2. Communication, delection or tracking equipment of a kind using ultraviolet radiation, infra-red radiation or ultrasonic waves; and specialized parts therefor.
3. Communication equipment employing tropospheric, ionospheric or meteoric scatter phenomena and specially designed sub-assemblies, parts and test equipment therefor.
4. "Jamming" apparatus (ie. apparatus specially designed to jam or otherwise
interfere with radio reception); and specialized parts therefor.
5. Location apparatus, underwater: apparatus for detecting or locating objec
under water by magnetic or acoustic or ultrasonic methods, and specialized components of such apparatus, except-
(a) Marine depth sounders of a kind used solely for measuring the depth of water or the distance of submerged objects vertically" below the apparatus;
(b) Specific types of horizontally operated fish and/or whale finding
equipment.
6. Pulse modulators capable of providing electric impulses of peak power exceeding 200 KW or of a duration of less than 0.1 microsecond, or with a duty cycle in excess of 0.002; and pulse transformer, pulse-forming equipment or delay lines being specialized parts of such modulators.
7. Radio receivers, panoramic (being receivers which search automatically a part of the radio-frequency spectrum and indicate the signals received); and specialized parts therafor,
8. Radio transmitters and components.
9. Telemetering and telecontrol equipment suitable for use with aircraft (piloted or pilotless), space vehicles or weapons (guided or unguided), and (teal equip ment specially designed for such equipment.
10. Telegraph equipment, as follows-
(a) Equipment (machines), mechanical, electromechanical, or electronic, used to translate the information contained in written or printed text into clectrical waveforms suitable for transmission over communication circuits at any speed greater than 500 words per minute or 375 bauds, whichever is the leas;
(6) Equipment designed to accept such electrical waveforms within the lindus laid down in sub-item (a) and display the information from them in visible form;
(c) Terminal equipment, not elsewhere specified, capable of transmitting and/or receiving digital data at a rate in excess of 2,000 bits per second (bauds) or at a rate (applicable to single channels or to each sub-channel in a multi-channel system) in bits per second (bauds) numerically in exceES of 75% of the channel (or sub-channel) bandwidth in cycles per second; (d) Specialized component parts and accessories for such equipment. 1, Radio relay communications equipment designed for use at frequencies in excess of 300 Mo/s and specialized components and sub-assemblies therefor, other than short-range and low-power links for transmission between the camera or studio and the television transmitter.
12. Amplifers, oscillators and related equipment, not elsewhere specified, as
follows---
(a) Amplifiers designed to operate at frequencies in excess of 500 Majs (5) Tuned amplifiers having a bandwidth which exceeds 10 Mc/s or 10% of the mean frequency, whichever is less, except those specially designed for use in community television distribution systems;
!
(e) Untuned amplifiers having a bandwidth which exceeds 10 Mc/s; (2) DC. amplifiers, amplifying by whatever meany, having a noise level (referred to the input circuit) of 10-16 Watts or less and/or a zero drift in 1 hour corresponding to a change in input power of 10-15 Wates or Jess:
(e) Parametric amplifiers with a noise figure of merit of 5 decibels or less measured at a temperature of 17°C: paramagnetic amplifiers; other am- plifier or oscillator devices which amplify or oscillate by means of stimulated electromagnetic radiation (including but not limited to MASERS, LASERS and ERASERS), specially designed parts therefor; and any equipment containing such amplifiers, oscillators or devices. 19. Communication transmission equipment, as follows-
(4) Terminal and intermediate repeater or amplifier equipment designed to deliver, carry or receive frequencies higher than 150 Ro/s into, or in, a communications system, excluding carrier communication terminals specially designed for power lines and operating at frequencies below 1,500 Kc/8
(6) Single and multi-channel telegraph terminal transmitting and receiving
equipment, excluding-
(0) Equipment with a bandwidth per channel of not more than 240 c/s and with a rated speed of not more than 100 bauds (or 134 words per minute) per channel designed to CCIT, standards;
(1) Equipment used with tekernetering, telecommand and telesignalling equipment designed for industrial purposes, in which the operational aggregate speed of the telegraph equipment is less than 1,200 bits per second (bauds);
(i) Time-division multiplex systems up to 6 channels with a miximum aggregate speed of 300 bauds and/or 72 words per minute per channel, provided that they do not contain an automatic error detection and correction system using a multiple check;
(c) Specialized components, accessories, and sub-assemblies for the above
equipment.
14. Coaxial-type communications cable as follows-
(c) Containing substances covered by item 9. Group H;
(b) Using a mineral insulator dielectric:
(c) Using a dielectric aired by discs, beads, spiral, screw or any other
means:
(d) Designed for pressurization or use with a gas dielectric;
(e) Intended for submarine laying.
15. Communication cable, including submarine cable, containing more than one pair of conductors of which any one of the conductors, single or stranded, has a diameter exceeding 0.9 nim.
16. Cipher machines and associated equipment such as key generators and tape mixers designed to provide a secrecy capability for analogue or digital transmissions or a combination of the two.
17. Electronic measuring. testing or calibrating instruments, not elsewhere
specified, as follows—
(a) Those designed for use at frequencies in excess of 1.000 Mc/s, except
radio spectrum analysers;
(6) Testing instruments rated to maintain their specified operating data when operating over a range of ambient temperatures extending from below -25°C. to above +55°C.;
(e) Radio testing equipment, not elsewhere specified.