Sre <Nrf - Keysight 8990B Programming Manual

2 IEEE-488 Command Reference
*SRE <NRf>
The *SRE (Service Request Enable) command enables the bits in the Status Byte
enable register. The selected enabled bits are summarized in the "Master Status
Summary" (MSS) bit (bit 6) of the Status Byte register. If any of the selected bit
condition changes from 0 to 1, a Service Request is generated. The <NRf>
parameter is used to specify which bits to enable. The specified decimal value
corresponds to the binary-weighted sum of the bits you wish to enable in the
register. For example, to enable bit 2 (decimal value = 4) and bit 5 (decimal value
= 32), the corresponding decimal value would be 36 (4 + 32).
The following table lists the bit definitions of the Status Byte register:
Table 2-3 Bit definitions: Status Byte register
Bit Weight/Decimal value
0 1
1 2
2 4
3 8
4 16
5 32
6 64
7 128
Refer to
Syntax
56
"Status Byte summary register"
Space
*SRE
?
Definition
Not used
Device Status register summary
Error/Event queue
Questionable Status register summary
Message available
Standard Event register summary
Master Status summary (Request for service)
Operation Status register summary
on page 39 for more details.
NRf
Keysight 8990B Programming Guide