,760 feet);or | ||
| b 5.0 micrometres (0.1975 mil) if the tape length does not exceed 6,000 m (19,710 feet); | ||
| vii a magnetic coating material consisting of doped or undoped gamma-ferric oxide or chromium dioxide; | ||
| viii a base material consisting only of polyester; | ||
| ix a rated intrinsic coercivity not exceeding 64 kA/m (804 oersted); and | ||
| x a retentivity not exceeding 0.16 T (1,600 gauss); | ||
| b magnetic tape having all of the following characteristics– | ||
| i specially designed for television recording and reproduction or for instrumentation; | ||
| ii being a standard commercial product; | ||
| iii not designed for use in satellite applications; | ||
| iv in use in quantity for at least two years; | ||
| v a tape width not exceeding 50.8 mm (2 inches); | ||
| vi a magnetic coating material consisting of doped or undoped gamma-ferric oxide or chromium dioxide; | ||
| vii a rated intrinsic coercivity not exceeding 64 kA/m (804 oersted); and | ||
| viii a tape length not exceeding 1,096m; | ||
| c video or audio magnetic tape in cassette having all of the following characteristics– | ||
| i specially designed for television or audio recording and reproduction; | ||
| ii being a standard commercial product; | ||
| iii a rated intrinsic coercivity not exceeding 120 kA/m (1,500 oersted); | ||
| iv a rententivity not exceeding 0.30 T (3,000 gauss); | ||
| v a tape length not exceeding 550 m; and | ||
| vi a magnetic coating thickness not less than 2.0 micrometres (0.079 mil); | ||
| d computer magnetic tape having all of the following characteristics– | ||
| i designed for digital recording and reproduction; | ||
| iii a magnetic coating certified for a maximum “packing density” of 2,460 bit per cm (6,250 bit per inch) or 3,560 flux changes per cm (9,042 flux changes per inch) along the length of the tape; | ||
| iii a magnetic coating thickness not less than 3.6 micrometres (0.142 mil); | ||
| iv a tape width not exceeding 25.4 mm; | ||
| v a tape length not exceeding 1,100 m; | ||
| vi been in civil use for at least two years; | ||
| vii the base material consists only of polyester; | ||
| e computer flexible disk cartridges having both of the following characteristics– | ||
| i designed for digital recording and reproduction and | ||
| ii not exceeding a gross capacity of 17 million bit; | ||
| f rigid magnetic disk recording media having all of the following characteristics– | ||
| i being a standard commercial product; | ||
| ii non servo-written; | ||
| iii a packing density not exceeding 866 bit per cm (2,200 bit per inch); | ||
| iv not exceeding 80 tracks per cm (200 tracks per inch) and | ||
| v conforming to any of the following specifications– | ||
| a unrecorded single disk cartridges (front loading (2315-type)) designed to meet ANSI X3.52-1976; | ||
| b unrecorded single disk cartridges (top loading (5440-type)) designed to meet International Standard ISO 3562-1976; | ||
| c unrecorded six-disk packs (2311 type) designed to meet ANSI X3.46-1974 or International Standard ISO 2864-1974(E); or | ||
| d unrecorded eleven-disk packs (2316 type) designed to meet ANSI X3.58-1977 or International Standard ISO 3564-1976; | ||
| 5 Specially designed components, software and accessories for the equipment specified in heads (1) to (4) above (inclusive) | A | |
| In this entry– | ||
| “Recording media” means all types and forms of specialised media used in recording techniques, including but not limited to tapes, drums, disks and matrices. | ||
| “Recording density” for direct recorders means the recording bandwidth divided by the tape speed. | ||
| “Recording density” for FM recorders means the sum of the carrier frequency and the deviation divided by the tape speed. | ||
| “Packing density” for digital recorders means the number of bits per second per track divided by the tape speed. | ||
| IL1573 | Superconductive electromagnets and solenoids, of the following types– | |
| 1 Those specially designed for gyrotron application having a non-uniform distribution of current-carrying windings, measured along the axis of symmetry, | A | |
| except when rated for magnetic induction of less than 1 tesla and having overall current density in the windings of less than 10,000 A/cmu22. | ||
| 2 Those specially designed to be fully charged or discharged in less than one minute and having all of the following characteristics– | ||
| a the maximum energy delivered during discharge divided by the duration of the discharge being more than 500 kJ per minute; | A | |
| b the inner diameter of the current-carrying windings being more than 6 cm; and | A | |
| c being rated for magnetic induction of more than 8 tesla or for overall current density in the windings of more than 10,000 A/cmu22 | A | |
| In this entry “overall current density” means the total number of ampere-turns in the coil (that is, the sum of the number of turns multiplied by the maximum current carried by each turn) divided by the total cross-section of the coil (including the superconducting filaments, the metallic matrix in which the superconducting filaments are embedded, the encapsulating material and any cooling channels). | ||
