TB 9-6625-2071-24
11. Channel C Sensitivity (Option 030, AN/USM-459, and 5328AF096)
a. Performance Check
(1) Connect signal generator OUTPUT RF to TI CHANNEL C input.
(2) Set FUNCTION switch to FREQ C and FREQ RESOLUTION, N switch to
.1 kHz, 104.
(3) Set signal generator for outputs listed in table 10. Slowly increase signal
generator amplitude until TI indication is stable. If adjusted signal generator amplitude
exceeds limits specified, perform b below.
Table 10. Channel C Sensitivity.
Signal generator
Adjusted signal generator
output
amplitude
(MHz)
(mV)
(mV)
≤15
100
1.0
≤15
5
1.0
≤15
512
1.0
≤15
1
30
1.0
≤15
1
500
1.0
AN/USM-459 and 5328AF096 only.
1
b. Adjustments
NOTE
For serial number prefix 2138A and greater containing A8
board number 05328-60045, perform only b (3) below.
(1) Set signal generator for a 100 MHz, 15 mV output. Adjust A8R82 (fig. 1) until
TI indication is stable at approximately 100 MHz. Slowly decrease signal generator
amplitude while adjusting A8R82 (fig. 1) until maximum sensitivity is obtained.
(2) Set signal generator for a 500 MHz, 15 mV output. Adjust A8R85 (fig. 1) until
TI indication is stable at approximately 500 MHz. Slowly decrease signal generator
amplitude while adjusting A8R85 (fig. 1) until maximum sensitivity is obtained.
(3) Set signal generator for a 100 MHz, 15 mV output. Adjust A8R12OFST (fig. 1)
until TI displays a stable indication at approximately 100 MHz. Slowly decrease signal
generator amplitude while adjusting A8R12OFST (fig. 1) until maximum sensitivity is
obtained.
12. Digital Voltmeter (Option 021)
a. Performance Check
(1) Position controls as listed in (a) through (e) below:
FUNCTION switch to DVM.
(a)
FREQ RESOLUTION, N switch to 1Hz, 106.
(b)
DCV RANGE switch to AUTO.
(c)
FILTER switch to OFF.
(d)
READ A and READ B pushbuttons out.
(e)
