E8257D/67D, E8663D PSG Signal Generators Service Guide 129
Troubleshooting
Troubleshooting Harmonic Spurious
7. If harmonics meet or exceed specification, reconnect the cable to the A29
20 GHz Doubler J2 and remove the cable going to the A30 Modulation
Filter J2 (W31). Connect the spectrum analyzer to the A30 Modulation
Filter J2.
8. Set the signal generator and spectrum analyzer to the harmonic
frequency. On the spectrum analyzer, press marker peak search and delta
marker.
9. Set the signal generator to the fundamental frequency of the harmonic.
10.Using the delta marker, read the harmonic power level on the spectrum
analyzer. Compare the spectrum analyzer reading to the specifications in
Table on page 127.
11.If the harmonics do not meet specification, replace the A30 Modulation
Filter.
32 GHz and 44 GHz Models Only
Use this procedure to troubleshoot harmonic problems with a fundamental
frequency between 10 GHz and 16 GHz for Option 532, and between 10 GHz
and 22 GHz for Option 544.
1. Set the signal generator as follows:
— Frequency: set to harmonic frequency to be measured
— Amplitude: +10 dBm
— ALC Off
— Amplitude Power Search (softkey)
2. Remove the cable from the A37 20–44 GHz Upconverter (W102). Connect
the spectrum analyzer to the A37 20–44 GHz Upconverter (J4).
3. Set the spectrum analyzer to the harmonic frequency, then press peak
search and delta marker.
4. Set the signal generator to the fundamental frequency of the harmonic.
5. Using the delta marker, read the harmonic power level on the spectrum
analyzer. Compare the spectrum analyzer reading to the specifications in
Table on page 127.
6. If the harmonics do not meet specifications, replace the A37 20–44 GHz
Upconverter.
40 GHz Models Only
Use this procedure to troubleshoot harmonic problems with a fundamental
frequency between 2 GHz and 20 GHz
1. Set the signal generator as follows:
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