102 
Remote Commands
The Common Commands
NOTE Bit 6 cannot be masked.
*SRE? 
  The service request enable query returns the 
contents of the service request enable register.
Example  OUTPUT 728;"*SRE 48"
OUTPUT 728;"*SRE?"
ENTER 728; A$
*STB? 
Syntax     *STB?
Definition     The read status byte query returns the contents 
of the status byte register.
0 
≤ contents ≤ 255
Table 8-8 The Status Byte Register
Example  OUTPUT 728;"*STB?"
ENTER 728; A$
BITS MNEMONICS  BIT VALUE 
7 Operation Status 128
6 Request Service 64
5 Event Status Byte 32
4 Message Available 16
3 Questionable Status 8
2Not used 0
1Not used 0
0Not used 0
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