50 And 67 Ghz Models Only - Keysight Technologies E8257D Service Manual

Troubleshooting
Troubleshooting Harmonic Spurious
2. Remove the cable from the A30 Modulation Filter J2 (W31). Connect the
3. Set the spectrum analyzer to the harmonic frequency and press marker
4. Set the signal generator frequency to the fundamental frequency of the
5. Using the delta marker, read the harmonic power level on the spectrum
6. If the harmonics do not meet specification, replace the A30 Modulation
7. If the harmonics meet or exceed specification, reconnect the cable to the
8. Set the signal generator and spectrum analyzer to the harmonic
9. Set the signal generator to the fundamental frequency of the harmonic.
10.Using delta marker, read the harmonic power level on the spectrum
11.If the harmonics do not meet specification, replace the A27 40 GHz

50 and 67 GHz Models Only

Use this procedure to troubleshoot harmonic problems with a fundamental
frequency between 20 GHz and 25 GHz for Option 550, and between 20 GHz
and 33.5 GHz for Option 567.
1. Set the signal generator as follows:
130
— Frequency: set to harmonic frequency to be measured
— Amplitude +10 dBm
— ALC Off
— Amplitude Power Search (softkey)
spectrum analyzer to
A30 Modulation Filter J2.
peak search and delta marker.
harmonic.
analyzer. Compare the spectrum analyzer reading to the specifications in
Table on page 127.
Filter.
A30 Modulation Filter J2 and remove the cable going to A27 40 GHz
Doubler output (W30). Connect the spectrum analyzer to the A27 40 GHz
Doubler J2.
frequency. Press marker peak search and delta marker.
analyzer. Compare the spectrum analyzer reading to the specifications in
Table on page 127.
Doubler.
— Frequency: set to harmonic frequency to be measured
— Amplitude +10 dBm
— ALC Off
— Amplitude Power Search (softkey)
E8257D/67D, E8663D PSG Signal Generators Service Guide