Troubleshooting
Troubleshooting Harmonic Spurious
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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. The harmonic level
should be ≤-55 dBc.
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.
10.Using delta marker, read the harmonic power level on the spectrum analyzer. The harmonics should be
<−45 dBc the signal generator’s specification.
11.If the harmonics do not meet specification, replace the A27 40 GHz Doubler.
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