Agilent Technologies ESA-E Series Programmer's Manual page 44

The standard event status register contains the following bits:
Figure 2-8
Bit Number
Bit
0 A 1 in this bit position indicates that all operations were completed following execution of
the *OPC command.
1 This bit is always set to 0. (The analyzer does not request control.)
2 A 1 in this bit position indicates that a query error has occurred. Query errors have SCPI
error numbers from −499 to –400.
3 A 1 in this bit position indicates that a device dependent error has occurred. Device
dependent errors have SCPI error numbers from –399 to –300 and 1 to 32767.
4 A 1 in this bit position indicates that an execution error has occurred. Execution errors
have SCPI error numbers from –299 to –200.
5 A 1 in this bit position indicates that a command error has occurred. Command errors
have SCPI error numbers from –199 to –100.
6 A 1 in this bit position indicates that the
the analyzer is in local lockout mode.
7 A 1 in this bit position indicates that the analyzer has been turned off and then on.
Chapter 2
Use Status Registers to Determine the State of Analyzer Events and Conditions
7
6 5
*ESR?
Standard Event Status Register
2 1
4 3
Description
key has been pressed. This is true even if
LOCAL
Status Registers
0
ck765a
2-15