| IL1574 | Electronic devices, circuits and systems specially designed for or capable of operation at temperatures below 103K (–170°C) and incorporating components manufactured from superconducting materials which perform functions such as electro-magnetic sensing and amplification, current switching, frequency selection or electromagnetic energy storage at resonant frequencies above 1 MHz, including but not limited to the following– | |
| 1 Josephson-effect devices | A | |
| 2 Dayem bridges | A | |
| 3 Weak-link devices | A | |
| 4 Proximity-effect devices | A | |
| 5 Phase slip devices | A | |
| 6 SNS (super-normal-super) bridges | A | |
| 7 SIS (superconductor-insulator-superconductor) devices | A | |
| 8 Quasiparticle devices and detectors | A | |
| IL1584 | Cathode-ray oscilloscopes and specially designed components therefor including associated plug-in units, external amplifiers, pre-amplifiers and sampling devices, having any of the following characteristics– | |
| 1 An amplifier or system bandwidth greater than 250 MHz | A | |
| 2 A horizontal sweep faster than 1 nanosecond per cm with an accuracy (linearity) better than 2% | A | |
| 3 Incorporating or designed for use with cathode-ray tubes specified in the entry in Group 3F relating to electronic cathode-ray tubes | A | |
| 4 Ruggedised to meet a military specification | A | |
| 5 Rated for operation over an ambient temperature range of from below –25°C to above +55°C | A | |
| 6 Using sampling techniques for the analysis of recurring phenomena which increase the effective bandwidth of an oscilloscope or time domain reflectometer to a frequency greater than 4 GHz | A | |
| 7 Digital oscilloscope with sequential sampling of the input signal at an interval of less than 50 nanoseconds. | A | |
| In this entry “bandwidth” means the band of frequencies over which the deflection on the cathode-ray tube does not fall below 70.7% of that at the maximum point measured with a constant input voltage to the amplifier. | ||
| IL1585 | Photographic apparatus and film, the following– | |
| 1 High speed cinema recording cameras and equipment, the following– | ||
| a cameras in which the film is continuously advanced throughout the recording period, and which are capable of recording at framing rates exceeding 13,150 frames per second, using any camera and film combination from the standard 8 mm to the 90 mm size (inclusive) | A | |
| b special optical or electronic devices which supplement, replace, or are interchangeable with, standard camera components for the purpose of increasing the number of frames per second | A | |
| 2 High speed cameras in which the film does not move, and which are capable of recording at rates exceeding 1,000,000 frames per second for the full framing height of standard 35 mm wide photographic film, or proportionately higher rates for lesser frame heights, or proportionately lower rates for greater frame heights | A | |
| 3 Cameras incorporating electron tubes specified in sub-head (3)(a) of the entry in Group 3F relating to electronic cathode-ray tubes, vacuum tubes or valves. | A | |
| 4 Streak cameras having writing speeds of 10 mm per microsecond and above | A | |
| 5 Camera shutters with speeds of, or greater than, 50 nanoseconds per operation and specially designed parts, components and accessories therefor | A | |
| 6 Film, the following– | ||
| a high speed film having– | ||
| i an intensity dynamic ratio of 1,000,000 to 1 or more; or | A | |
| ii a speed of ASA 10,000 (or its equivalent) or better | A | |
| b colour film having a spectral sensitivity extending beyond 7,200 Angstrom or below 2,000 Angstrom | A | |
| 7 High speed plates having an intensity dynamic range of 1,000,000 to 1 or more | A | |
| IL1586 | Acoustic wave devices and specially designed components therefor, the following– | |
| 1 Surface acoustic wave and surface skimming (shallow bulk) acoustic wave devices which permit the direct processing of signals, including but not limited to convolvers, correlators (fixed, programmable and memory), oscillators, bandpass filters, delay lines (fixed and tapped) and non-linear devices having any of the following characteristics– | A | |
| a a carrier frequency of greater than 400 MHz; | ||
| b a carrier frequency of 400 MHz or less (except such devices specially designed for domestic and entertainment purposes) having any of the following characteristics– | ||
| i a side-lobe rejection of greater than 45 dB; | ||
| ii a product of the maximum delay time in microseconds and the bandwidth in MHz greater than 100; | ||
| iii a dispersive delay of greater than 10 microseconds; or | ||
| iv an insertion loss of less than 10 dB. | ||
