Figure 3-5. Converter, Telephone Signal CV-1548/G.

TM 11-5895-458-14

(1) Transmitter, Radio T-983 (P)/ GRC- 103( V)

3-6. Radio Set AN/GRC-103(V)l

with Amplifier-Frequency Multiplier AM-4320/GRC-

a. Use . Radio Set AN/GRC-103(V)1 (fig. 3-6) is

103 (V).

a transportable radio set that provides facilities for

Frequency range:

multichannel radio transmissions and reception of

Band I

220.0 MHz to 404.5 MHz

pulse-code modulation (pcm) signals.

With

(channels 40-409).

appropriate plug-in transmitting and receiving units, the

Band II .................... 394.5 to 705.0 MHz

radio set operates in the frequency range of 220 to

(channels 389-1,010).

1,000 MHz in any one of 1,561 (RF) channels

Band III ................69.0 to 1000 MHz

selectable in 0.5 MHz increments. The radio set will

(channels 990-1,600).

accommodate up to 24 telephone channels when used

Channel/Frequency conversion Channel No. + 200 =

with the appropriate pcm multiplex equipment.

Configurations of Radio Set AN/GRC-103 (V) are the

...................................... frequency in MHz

AN/GRC-103 (V)1 (Band I), the AN/GRC- 103(V)2

Frequency accuracy...... ≠20 kHz

(Band II), and AN/GRC-103(V)3 (Band III). Operating

with its own antenna system Radio Set AN/GRC-103

Output power:

(V)(*) provides good performance over line-of-sight

Band I ..................25 watts minimum

paths in excess of 50 miles (80.45 kilometers) and has

Band II .................15watts minimum

sufficient reserve power to give satisfactory operation

Band III ................15 watts minimum

over obstructed paths. An order wire circuit, which

Output impedance......50 ohms, nominal, un

includes facilities that connect all stations of a system

balanced

on a party line basis, is provided for the use of

Modulation..................Frequency Modulation (FM)

Frequency deviation............ ≠300 kHz maximum

operating and maintenance personnel.

b. Technical Characteristics.

Output vswr ......................... 1.6:1 maximum

Deviation sensitivity............. 00 kHz to 400 kHz per volt

adjustable.

Input impedance, video ....... 91 ohms unbalanced

Input impedance, order

wire ............................... 600 ohms unbalanced

Frequency response....... .... Gaussian; -2.9 0.7

decibels (dB) at 500 kHz;

3-7