TB 9-6625-2133-24
(3) Adjust function/arbitrary generator frequency for 455 kHz and output to indicate
ALIGN on TI meter. Function/arbitrary generator meter will indicate between 0.2 and 0.4
V.
b. Adjustments. No adjustments can be made.
19. Fine RF Check
a. Performance Check
(1) Disconnect function/arbitrary generator from TEST PROBE tip and connect to
RCVR OUTPUT plug tip.
(2) Set FUNCTION switch to FINE RF.
(3) Adjust function/arbitrary generator frequency for 5 kHz and output for 350 mV.
Meter on TI will Indicate between 1/4 and 3/4 full scale.
(4) Disconnect function/arbitrary generator setup from TI.
b. Adjustments. No adjustments can be made.
20. Output Frequency
a. Performance Check
(1) Position controls as listed in (a) through (c) below:
(a) FUNCTION switch to RCVR ANT.
(b) RCVR TEST SIG control fully cw.
(c) FREQUENCY MC control to 47 MHz.
(2) Connect RCVR ANT jack and ground to frequency counter.
(3) Verify that frequency counter indicates between 46.8 and 47.2 MHz.
(4) Adjust dc power supply for a +10-V dc indication on multimeter and verify
frequency remains in tolerance.
(5) Adjust dc power supply for 12 V dc indication on multimeter and repeat
technique of (3) and (4) above for frequency settings listed in table 3.
Table 3. Output Frequency Accuracy
Test instrument
Spectrum analyzer
frequency MC
indications
dial settings
(MHz)
Min
Max
52
51.8
52.2
57
56.8
57.2
(6) Connect RCVR ANT jack and ground to spectrum analyzer.
(7) Adjust spectrum analyzer for a 47 MHz indication on crt. Establish a frequency
reference on crt.
(8) Disconnect cable from TI and connect to signal generator. Adjust frequency of
signal generator to reference established in (7) above. Signal generator display will
indicate between 46.8 and 47.2 MHz.