HP 4284A - Page 327

*STB?
The *STB? query reads the status byte by reading the master
summary status (MSS) bit. These bits represent the contents of the
status byte register. Execution of the *STB query command has no
eect on the contents of the status byte register.
Query Syntax
*STB?
Query Response
Returned format is :
< value > <NL^END>
Where,
< value > NR1 format : decimal expression of the contents of the
status byte register
The denition of each bit of the status byte is as follows.
Bit No. Description
7 Operation Status Register Summary Bit
6 RQS (Request Service) Bit
5 Standard Event Status Register Summary Bit
4 MAV (Message Available) Bit
3{0 Always 0 (zero)
Example
10 OUTPUT 717;"*STB?"
20 ENTER 717;A
30 PRINT A
40 END
8-86 Command Reference