TB 9-4931-488-24
b. Adjustments
(1) Position controls as listed in (a) through (d) below:
(a) AM X10% pushbutton pressed.
(b) AM switch to OFF.
(c) MODULATION FREQUENCY range switch to FIXED FREQ 1 kHz.
(d) AM control fully ccw.
(2) Connect multimeter INPUT HI to A2TP3 (DC OUTPUT, fig. 1) and INPUT LO
0.000 1 mV dc.
(3) Disconnect multimeter INPUT HI from DC OUTPUT, A2TP3, and connect
(4) Adjust A2R14 (METER OFFSET, fig. 1) for multimeter indication of
0.000 1 mV dc.
(5) Disconnect multimeter INPUT HI from A2TP4 (METER ADJ, fig. 1) and
(6) Set AM switch to INT and adjust AM control for a multimeter indication of
0.707 V ac. Adjust A2R29 (METER DRIVE, fig. 1) for TI meter indication of 10 on a
0 to 10 scale.
R28
Figure 1. Test Instrument - Top Left Hand Side.
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