Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide 143
Troubleshooting
Unleveled Issues
be calculated by dividing the signal generator output frequency by the
multiplier that it uses. The multipliers for the different frequency ranges in
this band are listed in Table 6-3.
8. Calculate the spectrum analyzer center frequency by dividing the signal
generator output frequency by the corresponding multiplier listed in
Table 6-3.
Example:
Signal generator frequency = 12 GHz
Multiplier = 4
Spectrum Analyzer Center Frequency = 12 GHz ÷ 4 = 3 GHz
9. Tune the center frequency of the spectrum analyzer to the calculated
frequency.
10.Verify that the power level of the signal on the spectrum analyzer is at
least -5 dBm:
— If the power level of the signal is not at least -5 dBm replace the A3
RF assembly.
— If the power level of the signal is at least -5 dBm replace the A7
Micro-Deck assembly.
External Leveling
Before attempting to troubleshoot an external unlevel condition verify that the
internal leveling is working properly. If there is an internal unlevel condition
resolve that issue first. If an external unlevel condition persists, use the
following procedure to resolve the unlevel condition.
To replicate and troubleshoot an external leveling condition, use the following
procedure. This procedure makes use of the internal crystal detector and
coupler since they are not needed when external leveling is used.
1. Referring to Figure 6-4, remove W31 from the output of the A7A6 detector.
2. Using an SMB female to BNC male cable (or some equivalent combination
of cables and adapters), connect the A7A6 detector output to the rear
panel ALC IN connector.
Table 6-3 A7 Micro-Deck Frequency Multipliers
Frequency Range Multiplier
3.2 GHz to 5 GHz 1
>5GHz to 10 GHz 2
>10 GHz to 20 GHz 4
>20 GHz to 40 GHz 8
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