Rohde & Schwarz FPL1000 Series, User Manual

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Troubleshooting
R&S
®
FPL1000
860 User Manual 1178.3370.02 ─ 03
3. On the remote channel performing the measurement, send the SCPI command
ABORt
to abort the current measurement and reset the trigger system.
4. If the R&S FPL still does not react to the remote commands, switch it off and back
on.
Ignored commands
When a remote command attempts to define incompatible settings, the command is
ignored and the instrument status remains unchanged, i.e. other settings are not auto-
matically adapted. Therefore, control programs should always define an initial instru-
ment status (e.g. using the *RST command) and then implement the required settings.
Detecting false commands
If a remote program does not provide the expected results and you are using a GPIB
connection, you can log the commands and any errors that may occur. To activate the
SCPI error log function, in the "N Remote" dialog box, in the "GPIB" tab, select
"I/O Logging" .
All remote control commands received by the R&S FPL1000 are recorded in the follow-
ing log file:
C:\ProgramData\Rohde-Schwarz\ZNL-FPL\ScpiLogging\ScpiLog.txt
Logging the commands may be extremely useful for debug purposes, e.g. in order to
find misspelled keywords in control programs. However, remember to turn off the log-
ging function after debugging to avoid unnecessary access to the hard drive and use of
storage space.
10.4 Miscellaneous Troubleshooting Hints
Power levels for low frequency signals not correct ..................................................... 860
Invalid trace display .....................................................................................................860
Data capturing takes too long ..................................................................................... 861
Multiple user access to one instrument .......................................................................861
Web browser access to instrument fails .....................................................................861
The transducer factors/limit lines applied to my measurement are different to those dis-
played in the Transducer / Lines dialog box
................................................................861
Power levels for low frequency signals not correct
By default, the R&S FPL1000 uses AC coupling for RF input. For very low frequencies,
the input signal may be distorted with this setting. In this case, use DC coupling
instead. To change the setting, select INPUT/OUPUT > "Input Source Config" > "Radio
Frequency" > "Input Coupling" > "DC" .
Invalid trace display
If output to the IF 2 GHZ OUT connector is activated, the measured values are no lon-
ger sent to the display; thus, the trace data currently displayed on the R&S FPL1000
becomes invalid. A message in the status bar indicates this situation.
Miscellaneous Troubleshooting Hints