Rohde & Schwarz ESW Series, User Manual

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Troubleshooting
R&S
®
ESW
728 User Manual 1177.6298.02 ─ 08
C:\Program Files
(x86)\Rohde-Schwarz\ESW\<version>\ScpiLogging\ScpiLog.<xx>
where <xx> is a consecutive number, starting with 00;
A new file is created each time you stop and restart the logging function. The lowest
available number is used for the <xx> extension.
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.
17.4 Miscellaneous Troubleshooting Hints
Power levels for low frequency signals not correct ..................................................... 728
Invalid trace display .....................................................................................................728
Data capturing takes too long ..................................................................................... 728
Multiple user access to one instrument .......................................................................729
Web browser access to instrument fails .....................................................................729
The transducer factors/limit lines applied to my measurement are different to those dis-
played in the Transducer/Lines dialog box
..................................................................729
Power levels for low frequency signals not correct
By default, the R&S ESW 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
longer sent to the display; thus, the trace data currently displayed on the R&S ESW
becomes invalid. A message in the status bar indicates this situation.
Data capturing takes too long
Spectrum application only.
Particularly for FFT sweeps, the time required to process the data may be considerably
longer than the time required to capture the data. Thus, if you only consider the defined
sweep time, you may assume an error has occurred if the measurement takes longer
than expected.
However, while the sweep time only defines the time in which data is actually captured,
the total sweep
duration includes the time required for capturing and processing the
data. Thus, for FFT sweeps in the Spectrum application, the sweep duration is now
also indicated in the channel bar, behind the sweep time. In remote operation, the esti-
mated sweep duration can be queried for all sweep modes (also zero span and fre-
quency sweeps).
Tip: To determine the necessary timeout for data capturing in a remote control pro-
gram, double the estimated time and add 1 second.
Miscellaneous Troubleshooting Hints