1 Power Meter Remote Operation
60 N1911A/1912A P-Series Power Meters Programming Guide
The status byte enable register (SRE, service request enable) is cleared
when you:
• cycle the instrument power.
•execute a *SRE 0 command.
Using *STB? to Read the Status Byte
The *STB? (status byte query) command is similar to a serial poll except
it is processed like any other power meter command. The *STB? command
returns the same result as an IEEE- 488 serial poll except that the request
service bit (bit 6) is not cleared if a serial poll has occurred. The *STB?
command is not handled automatically by the IEEE- 488 bus interface
hardware and the command is executed only after previous commands
have completed. Using the *STB? command does not clear the status byte
summary register.
The Standard Event Register
The standard event register reports the following types of instrument
events: power- on detected, command and syntax errors, command
execution errors, self- test or calibration errors, query errors, or when an
overlapped command completes following a *OPC command. Any or all of
these conditions can be reported in the standard event summary bit
through the enable register. You must write a decimal value using the
*ESE (event status enable) command to set the enable register mask.
Tab le 1-6 Bit Definitions - Standard Event Register
Bit
Number
Decimal
Value
Definition
01 Operation Complete
All overlapped commands following an *OPC command have
been completed.
1 2 Not Used. (Always set to 0.)
24 Query Error
A query error occurred, refer to error numbers 410 to 440 in the
user’s guide.
To Next Page
Loading...
Need help?
General
