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Digitizers Command Reference 113Chapter 3
*SRE and *SRE?
*SRE <unmask> specifies which bits of the Status Byte Register are
enabled (unmasked) to generate an IEEE-488.1 service request. Event
and summary bits are always set and cleared in the Status Byte Register
regardless of the <unmask> value. A "1" in a bit position enables service
request generation when the corresponding Status Byte Register bit is set
and a “0” disables it. For example, *SRE 16 enables a service request on
Message Available bit (bit 4).
unmask is the sum of the decimal weights of the bits to be enabled allowing
these bits to pass through to the summary bit RQS (bit 6 in the Status Byte
Register). *SRE? returns the current enable <unmask> value.
Parameters
Comments
Executable when initiated: YES
Coupled command: NO
Reset (*RST) condition: unaffected
Power-On condition: no bits are enabled
*STB?
*STB? returns the value of the Status Byte Register. The RQS bit (bit 6 in the
Status Byte Register having decimal weight 64) is set if a service request is
pending.
Comments Executable when initiated: YES
Coupled command: NO
Related commands: *SRE
Reset (*RST) condition: none
Name Type Range of Values Default Value
unmask numeric 0 through 255 None