A SERVICE OF

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TM 11-6625-1614-15
Model 410C
k. Vary RF signal generator frequency from 10 Mc to 480 Mc.
Model 410C should read between 0.40 to 0.50 v at all frequencies.
l.
If power meter pointer varies from reference determined in
step j
above, readjust RF signal generator OUTPUT LEVEL to return
pointer to reference deflection.
m.
To check Model 410C frequency response from 480 Mc to 700
Mc, replace RF signal generator with VHF Signal Generator (H-P
Model 612A) and repeat steps i
through m above. Model 410C
should not vary more than ±10% from reference.
5-26. ADJUSTMENT AND CALIBRATION PROCEDURE.
5-27. The following is a complete adjustment and calibration
procedurE for the Model 410C.
These operations should be conducted
only if it has previously been established by Performance Checks,
Paragraph 5-5, that the Model 410C is out of adjustment.
Indiscriminate adjustment of the internal controls to “refine
settings may actually cause more difficulty.
If the procedures
outlined do not rectify any discrepancy that may exist, and all
connections and settings have been rechecked, refer to Paragraph
5-36, Troubleshooting, for possible cause and recommended corrective
action.
5-28. CHOPPER
FREQUENCY ADJUST.
a. A Voltmeter Calibrator (H-P Model 738BR) and an Electronic
Counter (H-P Model 52lC) and an AC Voltmeter (H-P Model 3400A)
will be required.
5-8