TB 9-4931-488-24
Table 15. Output Level Accuracy (Option 004).
Test instrument
Measuring receiver indications
OUTPUT LEVEL
OUTPUT LEVEL
Min
Max
1 dB
10 dB
(dB)
(dB)
switch settings
switch settings
-10
0
-12.0
-8.0
-10
-1
-13.0
-9.0
-10
-2
-14.0
-10.0
-10
-3
-15.0
-11.0
-10
-4
-16.0
-12.0
-10
-5
-17.0
-13.0
-10
-6
-18.0
-14.0
-10
-7
-19.0
-15.0
-10
-8
-20.0
-16.0
-10
-9
-21.0
-17.0
-10
-10
-22.0
-18.0
-10
-11
-23.0
-19.0
-10
-12
-24.0
-20.0
-20
0
-22.0
-18.0
-30
0
-32.0
-28.0
-40
0
-42.0
-38.0
-50
0
-52.5
-47.5
-60
0
-62.5
-57.5
-70
0
-72.5
-67.5
-80
0
-82.5
-77.5
-90
0
-92.5
-87.5
-100
0
-102.5
-97.5
-110
0
-112.5
-107.5
b. Adjustments
(1) For TIs with card A4 perform technique of (2) through (7). Others proceed to
technique (8).
(2) Position controls as listed in (a) through (f) below.
(a) FM k/MHz pushbutton pressed.
(b) MODULATION FREQUENCY range switch to FIXED FREQ 1 kHz.
(c) FM switch to OFF.
(d) PEAK DEVIATION switch to 10 kHz.
(e) PEAK DEVIATION vernier control fully ccw.
(f) RANGE MHz switch to 4 - 2.
(3) Connect multimeter INPUT HI to A2TP3 (DC OUTPUT, fig. 1) and INPUT LO to
indication.
(4) Disconnect multimeter from A2TP3 and connect to A4TP1 (fig. 1). Adjust A4R10
(fig. 1) for a 0.000 1 mV dc multimeter indication.
(5) Set FM switch to INT and adjust PEAK DEVIATION vernier control for a
9.766 V dc multimeter indication.
(6) Adjust A4R19 (fig. 1) for a TI meter indication of 10 on 0 to 10 scale.
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