Maintenance—492/492P Service Vol. 1 (SN B030000 & up)
Fig. 4-16. Typical response when the first and second resona
tors of the 829 MHz filter are adjusted correctly.
diode or the oscillator transistor for the 2182 MHz Oscillator
is replaced and the oscillator frequency is beyond adjust
ment with the frequency adjust tab, described in this proce
dure, the circuit board must be replaced.
Even though replacement boards are precalibrated at the
factory and repair can be accomplished by replacing the
2727-160
Fig. 4-17. Typical response when the third and fourth resona
tors are tuned correctly.
board, we recommend sending the instrument or assembly
to your Tektronix Service Center for repair.
The 2182 MHz Phaselocked 2nd LO should only require
calibration when a component within the assembly has been
replaced. This procedure is in two parts, the LO section and
the phaselock section. Equipment required to calibrate the
LO section is listed in Table 4-3 and the equipment required
to calibrate the phaselock section is listed in Table 4-4.
4-26
REV JUN 1983
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