3 Remote Interface Reference 
SCPI Status Registers
110 E3632A User’s Guide
For example, 16 is returned when you have queried the 
status of the questionable event register, the temperature 
condition is questionable.
The Questionable Status Enable register is cleared when you 
execute the STAT:QUES:ENAB 0 command.
The Standard Event register
The Standard Event register reports the following types of 
instrument events: power- on detected, command syntax 
errors, command execution errors, self- test or calibration 
errors, query errors, or when an *OPC command is executed. 
Any or all of these conditions can be reported in the 
Standard Event summary bit (ESB, bit 5) of the Status Byte 
register through the enable register. To set the enable 
register mask, you write a decimal value to the register 
using the *ESE (Event Status Enable) command.
An error condition (Standard Event register bit 2, 3, 4, or 5) will always 
record one or more errors in the power supply’s error queue. Read the error 
queue using the SYST:ERR? command.
Table 3 - 5 Bit definitions — Standard Event register 
Bit Decimal value Definition
0 OPC 1 Operation complete. All commands prior to and including an *OPC 
command have been executed.
1 Not Used 0 Always set to 0.
2 QYE 4 Query Error. The power supply tried to read the output buffer but it was 
empty. Or, a new command line was received before a previous query 
had been read. Or, both the input and output buffers are full.
3 DDE 8 Device Error. A self-test or calibration error occurred (refer to error 
messages 601 to 755 in “Self-Test Error Messages” on page 135 and 
“Calibration Error Messages” on page 137).