Keysight U3606A, Programmer'S Reference Manual, Page: 344 / 372

15 IEEE-488.2 Common Commands
*SRE
330 U3606A Programmer’s Reference
*SRE
Syntax
*SRE <value>
The
*SRE
(Service Request Enable) command enables bits in the enable
register for the Status Byte register group. Once enabled, the
corresponding bits may generate a Request for Service (RQS) in the Status
Byte. This RQS event may generate a “call back” to your application as a
type of asynchronous interrupt.
Table 15-2 Status Byte register mapping
*SRE?
This command reads the enable register and returns a decimal value
which corresponds to the binary- weighted sum of all bits set in the
register. For example, if bit 2 (decimal value = 4) and bit 4
(decimal value = 16) are enabled, the query returns “ +20 ”.
Bit number Decimal value Definition
0 Not used Not used
1 Not used Not used
2 4 Error queue
3 8 Questionable Data summary
4 16 Message available
5 32 Standard Event summary
6 Not used Not used
7 128 Standard Operation summary
N O T E
For more information on the bit definitions of the Status Byte register and
the SCPI status diagram, see
“SCPI Status System” on page 12 .