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HP 7042XA Trapping Errors Using SRQ program Example
SRQ Program Comments
40
Reset the instrument.
70
Determine the type of Instrument: 3 is an HP 70427A, 4 is an
HP 70428A, 5 is an HP 70428A Option 002.
100
Configure the HP 70427A Downconverter or HP 70428A Option
002 Tunable Source as a Microwave Source.
140
Clear the Status reporting system.
150
Enable the Status byte to see the Standard Event Register.
160
Define the Standard Event register an event that can cause an SRQ.
In this case, a Query Error.
190
Jump to the status reporting subroutine when an SRQ is detected.
200
Enable an SRQ interrupt over the bus.
250
Set an output frequency of 2.4 GHz.
260
This command tries to set an output power of +30 dBm which is
beyond the specifications of the instrument.
270
Set the 100 MHz reference phase-lock-loop bandwidth to 53 Hz.
280
This command tries to set the 600 Mhz reference phase-lock-loop
bandwidth to 4 Khz, but has a syntax error.
290
Set the tuning sensitivity to .05 ppm/V.
300
Just wait for the SRQ to occur.
440
Query the Status byte.
450
Read the Status byte.
490
Query the Standard Event Register.
500
Read the Standard Event Register.
540
Start a loop to read all the error messages in queue.
550
Query an error message.
560
Read an error message.
570
Exit loop when all the error messages are read.
650
Re-enable an SRQ interrupt over the bus.
Remote Programming
HP 70427A/HP 70428A User's Guide 7-25
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