Rohde & Schwarz R&S UPP, User Manual

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Cascading
R&S
®
UPP
871 User Manual 1411.1055.32 ─ 10
TRACe:FFT:LOAD:AY?
Possible response: " -119.95,-118.828,-119.796,-121.799,-122.835,…"
CASC:ASS SLAVE02
TRACe:FFT:LOAD:AY?
Possible response: " -123.181,-118.682,-117.495,-119.492,-121.138,…"
CASC:ASS ALL
CASCade:ASSignment MASTer
Query commands that are issued in this operating mode always return only a single
query response. The channel specification for channel
‑
related commands must be
≤
8,
otherwise an error message is output.
CASCade:ASSignment SLAVexx
Query commands that are issued in this operating mode always return only a single
query response. The channel specification for channel
‑
related commands must be
≤
2
for R&S UPP200,
≤
4 for S UPP400 and
≤
8 for R&S UPP800, otherwise an error mes-
sage is output.
8.7.3.3 SYST:ERR? Query Command
CASCade:ASSignment ALL
Commands are forwarded by the master to all slaves.
Whenever an error message occurs in a slave, it is sent to the master by an asynchro-
nous event mechanism, without intervention by the user. All error messages therefore
accumulate in the master, i.e. its own messages and those of the slaves.
The error queue is read out using the
SYST:ERR?
command.
Example:
With
CASCade:ASSignment ALL
, followed by
INPut:TYPe UNBal
, a command
that does not exist for the R&S UPP is sent to all instruments in the cascade.
All instruments in the cascade generate an "Invalid character data" error.
The
SYST:ERR?
command now reads out the error queue of the master.
Example of a response: -141,"Invalid character data;INPUT:TYPE UNBAL"
This error message can occur multiple times, depending on the number of instruments
in the cascade.
CASCade:ASSignment MASTer
Commands are not forwarded by the master to the slaves; the
SYST:ERR?
command
therefore only shows errors that occurred in the master.
Remote Control