Chapter 2 2-13
HP ESA Status Registers
Using the Analyzer Status Registers
To query the Standard Event Status Register, send the command
*ESR?. The response will be the decimal sum of the bits which are set
to 1. For example, if bit number 7 and bit number 3 are set to 1, the
decimal sum of the 2 bits is 128 plus 8. So the decimal value 136 is
Bit Description
0 A 1 in this bit position indicates that all pending 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 LOCAL key has been pressed. This is true even if
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.
Bit Number
7
6
54
3
2
1
0
Command Error
Execution Error
Device Dependent Error
Query Error
Request Bus Control
User Request Key (Local)
Description
Power On
Operation Complete
ck765a
Standard Event Status Register
*ESR?
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