Agilent Technologies Infiniium 8000A Programmer's Reference Manual page 230

Table 11-3
Common Commands
*ESR? (Event Status Register)
Standard Event Status Register Bits
Bit Bit Weight Bit Name
7 128 PON
6 64
5 32 CME
4 16 EXE
3 8 DDE
2 4 QYE
1 2 RQC
0 1 OPC
0 = False = Low
11-8
Condition
1 = OFF to ON transition has occurred.
Not Used. Permanently set to zero.
0 = no command errors.
1 = a command error has been detected.
0 = no execution error.
1 = an execution error has been detected.
0 = no device-dependent errors.
1 = a device-dependent error has been detected.
0 = no query errors.
1 = a query error has been detected.
0 = request control - NOT used - always 0.
0 = operation is not complete.
1 = operation is complete.
1 = True = High