Troubleshooting
R&S
®
FSVA3000/ R&S
®
FSV3000
1216
User Manual 1178.8520.02 ─ 01
Incompleted sequential commands - blocked remote channels
If a sequential command cannot be completed, for example because a triggered sweep
never receives a trigger, the remote control program will never finish and the remote
channel to the R&S
FSV/A is blocked for further commands. In this case, you must
interrupt processing on the remote channel in order to abort the measurement.
To regain control over a blocked remote channel
Usually, if you wait a minute for the VISA connection to detect the lost connection and
clear the control channel by itself, you can then re-establish the connection again. If
this fails, try the following:
1. Press "Local" on the front panel of the R&S
FSV/A to return to manual operation (if
not disabled). Then re-establish the connection.
2. Send a "Device Clear" command from the control instrument to the R&S
FSV/A to
clear all currently active remote channels. Depending on the used interface and
protocol, send the following commands:
●
Visa
:
viClear()
●
GPIB
:
ibclr()
●
RSIB
:
RSDLLibclr()
The remote channel currently processing the incompleted command is then ready
to receive further commands again.
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
FSV/A 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
FSV/A are recorded in the following
log file:
C:\Program
Files\Rohde-Schwarz\FSV3000\<version>\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-
Troubleshooting Remote Operation
