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Diagnostics
Troubleshooting the 2.7 GHz RF signal path
Troubleshooting the 2.7 GHz RF signal path
The following procedures direct you through inserting a signal at various points in
the analyzer's signal path to isolate problems to a specific module. Perform the
steps in the order listed.
This test requires a signal generator. See,
224).
To troubleshoot the 2.7 GHz RF signal path:
1. Set up the analyzer as follows:
a. If it is not already running, start the Vector Signal Analyzer by double
clicking the icon or clicking Start > (All) Programs > Agilent 89600 VSA
> Vector Signal Analyzer.
b. Click File > Preset > Preset Setup.
c. Click Utilities > Calibration, and clear the Apply Corrections to Data
checkbox.
d. Click MeasSetup > Frequency Bands > 36 MHz – 2.7 GHz.
e. Disconnect the BNC cable from the E1439 Analog In connector and
connect a signal generator to E1439 Analog Input.
f. Set the signal generator for 70 MHz, –10 dBm output.
g. Set the analyzer's marker to peak by right clicking on the spectrum trace
and clicking ↑Peak.
The marker reading should be 20 dBm ± 1.5 dB.
h. Verify the other settings in the following table.
Input Range
+20 dBm
–35 dBm
–40 dBm
–45 dBm
If any of the readings are incorrect, the E1439 module is most likely faulty.
2. Reconnect the BNC cable to the E1439 Analog In and disconnect the SMA
cable from the 89605 From 70 MHz IF Out connector. Connect the signal
generator output to 89605 From 70 MHz IF Out.
a. Set the marker to peak by right clicking on the spectrum trace and clicking
↑Peak.
240
"Recommended Test Equipment" (page
Signal Generator Level
–10 dBm
–20 dBm
–20 dBm
–20 dBm
Marker Level
+20 dBm ± 1.5 dB
–40 dBm ± 1.5 dB
–40 dBm ± 1.5 dB
–40 dBm ± 1.5 dB
Chapter 16
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Table of Contents
Troubleshooting
