E8257D/67D, E8663D PSG Signal Generators Service Guide
Troubleshooting
Troubleshooting Harmonic Spurious
1-80
5. Using the delta marker, read the harmonic power level on the spectrum analyzer. Compare the spectrum analyzer
reading to the specifications in Table 1- 27 on page 1- 78.
6. If harmonics do not meet specification, replace the A29 20 GHz Doubler.
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 1- 27 on page 1- 78.
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 1- 27 on page 1- 78.
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:
• Frequency: set to harmonic frequency to be measured
• Amplitude +10 dBm
•ALC Off
• Amplitude Power Search (softkey)
2. Remove the cable from the A30 Modulation Filter J2 (W31). Connect the spectrum analyzer to
A30 Modulation Filter J2.
3. Set the spectrum analyzer to the harmonic frequency and press marker peak search and delta marker.
4. Set the signal generator frequency 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 1- 27 on page 1- 78.
6. If the harmonics do not meet specification, replace the A30 Modulation Filter.
7. If the harmonics meet or exceed specification, reconnect the cable to the 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.
8. Set the signal generator and spectrum analyzer to the harmonic frequency. Press marker peak search and delta
marker.
9. Set the signal generator to the fundamental frequency of the harmonic.
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