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A15 RF Assembly
The block diagrams for the A14 and A15 assemblies are located in
NOTE
Chapter 11, Synthesizer Section.
Confirming a Faulty Third Converter
1. Perform the "IF Input Amplitude Accuracy" performance test in the
2. If the performance test fails, perform the manual
3. If adjustment cannot be made, disconnect W35 (coax 92) from
4. On the spectrum analyzer, press
5. Connect a signal generator to A15J801.
6. Set the signal generator to the following settings:
7. If a flat line is displayed within 2 dB of the reference level and the
8. If a flat line is displayed within 2 dB of the reference level and the
9. Disconnect the signal generator from A15J801 and reconnect W35.
Confirming Third Converter Output
1. Connect the spectrum analyzer CAL OUTPUT to the INPUT 50Ω
2. Set the spectrum analyzer to the following settings:
Chapter 12
8560 E-Series Spectrum Analyzer Calibration Guide. This exercises
most of the third converter.
Mixer Amplitude Adjustment" on page 147
Amp/2nd IF Align" on page 71
A15J801.
following settings:
Center frequency ................................................... 300 MHz
Span .............................................................................. 0 Hz
Frequency ................................................... 310.7 MHz CW
Power .............................................................................. −28 dBm
performance test passed, troubleshoot microcircuits A7, A8, A9, A10,
A12, and A13.
performance test failed, troubleshoot the 2nd IF distribution
circuitry on the A15 RF assembly.
connector.
Center frequency .................................................. 300 MHz
Span .............................................................................. 0 Hz
Input attenuation ....................................................... 10 dB
"13. External
or the automated
of this manual.
and set the controls to the
PRESET
RF Section
A15 RF Assembly
"6. 3rd
621
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