Keithley S46, Instruction Manual

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3-16 Document number: S46-901-01 Rev. F / March 2011
Section 3: Operation S46/S46T/S46L Microwave Switch System Instruction Manual
NOTE To prevent all messages from entering the error queue, send the enable
command with the null list parameter:
STATus:QUEue:ENABle()
For more information about these commands, see the specific command listing in the SCPI
command section.
Status byte and SRQ
Service request is controlled by two 8-bit registers: The Status Byte Register and the Service
Request Enable Register.
Figure 3-12 shows the structure for these registers.
Table 3-10
SCPI commands: Error queue
Command Description Default
STATus
:QUEue
[:NEXT]?
:ENABle<lis
t>
:ENABle?
:DIS-
able<list>
:DISable?
:CLEar
STATus subsystem:
Read error queue:
Read and clear oldest error/status message.
Specify error and status messages for error queue.
Read the enabled messages.
Specify messages not to be placed in queue.
Read the disabled messages.
Clear messages from error queue.
(Note 1)
(Note 2)
(Note 2)
SYSTem
:ERRor?
:CLEar
SYSTem subsystem:
Read error queue:
Clear messages from error queue.
(Note 1)
Notes:
1. Turning instrument power on and using
*CLS empties the error queue. STATus:PRESet has
no effect.
2. Turning instrument power on enables error messages and disables status messages.
*CLS and
STATus:PRESet have no effect.