Troubleshooting 7-3 Operating Problems
Model MS20xxB MM PN: 10580-00303 Rev. D 7-3
Spectrum Analyzer Problems
Lock Error Message
1. Spectrum Analyzer PCB Assembly may have failed or may have been damaged. Replace the Spectrum
Analyzer Assembly for MS203xB.
Measurement Problems
1. Inspect the Spectrum Analyzer RF In connector for damage.
2. Refer to the User Guide and Measurement Guide.
3. Update Firmware.
4. Spectrum Analyzer PCB Assembly may have failed or may have been damaged. Replace the Spectrum
Analyzer Assembly for MS203xB
Option 10, VNA Bias Tee Problems
1. Verify that the load current of the attached device does not exceed the current capability of the
VNA Master.
2. Perform an operational test. Refer to Section 4-2 “VNA Mode Bias Tee (Option 10) Operational Check”
on page 4-2.
3. Main PCB Assembly may have failed or may have been damaged. Replace the Main/VNA PCB Assembly
for MS202xB or the Main/VNA/DSP PCB Assembly for MS203xB.
Option 31, GPS Problems
Unable to Acquire GPS Fix
1. Verify that the GPS Antenna is in direct line-of-sight relationship or is placed outside without any
obstructions.
2. If the Anritsu 2000-1528-R GPS Antenna is used, attached the antenna to a large magnetic metal surface
such as the roof on a passenger car.
3. Inspect the GPS connector for damage.
4. GPS Receiver Module may have failed. Replace GPS Receiver Module.
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