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Page Title:
Audio Response Test (X-Mode) at 500 Hz |
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|  TM 11-5820-401-34/0967-LP-432-3060
3-9. RECEIVER AUDIO RESPONSE TEST (XMODE).(CONT)
CONTROL/JSWITCH
POSITION/SETTING
POWER
TRACK
DISPLAY
MIN (fully counterclockwise)
SENSITIVITY
0.1
GATE TIME
1 (black knob)
FUNCTION
FREQ
4.
Disconnect rf cable from Adapter UG-514. (See test setup diagram page 3-26.)
5.
Connect rf cable to AN/USM-207 FREQ A connector.
6.
Adjust AN/URM-127 FREQ RANGE DIAL for 1-kHz display on AN/USM-207.
7.
Disconnect rf cable from AN/USM-207 FREQ A connector.
Reconnect rf cable to Adapter UG-514.
8.
Connect ME-30(*)/U INPUT lead A to MK-1978/VRC AUX RCVR .iack (inside X-MODE square).
9.
.
.
Connect lead Bto GND jack. Note meter indication.
STANDARD. ME-30(*)U meter should indicate at least 0.78 volt.
10. If ME-30(*)/U meter does not indicate at least 0.78 volt, see troubleshooting chart 3-9.
Audio Response Test (X-Mode) at 500 Hz
Turn AN/URM-127 FREQ RANGE DIAL to 50.
11.
12.
Disconnect rf cable from Adapter UG-514. (See test setup diagram
13.
Connect rf cable to AN/USM-207 FREQ A connector.
14.
Adjust AN/URM-127 FREQ RANGE DIAL for 500-Hz display on AN/USM-207.
15.
Disconnect rf cable from AN/USM-207 FREQ A connector.
16.
Reconnect rf cable to Adapter UG-514.
STANDARD. ME-30(*)/U meter should indicate between + 2 db and -3 db of reading noted in
step 9.
17. If ME-30(*)/U meter does not indicate between + 2 db and -3 db of reading taken in step 9, see
troubleshooting chart 3-9.
Audio Response Test (X-Mode) at 3 kHz
Turn AN/URM-127 FREQ RANGE MULTIPLIER to x100.
18.
Turn FREQ RANGE DIAL to 30.
19.
Disconnect rf cable from Adapter UG-514. (See test setup diagram
20.
21.
Connect rf cable to AN/USM-207 FREQ A connector.
22.
Adjust AN/URM-127 FREQ RANGE DIAL for 3-kHz display on AN/USM-207.
23.
Disconnect rf cable from AN/USM-207 FREQ A connector.
Reconnect rf cable to Adapter UG-514.
24.
STANDARD. ME-30(*)/U meter should indicate between + 2 db and -3 db of reading noted in
step 9.
25. If ME-30(*)/U meter does not indicate between + 2 db and -3 db of reading noted in step 9, see
troubleshooting chart 3-9.
3-28
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