TB 9-6625-2079-24
Figure 1. Test instrument left-side view - adjustment location.
(2) Replace assembly cover.
9. Display Meter and Audio Circuits
a. Performance Checks
(1) Connect synthesized signal generator RF Output to TI RF IN and connect
multimeter to TI DC OUT (rear panel of TI).
(2) Position synthesized signal generator controls as listed in (a) through (e) below:
(a)
Frequency Control set to 100 MHz.
(b)
Level Control set to 0.0 dBm.
(c)
FM to On.
(d)
FM Rate set to 1 kHz.
(e)
FM Deviation set to 100 kHz.
(3) Set synthesized signal generator RF output on and adjust synthesized signal
generator FM Deviation for TI display indication of 100.0 kHz. If multimeter does not
indicate between .999 and 1.001 V dc, perform b (1) below.
(4) Set synthesized signal generator FM Rate to 19 kHz. Record display indication.
(5) Press TI HIGH-PASS (Hz) 10 pushbutton. If TI does not indicate within 1
count of value recorded in (4) above, perform b (2) below.
(6) Press TI pushbuttons as listed in (a) through (d) below:
HIGH-PASS (Hz) to 3000.
(a)
LOW-PASS (kHz) to 3.
(b)
PEAK to +.
(c)
RANGE to 300.
(d)
(7) Set synthesized signal generator FM off.
If multimeter does not indicate
between -0.0003 and +0.0003 V dc, perform b (3) below.
(8) Press PEAK - pushbutton. If multimeter does not indicate between -0.0003 and
+0.0003 V dc, perform b (4) below.