Rohde & Schwarz R&S UPP, User Manual

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Instrument Functions
R&S
®
UPP
494 User Manual 1411.1055.32 ─ 10
The IEC/IEEE bus address of the instrument is factory-set to 20 and can be modified
here. Addresses from 0 to 30 are permissible. For more information, see
Chap-
ter 6.3.1, "Remote Control by IEC/IEEE Bus " , on page 640.
Remote command:
SYSTem:COMMunicate:GPIB:ADDRess
on page 845
Casc Port No
Port number for establishing a cascade connection.
The port number is part of an IP address. If the port numbers from the master and
slave do not match, a connection cannot be established, which is evident by the rapid
flashing of the slave's CASCADE LED. The message "Slave couldn't receive connec-
tion …" appears on the slave's user info line.
The connection log on the master can be viewed to check the process of establishing
the connection. Viewing the log requires that a monitor, mouse and keyboard be con-
nected to the master or slave instrument. Double-clicking in the user info line displays
a box with the history of the self-explanatory error messages.
If the port number is already being used by another tool when the firmware starts, the
error message
"Could not open cascading server port. Please change the cascad-
ing port number." appears. If a connection has already been established between the
master and slave but the port number is also being used by another tool, the error
message
"Cascading data handshake failed. Please consider changing the cas-
cading port number." appears. The remedy in both cases is to modify the port num-
bers on all instruments in the cascade so that they are standardized or uniform. Any
port number from the specified value range can be selected as the new port number.
The problem should be corrected after all instruments have been switched off and back
on.
Remote command:
SYSTem:CASCade:PORTno
on page 844
SCPI update
Determines whether the panels are to be updated during remote control mode
(checked) or not.
For reasons of speed, this update should be switched off . The panels then show the
device status before the change to remote control mode. While generating or testing a
remote control program, it can be useful to enable updating so that you can immedi-
ately see the effect of the remote control commands. Sending each command in a sep-
arate command line with
*OPC?
prevents instabilities. During a complete program run,
the update must be switched off.
Remote command:
SYSTem:DISPlay:SCPiupdate
on page 846
Source
Selection of the screen content to be output.
Config panel