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Page Title:
Audio Response Test (Normal Mode) at 500 Hz |
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|  TM
11-5820-401-34-3/0967-LP-432-3060
5-8. RECEIVER AUDIO RESPONSE TEST (NORMAL MODE). (CONT)
Audio Response Test (Normal Mode) at 1 kHz
3. Set AN/USM-207 controls to the following positions:
CONTROL/SWITCH
POSITION/SETTING
I
POWER
TRACK
DISPLAY
MIN (fully counterclockwise)
SENSITIVITY
0.1 v
GATE TIME
1 (black knob)
FUNCTION
FREQ
4.
Disconnect rf cable from Adapter UG-514. (See test setup diagram
5.
Connect rf cable to AN/USM-207 FREQ A connector (3).
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.
8.
Reconnect rf cable to Adapter UG-514.
9.
Connect ME-30(")/U INPUT lead A to Test Cable No. 1 terminal F; connect lead B to
terminal A.
10. Adjust R-442/VRC VOLUME control for 17-volt indication on ME-30(*)/U. Do not change
VOLUME control position during rest of test.
STANDARD. A 1-kHz modulating tone injected into the R-442/VRC should produce 17 volts at the
output.
11. If R-442/VRC VOLUME control adjustment cannot produce 17-volt indication on ME-30(*)/U,
see troubleshooting chart 5-10.
Audio Response Test (Normal Mode) at 500 Hz
12.
Turn AN/URM-127 FREQ RANGE DIAL to 50.
13.
Disconnect rf cable from Adapter UG-514. (See test setup diagram
.)
14.
Connect rf cable to AN/USM-207 FREQ A connector.
15.
Adjust AN/URM-127 FREQ RANGE DIAL for 500-Hz display on AN/USM-207.
16.
Disconnect rf cable from AN/USM-207 from FREQ A connector.
17.
Reconnect rf cable to Adapter UG-514.
STANDARD. ME-30(*)/U should Indicate between 14 and 22 volts,
18. If ME-30(*)/U indicates below 14 volts or above 22 volts, see troubleshooting chart 5-5.
Audio Response Test (Normal Mode) at 3kHz
19.
Turn AN/URM-127 FREQ RANGE MULTIPLIER to x100.
20.
Turn FREQ RANGE DIAL to 30.
21.
Disconnect rf cable from Adapter UG-514. (See test setup diagram
.)
22.
Connect rf cable to AN/USM-207 FREQ A connector.
23.
Adjust AN/URM-127 FREQ RANGE DIAL for 3-kHz display on AN/USM-207.
24.
Disconnect rf cable from AN/USM-207 FREQ A connector.
25.
Reconnect rf cable to Adapter UG-514.
5-24
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