Keysight Agile Signal Generator Service Guide 53
Troubleshooting
Troubleshooting Harmonic Spurious by Fundamental Frequency
Harmonic spurious problems will most likely be associated with the A16
(Frequency Multiplier), A17 (Agile Mod/Filter), A18 (Low Band Output Module),
or A19 (40 GHz Doubler) if Option 540 is installed.
The harmonics levels listed in Table 1-6 can be measured to isolate and verify
the faulty assembly.
Front panel power setting is 10 dBm, the frequency is dependent on the test
points. The power at each test point is typically less than front panel power.
Keep the front panel power setting at 10 dBm at all times while making the
measurement.
Table 1-5 Harmonic Spurious
Failed Frequency Most Likely Cause
Low Band: 0.01 − 3 GHz A18 Low Band Output Module
High Band: > 3 − 20 GHz A16 Frequency Multiplier
Both Bands: 0.01 − 20 GHz
(Option 520)
A17 Agile Mod/Filter
Both Bands: 0.01 − 40 GHz
(Option 540)
A19 40 GHz Doubler
Table 1-6 Harmonic Spurious Measurement Points
Frequency Test Point Second and Third Harmonics Level
10 − 1430 MHz A14J1 < −45 dBc
1.43 − 3 GHz A14J2 < −45 dBc
The frequency at this test point is 1/2
of the front panel setting.
10 − 1000 MHz A17J5 < −40 dBc
> 1 − 2 GHz A17J5 < − 50 dBc
> 2 GHz A17J5 < −55 dBc
10 − 1000 MHz A18J4 < −45 dBc
> 1 − 2 GHz A18J4 < −50 dBc
> 2 − 3 GHz A18J4 < −55 dBc
For Option 540
10 − 1000 MHz A19 output < −40 dBc
> 1 − 2 GHz A14 output < −50 dBc
> 2 GHz A14 output < −55 dBc
To Next Page
Loading...
Need help?
General
