CONTROL AND SWITCH SETTINGS - TM-11-5820-670-300125

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

POSITION/SETTlNG

CONTROL OR SWITCH

EQUIPMENT

XMTR HI-LO

RT-823/ARC-131

T/R

MODE SWITCH

TS-2575/ARC-131

CARR

SQUELCH

75.05 MHz

FREQ sel

OFF

TRANSMIT switch

HI-LO switch

Transmit-lnterphone selector

C-1611 D/AIC

RECEIVER 1 switch

104

GATE TIME (see - 1)

AN/USM-207

FREQ

FUNCTION switch

TRACK

POWER switch

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