TB 9-6625-2143-24
(d) INPUT SENSITIVITY control to +30 dB.
(e) MANUAL VERNIER control to mid-range.
(2) Set function/arbitrary generator output for 1 kHz and +23.01 dBm.
(3) Adjust FREQUENCY control to near 1000 Hz and press AFC pushbutton.
(4) Adjust amplitude VERNIER control for -5 dB meter indication.
(5) Set function/arbitrary generator frequency to 40 kHz.
(6) Release AFC pushbutton, adjust FREQUENCY control for 40,000 Hz, and
press AFC pushbutton.
(7) Adjust A9C6 (fig. 1) for -5 dB meter indication on TI. (R)
(8) Set AMPLITUDE REF LEVEL control to -10 dB and INPUT SENSITIVITY
control to +20 dB.
(9) Release AFC pushbutton and repeat technique of (2) through (6) above. Adjust
A9C5 (fig. 1) for -5 dB meter indication on TI. (R)
(10) Set AMPLITUDE REF LEVEL control to 0 dB and INPUT SENSITIVITY
control to +10 dB.
(11) Release AFC pushbutton and repeat technique of (2) through (6) above. Adjust
A9C4 (fig. 1) for -5 dB meter indication on TI. (R)
(12) Set function/arbitrary generator amplitude to +13.01 dBm.
(13) Set AMPLITUDE REF LEVEL and INPUT SENSITIVITY control to 0 dB.
(14) Release AFC pushbutton and repeat (3) through (6) above. Adjust A9C3 (fig. 1)
for -5 dB meter indication on TI. (R)
(15) Set function/arbitrary generator amplitude to + 3.01 dB.
(16) Set INPUT SENSITIVITY control to -10 dB.
(17) Release AFC pushbutton and repeat (3) through (6) above. Adjust A9C2 (fig. 1)
for -5 dB meter indication on TI. (R)
a. Performance Check
(1) Remove top outer cover from TI.
(2) Connect multimeter between A1TP1 (+10V) (fig. 1) and chassis ground.
Multimeter will indicate between +9.95 and +10.05 V dc.
(3) Connect multimeter between A1TP2 (10 V) (fig. 1) and chassis ground.
Multimeter will indicate between -9.95 and -10.05 V dc.
b. Adjustments. No adjustments can be made.
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.
15/(16 Blank)