Specifications

TM 11-5820-670-30
2-16. TRANSMITTER FREQUENCY STABILITY TEST. (CONT)
INITIAL EQUIPMENT CONTROL SETTINGS
Set equipment controls as indicated in the following table.
CONTROL AND SWITCH SETTINGS
EQUIPMENT
RT-823/ARC-131
TS-2575/ARC-131
C-1611 D/AIC
AN/USM-207
CONTROL OR SWITCH
POSITION/SETTlNG
XMTR HI-LO
MODE SWITCH
SQUELCH
FREQ sel
TRANSMIT switch
HI-LO switch
Transmit-lnterphone selector
RECEIVER 1 switch
GATE TIME (see - 1)
FUNCTION switch
POWER switch
LO
T/R
CARR
75.05 MHz
OFF
LO
1
ON
10
4
FREQ
TRACK
TEST PROCEDURE
1. Place test set TRANSMIT switch to ON and observe the output frequency as indicated on
AN/USM-207 readout.
STANDARD. 75.05 ± 3.5 kHz
2. If reading on Frequency Counter AN/URM-207 is not within limits of the standard, see trouble-
shooting chart 2-19.
3. Place test set TRANSMIT switch to OFF position.
4. Repeat steps 1 through 3 adjusting the FREQ sel on TS-2575/ARC-131 for each of the following
frequencies: 30.00 MHz, 52.00 MHz, 53.00 MHz, 75.00 MHz, 75.10 MHz, 75.20 MHz,
75.30 MHz, 75.40 MHz, 75.50 MHz, 75.60 MHz, 75.70 MHz, 75.80 MHz, and 75.90 MHz.
NOTE
The standard for the frequencies selected in step 4 is the frequency selected ±3.5 kHz.
2-33