3
Programming
262
Keysight 53147A/148A/149A Operating and Programming Guide
RELATED
FRONT-PANEL
KEYS
None
*STB? (Status Byte Query)
COMMAND
*STB?
Queries the Status Byte Register, shown in
This register is cleared at power-on.
This query does not directly alter the Status Byte Register (including the
MSS/
RQS
bit) or anything related to the generation of
SRQ
.
Figure 3-23
The Status Byte Register
See the section titled
“Status Byte Register and Service Request Enable Register”
starting on page 175 for a detailed description of the Status Byte Register.
QUERY
RESPONSE
– Numeric data transferred as ASCII bytes in
<NR1>
format.
– Range is 0 to 255.
– The response value when rounded to an integer value and expressed in base 2
(binary), represents the bit values of the Status Byte Register.
– The value of unused bits is zero when queried.
3
(16)
4
(32)
5
(64)
6
(128)
7
(8)
EAV
2
MAV
ESB
RQS/MSS
OSB
QSB
Not
Used
0 to 1
Bits
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