WILLTEK 4400 Mobile Phone Tester Series, Руководство пользователя

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Appendix A SCPI Command Reference
Common commands
4460 GSM System Option and 4468 EDGE System Option Version 12.20
379
Commands affecting the
service register
The service register represents the highest level within the report structure of the
4400.
The service register contains eight bits.
If any one of the bits 0...5 or 7 is set, the summary status bit (bit 6) of the service
register will be set as well.
NOTE
The service register is self-destructive. This means that its contents will be
cleared after reading.
Bit Decimal Meaning
7 128 OPERational status summary. When this bit is set, an
event within the
“General operation register group”
(e.g. the 4400 is waiting for a trigger) passed all fil-
ters.
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
S ervice R e Q uest 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.