1967-HKRS30-8-58_Part02 — Page 39

1518.

1519.

1.520.

13

(d) Designed to provide a multiplicity of alternative output frequencies controlled by a leaser number of piezo- electric crystals, except equipments in which the output frequency is selected only by manual operation either on the equipment or on a remote control unit and-

(1) those forming multiples of a common control Frequency, or

(2) those in which the output frequency is a multiple of a common frequency which is not less than 1/1,000th part of the oscillator frequency and is in steps of 1 kilocycle per second or greater:

(c) Components and sub-assemblies, including but not limited to intermediate-frequency and power amplifiers and their parts, modulators and modulation amplifiers, aerials, their filters and their connecting devices, control equipment placed in racks, and maintenance equipmcot, specially designed for transmitters covered by sub-items (p) and (b), except quartz crystals which are covered by itern 1587, Group G.

Telemelering and telecontrol equipment suitable for use with aircraft (piloted or pilotless), space vehicles or weapons (guided or unguided), and test equipment specially designed for such equipment.

Telegraph equipment, as follows

(a) Equipment (machines), mechanical, electro-mechanical, or electronic, used to translate the information contained in written or printed text into electrical waveforme suitable for transmission over communication circuits at any speed greater than 500 words per minute or 375 bauds, whichever is the less;

(6) Equipment designed to accept such electrical waveforms within the limits 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 biu per second (bands) or at a rate (applicable to single channels or to cach sub-channel in a multi-channel system) in bits per second (bauds) numerically in excess of 75% of the channel (or sub-channel) bandwidth in cycles per second;

(d) Specialized component parts and accessories for such equip.

ment.

Radio relay communications equipment and specialized come ponents and sub-assemblies therefor, designed for use-

(a) at frequencies in excess of 300 megacycles per second but not exceeding 470 megacycles per second and having any of the following characteristics-

(i) a power output exceeding 5 watts; or

(i) a signal bandwidth at the input to the modulator exceeding the limits set forth in item 1523(a); or

(ii) for other than fixed service;

(b) at frequencies in excess of 470 megacycles per second.

1521.

1523.

1525.

19

Amplifiers, oscillators and related equipment, not elsewhere specified, as follows-

(0) Amplifiers designed to operate at frequencies in excess of

500 megacycles per second;

(6) Tuned amplifiers having a bandwidth which exceeds 10 megacycles per second or 10% of the mean frequency, whichever is less, cxcept those specially designed for use in community television distribution systems;

(2) Untured amplifiers having a bandwidth which exceeds 10

megacycles per second:

(d) Direct current amplifiers, amplifying by whatever means, 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 10-16 watts or less; (2) Parametric amplifiers with a noise figure of merit of 5 decibels or less measured at a temperature of 17°C.; paramagnetic amplifiers; other amplifier or oscillator devices such as Masers, Lasers and Irasers, which amplify or oscillate by means of stimulated electromagnetic radiation: specially designed parts therefor; any equipment containing such amplifiers, oscillators or devices.

Communication transmission equipment, as follows- (a) Terminal and intermediate repeater or amplifier equipment designed to deliver, carry or receive frequencies higher than 150 kilocycles per second into, or in, a communications system, excluding carrier communication terminals specially designed for power lines and operating at frequencies below 1,500 kilocycles per second;

(b) Single and multi-channel telegraph terminal transmilling

and receiving equipment excluding-

(1) equipment with a bandwidth per channel of not more than 240 cycles per second and with a rate speed of not more than 100 bauds (or 134 words per minute) per channel designed to C.CLT standards;

(i) equipment used with telemetering, telecommand and Lelesignalling 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 maximum 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-assemblics for

the above equipment.

Coaxial-type communications cable, as follows-

(a) Containing substances covered by item 1754, Group 1;

(6) Using a mineral insulator dielectric:

fel Using a dielectric aired by discs, beads, spiral, screw or

any other means;