1-82
Troubleshooting
Troubleshooting Harmonic Spurious
•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. 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.
To Next Page
Loading...