| 2 Bulk (volume) acoustic wave devices which permit the direct processing of signals at frequencies greater than 1 GHz, including but not limited to fixed delay lines, non-linear and pulse compression devices | A | |
| 3 Acousto-optic signal-processing devices employing an interaction between acoustic waves (bulk wave or surface wave ) and light waves which permit the direct processing of signals or images, including but not limited to spectral analysis, correlation or convolution | A | |
| In this entry “acoustic wave devices” means signal processing devices employing elastic waves in materials including but not limited to lithium niobate, lithium tantalate, bismuth germanium oxide, silicon, quartz, zinc oxide, aluminium oxide (sapphire), gallium arsenide and alpha-aluminium phosphate (berlinite). | ||
| IL1587 | Quartz crystals having peizo-electric qualities, in worked, semi-finished or mounted form including assemblies, the following– | |
| 1 Filter elements having either of the following characteristics– | ||
| a types designed for operation over a temperature range wider than 125°C; or | A | |
| b types making use of the trapped energy phenomenon and having more than three series or parallel resonances on a single quartz element | A | |
| except those designed for operation as intermediate frequency filters operating from 10.5 to 11 MHz or from 21 to 22 MHz with 3 dB bandwidths not exceeding 40 kHz, or for operation as single sideband filters operating at from 1 to 10 MHz with 3 dB bandwidths not exceeding 4 kHz. | ||
| 2 Oscillator elements specially designed for temperature-controlled crystal ovens or for temperature-compensated crystal oscillators described in head (3) of this entry and having an average ageing rate of of .26610u2–u29 per day or better | A | |
| 3 Temperature-compensated crystal oscillators having any of the following characteristics– | ||
| a a temperature stability of better than .2660.00015% over their operating temperature range; | A | |
| b an operating temperature range wider than 120°C; | A | |
| c capable of reaching to within 10u2–u27 of normal operating frequency or better in 3 minutes or less from switch-on at an ambient temperature of 25°C; | A | |
| d rated to have an accelaration sensitivity of less than 10u2–u29 of the operating frequency per g (where g = 981 cm/secu22) over a vibration test frequency range from 10 to 2,000 Hz sine wave and with a maximum level of acceleration not exceeding 20 g; | A | |
| e designed to withstand a shock greater than 10,000 g (where g = 981 cm/secu22) over a period of 1 millisecond; or | ||
| f radiation hardened to better than 10u2–u21u20 of the operating frequency per gray (1 rad = 10u2–u22 gray) | A | |
| In this entry “ageing rate” shall be measured over a longer period at a constant temperature (within .266 2°C) of +60°C or more. | ||
| IL1588 | Materials composed of crystals having spinel, hexagonal, orthorhombic or garnet crystal structures, and thin film devices, the following– | |
| 1 Monocrystals of ferrites and garnets (synthetic only) | A | |
| 2 Single aperture forms possessing either of the following characteristics– | ||
| a switching speed of 0.3 microsecond or faster at the minimum field strength required for switching at 40°C; or | A | |
| b a maximum dimension less than 0.45 mm | A | |
| 3 Multi-aperture forms with fewer than 10 apertures possessing either of the following characteristics– | ||
| a switching speed of 1 microsecond or faster at the minimum field strength required for switching at 40°C; or | A | |
| b a maximum dimension less than 2.54 mm | A | |
| 4 Multi-aperture forms having 10 or more apertures | A | |
| 5 Memory storage or switching devices, the following– | ||
| a thin film (including plated wire and plated rods) devices | A | |
| b single crystal or amorphous film magnetic bubble devices | A | |
| c moving domain devices | A | |
| d crosstie devices | A | |
| 6 Magnetic ferrite materials having square loop characteristics, suitable for operating above 1 GHz and having all of the following characteristics | A | |
| a a saturation magnetisation of more than– | ||
| i 0.2 tesla for lithium-based ferrites; or | A | |
| ii 0.3 tesla for other ferrites | A | |
| b a dielectric loss tangent of less than 0.001 measured at a frequency of 1 GHz or higher | A | |
| c a ratio of the remanent magnetisation (Br) to the saturation magnetisation (4 Ms) not less than 0.7 | A | |
| 7 Rod forms possessing either of the following characteristics– | ||
| a a switching speed of 0.3 microsecond or faster at the minimum field strength required for switching at 40°C; or | A | |
| b a minimum dimension less than 0.254 mm | A | |
| 8 Assemblies of, and devices incorporating, any of the items specified in heads (1) to (7) above (inclusive) | A | |
| IL1595 | Gravity meters (gravimeters), gravity gradiometers and specially designed components therefor, except gravity meters for land use having static accuracies of 100 microgal or less and land gravity meters of the Worden type | A |
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