Troubleshooting
6-5 Troubleshooting Test – VNA Source and LO Power Level Check
VectorStar ME7838 Series MM
PN: 10410-00306 Rev. F
6-5
LO1 Port Output Level Check
9.
On the VNA, set CW Frequency to 54 GHz.
10.
Connect the 34NKF50 Adapter to the Spectrum Analyzer
RF In
port.
11.
Connect a RF cable between the Adapter at the Spectrum Analyzer
RF In
port and the
LO1
port of the
MS464xx VNA.
12.
On the Spectrum Analyzer, set the Reference Level to
15 dBm, Start frequency to 4 GHz and Stop
frequency to 11 GHz.
13.
On the VNA, vary the CW Frequency and monitor the output with the Spectrum Analyzer to see if the
power level is >
3.2 dBm.
14.
If the output is unexpectedly low, the fault lies in the MS464xx VNA.
LO2 Port Output Level Check
15.
Disconnect the RF Cable from the
LO1
port of the VNA and connect it to the
LO2
port.
16.
Set CW frequency to 54 GHz.
17.
Vary the CW Frequency and monitor the output with the Spectrum Analyzer to see if the power level is
>
3.2 dBm
18.
If the output is unexpectedly low, the fault lies in the MS464xx VNA.
180 GHz
15 GHz
0 dBm
220 GHz
16.67 GHz
0 dBm
Note
The LO frequency varies between 5 and 10 GHz.
Table 6-1.
Expected VNA RF Output Level (2 of 2)
VNA Set Freq
RF Port Output Freq
Expected Power Level
Summary of Contents for VectorStar ME7838 Series
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