Srqmask - Racal Instruments 1260 Series User Manual

SRQMASK

Operation 3-14
SRQMASK <32|33......254|255>
This command controls the circumstances under which the Option
01 will cause a VXI/GPIB Resource Manager to assert SRQ by
masking the Option 01 status byte. The mask value, <integer> is
the decimal equivalent of the binary eight bit byte ANDED with the
GPIB status byte, i.e., if a bit in the mask is a logic 1, the assertion
of the corresponding bit in the status byte will cause the Option 01
to assert SRQ. Refer to Table 3-1 for the bit assignments of the
GPIB Status byte. SRQ is asserted by raising the VXI Request
True exception to the VXI Resource Manager. Note the status byte
also details the possible responses of the 1260-01 to a GPIB serial
poll.
Service Requested (bit 7) is cleared by a VXI Status
Request command (or by sending a serial poll to a
VXI/GPIB Resource Manager. This will also raise a
VXI Request False exception which will cause a
VXI/GPIB Resource Manager to de-assert SRQ.
Programming Error (bit 6) is cleared when the YERR
command is received.
Scan List at Break Point (bit 4) is cleared when a
SCAN ON, SCAN OFF or SCAN CONT command is
received.
1260 Series User Manual
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