Appendix A SCPI Command Reference
Common commands
264 WCDMA Options Version 6.20
*SRE
6 64 Summary status bit. This bit will always be set as
soon as any other bit of the service register has been
set.
Note: The summary status bit may be ANDed with
the service request enable filter in order to generate
a Service ReQuest on GPIB. The related command is
*SRE (see below for details).
5 32 Event status summary. When this bit is set, an event
within the “Event status register group” (e.g. an error
occurred) passed all filters.
4 16 Message available. This bit will be set to
1 as soon as
a query has been completed and measurement
result(s) are available.
3 8 QUESTionable status summary. If this bit is set, an
event within the “General questionable status regis-
ter group” (e.g. 'value out of range') passed all filters.
2 4 Error queue status. When this bit is set, the error
queue contains error messages. Up to 10 error mes-
sages can be logged in the error queue. The error
queue can be read out, using the :SYSTem:ERRor?
command.
1 2 Remote command completed. This bit will be set to
1 after a remote (SCPI) command has been com-
pleted.
Note: However, when the 4400 receives a SCPI com-
mand, it will block the GPIB until the command has
been completed.
0 1 Message queue status.
This bit will be set to
1 as soon as a message is avail-
able in the 4400's internal message queue. Up to
10 messages can be logged in the message queue. To
write to or to read from the message queue, use the
:SYSTem:MESSage command.
Syntax
:*SRE <int1>
Parameters
int1 is an integer. The valid range is from 0 to 255 (8 bits).
Description
Sets the enable filter (mask) for the service register.
int1 is the decimal representation of this binary mask.
The mask and the current content of the service register will be ANDed. If the result is
not zero, a service request (SRQ) will occur on the GPIB.
Query
The query form reads out the mask currently set and returns its binary representation
in a string.
Example
:*SRE 68
As soon as an error occurs, bits 2 and 6 of the service register will be set. ANDed with
the mask (68), a binary 1 will be the result and a SRQ will occur on the GPIB.
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