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 TM 11-6625-2975-40
2-19. AUDIO LEVEL
ALINEMENT. (CONT)
NOTE
30 Hz VAR TONE/SELECT key remains lit.
7.
Adjust A2A2R3 until differential voltmeter indicates 1.022 0.002 v rms.
8.
Turn A2A2R6 fully clockwise.
9.
Extinguish 30 Hz VAR TONE SELECT key.
10.
Press (to light) 9980 FM TONE SELECT key.
11.
Adjust A2A2R2 for 1.040 0.002 v rms.
12.
Adjust A2A2R6 for 1.000 0.001 v rms.
13.
Extinguish 9960 FM TONE SELECT key.
14.
Press (to light) 30 Hz VAR TONE SELECT key.
15.
Adjust A2A2R9 for 1.000 0.001 v rms.
16.
Extinguish 30 Hz VAR TONE SELECT key.
Press (to light) 1020 Hz TONE SELECT key,
17.
18.
Adjust A2A2R10 or 1.000 0.001 v rms.
19.
Enter Iocalizer frequency 108.10 MHz into test set.
Alternately light and extinguish 150 Hz and 90 Hz TONE SELECT keys, so that only one key
20.
is lit at one time. After each key (tone) change, adjust A2A2R7 until differential voltmeter
indicates 150 Hz voltage is within 50 rms of 90-Hz voltage,
21.
Select 150 Hz TONE SELECT key only.
Adjust A2A2R4 for 1.000 0.001 v rms. Record exact voltage.
22.
Extinguish 150 Hz TONE SELECT key.
23.
Press (to light) 90 Hz TONE SELECT key. If differential voltmeter does not indicate 1.000
24.
*0.001 v rms and is not within 50 v rms of voltage recorded in step 22, repeat steps 20
through 24.
25.
Extinguish 90 Hz TONE SELECT key.
Press (to light) 1020 Hz TONE SELECT key.
26.
27.
Adjust A2A2R5 until differential voltmeter indicates 1.5000 0.0015 v rms.
28.
Turn off test set and remove differential voltmeter.
2-33
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