Specifications

TM 11-5820-670-30
2-12. TRANSMITTER TONE MODULATION TEST. (CONT)
CONTROL AND SWITCH SETTlNGS
EQUIPMENT
TS-2575/ARC-131
ME-57/U
C-1611 D/AlC
CONTROL OR SWITCH
MODE SWITCH
VOL
SQUELCH
FREQ sel
TRANSMIT switch
TUNING
DEVIATION RANGE – KC
FREQUENCY RANGE – MC
Selector switch
Transmit-lnterphone selector
RECEIVER 1 switch
POSITION/SETTING
T/R
Maximum (clockwise)
DIS
75.95 MHz
OFF
75.95 MHz
20
55-120
TUNE
1
ON
TEST PROCEDURE
1. Set test set TRANSMIT switch to ON and measure frequency and deviation of 150 Hz transmitter
tone signal.
STANDARD. frequen - 148 H Z to 152 H Z
deviation – 2.5 kHz to 3.5 kHz
2. If frequency and deviation are not within tolerances of the standard, see troubleshooting
chart 2-15.
3. Set test set SQUELCH switch to CARR.
STANDARD. frequen – 148 Hz to 152 Hz
deviation – 2.5 kHz to 3.5 kHz
4. If frequency and deviation are not within the tolerances of the standard, see troubleshooting
chart 2-15.
5. Set test set SQUELCH switch to TONE and measure the frequency and deviation of the 150 Hz
transmitter tone signal.
STANDARD. frequen – 148 kHz to 152 H Z
deviation – 2.5 kHz to 3.5 kHz
6. If frequency and deviation are not within tolerances of the standard, see troubleshooting
chart 2-15.
2-25