TB 9-6625-2004-35
(8) Set synthesized signal generator FM modulation frequency for 20 kHz full scale
indication on TI DEVIATION meter. If measuring receiver does not indicate between 19.25
and 20.75 kHz deviation, perform b below.
(9) Repeat technique of (2) through (8) above for control settings and indications
listed in table 5. If measuring receiver does not indicate within limits specified, perform b
below.
Table 5. Frequency Deviation
Synthesized signal
Measuring
Test instrument
generator
receiver
indications
FREQUENCY
FREQUENCY
DEVIATION
DEVIATION
FREQUENCY
MOD
(kHz)
MC
RANGE-KC
RANGE-MC
meter
FREQ
(MHz)
dial settings
switch
switch
indications
(kHz)
Min
Max
settings
settings
(kHz)
55-150
100
50
50
100
1
48
52
120-250
200
100
100
200
1
95
105
250-500
400
300
300
400
1
285
315
3001
500-1000
750
1000
750
1
200
400
1Deviation
limitation of measuring receiver.
b. Adjustments
(1) Set FREQUENCY RANGE-MC switch to 55-120 and DEVIATION RANGE-
KC switch to 50.
(2) Set synthesized signal generator for a 100 MHz CW output.
(3) Adjust FREQUENCY-MC dial for a 0 indication on TI CARRIER SHIFT meter.
(4) Set synthesized signal generator MOD FREQ for a 1 kHz indication on
measuring receiver frequency counter.
(5) Set synthesized signal generator FM controls for a 50 kHz deviation indication
on measuring receiver.
(6) Adjust CAL ADJUST (front panel) for a 50 kHz indication on TI DEVIATION
meter (R).
(7) Repeat a above.
12. Audio Output
a. Performance Check
(1) Connect multimeter to AUDIO OUTPUT.
