TB 9-6625-2143-24
(6) Set FREQ SPAN control to 50 kHz and adjust A3R2 (fig. 1) for 10 Hz indication
on TI display. (R)
(7) Set SWEEP MODE control to MAN and MANUAL VERNIER control fully ccw.
(8) Adjust FREQUENCY control for 0 Hz indication on TI display.
(9) Connect multimeter to A2TP4 (fig. 1) and adjust A2L1 (fig. 1) for multimeter
indication between -1.49 and -1.51 V dc. (R)
(10) Position MANUAL VERNIER control fully cw.
(11) Adjust FREQUENCY control for 50,000 Hz indication on TI display.
(12) Adjust A2R100 (fig. 1) for -1.5 V indication on multimeter. (R)
a. Performance Check
f
output to TI INPUT using a 50
(1) Connect synthesizer level generator 50
eedthrough termination.
(2) Position controls as listed in (a) through (e) below:
SCALE LOG 90 dB pushbutton pressed.
(a)
AFC pushbutton released.
(b)
INPUT SENSITIVITY to 0 dB.
(c)
VERNIER (amplitude) control to CAL.
(d)
(e)
(3) Set synthesizer level generator output for 10 kHz and +13.01 dBm (l V rms, 0 dBV).
(4) Adjust FREQUENCY control for indication near 10,000 Hz and press AFC pushbutton.
(5) Adjust amplitude VERNIER control for full-scale meter indication.
(6) Set synthesizer level generator for 10 dB step increase/decrease.
(7) Step synthesizer level generator to +3.01 dBm (0.3162 V rms) output. If TI
meter does not indicate between -8 and -12 dB, perform b (l) through (39) below.
(8) Repeat technique of (7) above for outputs and indications listed in table 5. Use
step function on synthesizer level generator. If any indication listed is not within the limits
specified, perform b (1) through (39) below:
NOTE
If AFC unlocks when amplitude setting is changed, release
AFC pushbutton, retune to 10,000 Hz, and press AFC
pushbutton. For the -80 dB measurement release the AFC
pushbutton and manually tune for a peak meter reading.