412 Chapter10
Analyzer Options and Block Diagrams
Tracking Generator 8593E, 8594E, 8595E, 8596E Option 010
6. Place the A3 front end assembly in its service position. Place the
A3A15 tracking generator assembly in its service position.
Disconnect W41 from A3A15J4 (LO IN). Connect the power sensor to
the free end of W41. Repeat the LO OUTPUT power level check
above, noting the center frequency settings at which the power level
is out of tolerance. The power level for this check should be
+16.5 dBm ±2 dB.
• If the power level is within tolerance at W41, but out of tolerance
at the LO OUTPUT (rear panel), and the center frequency setting
of the out-of-tolerance power levels is close to the frequencies at
which the output is unlevelled, suspect A3A15.
• If the power level at W41 is also out of tolerance, suspect either
the A3A14 LODA assembly, A3A7 YTO assembly, or W41. Refer
to the “LO Section” information in Chapter 9.
7. If the output is unlevelled only at certain power level settings or
certain frequencies, monitor A10J1 pin 8 with a DVM. Connect the
negative DVM lead to A7JTP1. Vary the SRC POWER setting or center
frequency setting, as appropriate, and plot the voltage variation
versus power level or frequency. A discontinuity in the plot near the
frequency or power level at which the output is unlevelled indicates
a problem on the A10 tracking generator control assembly.
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