Agilent Technologies E5100A, Руководство по программированию, Страница: 73 / 373

How to Use the Status Registers in a Program
Y ou can use the status registers to determine the specic analyzer status in the program. T o
determine the contents of the status register , the following methods are used:
Read an event register directly .
Use the Service Request (SRQ).
Reading an Event Register Directly
Y ou can read the contents of the event register directly to determine the specic analyzer
condition. Use this method if you do not need to know the timing of the event register
changes . The following procedure reads the register directly:
1. Query the event register contents .
2. Retrieve a return value .
3. Check the bit condition using the B ASIC BIT function.
OUTPUT @E5100;"ESB?" Queries instrument event status register contents .
ENTER @E5100;Esb R etrieve return value .
IF BIT(Esb,4) THEN
DISP "LIMIT TEST FAILED AT Ch 1."
END IF
If bit 4 of the instrument event status register is set to 1, the limit
test failed on channel 1.
Module 4-1. Reading an Event Register
Related GPIB Commands . The following query commands can be used to read the contents of
an event register directly .
*STB? Returns Status Byte Register contents .
*ESR? Returns Event Status Register contents .
ESB? Returns Instrument Event Status Register contents .
OSR? Returns Operation Status Register contents .
Using Status Reporting Function 5-9