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CONTROL, RADIO SET C-7088/ARC-131
Up
TM-11-5820-670-12 Radio Set AN/ARC-131(NSN
Next
ADDITIONAL EQUIPMENT REQUIRED.


TM 11-5820-670-12
EQUIPMENT DATA.
1-11.
GENERAL
30.00 to 75.95 MHz
Frequency range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
920 channels, spaced 50 kHz
Number of channels and spacing . . . . . . . . . . . . . . . .
Number of crystals in crystal reference
14 crystals
system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 second maximum at 40F(-40C)
Channel change time . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . .
Within 3.5 kHz of selected channel center
Frequency stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
frequency in less than 20 seconds
Fm voice, homing, retransmission, or
Modes of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
X-mode
24 to 29 vdc, transmit, 4.0 amperes maxi-
Input voltage and current requirements . . . . . . . . . . . . . .
mum; receive 1.0 ampere
500 to 3,000 Hz
Audio response, narrow band . . . . . . . . . . . . . . . . . .
500 to 20,000 Hz
Audio response, wide band . . . . . . . . . . . . . . . .
KY-28 or KY-8
Security adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TRANSMllTER
10 watts minimum
Power output, high . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 watt nominal
Power output, low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crystal, indirect synthesis
Frequency control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous transmission to 15,000 feet at
Duty cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
150F (65C) or 35,000 feet at 85F
(29C)
50 ohms
Rf output impedance . . . . . . . . . . . . . . . . . . . . . . . . . .
.
Narrow band 10%, wide band 7%
Overall system distortion . . . . . . . . . . . . . . . . . . . . .
.
50 db
Signal plus noise-to-noise ratio . . . . . . . . . . . . . . . .
.
Narrow band 8 kHz, wide band 20 kHz;
D e v i a t i o n. . . . . . . . . . . . . . . . . . . . .
.
150 Hz tone 3 kHz
Receiver
Single coversion superheterodyne
Receiver type . . . . . . . . . . . . . . . . . . . . . . . . .
.
11.5 MHz
Intermediate frequency . . . . . . . . .  . . . . .
.
Fm voice or tone
Signals received . . . . . . . . . . . . . . . . . . . . . . .
.
32 kHz minimum at 6 db points; 80 kHz
If selectivity . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
maximum at 60 db points; 100 kHz
maximum at 85 db points
Rf input of 0.5 microvolt modulated at
Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1,000 Hz with 8 kHz deviation pro-
duces a signal-plus-noise-plus deviation
to noise plus deviation ratio of 10 db
(tp milliwatts) into a 150-ohm load.
50 milliwatts into a 150-ohm load, fre-
Audio output characteristics . . . . . . . . . . . . . . .
quency response 500 3000 Hz
Narrow band 8/0, wide band 5/0
Audio distortion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Carrier (noise) or tone (150 Hz)
Types of squelch . . . . . . . . . . . . . . . . . . . . . . . . .
1-6


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