It is also software if you trace back the pins from te output to the molex connector where the option 521 connects you figured out that the output- terminal of the outputs are routed there. As I mentioned before the output is voltage is zero at the output connector but it is present and programmable on both channels if measure on the points that the SM suggests.
Probably the SW need to know how to control those additional relays but as the instrument is not knowing which option it has installed this is not happenning.
Also I add that I figure out also here. I already posted this on an old thread better having here because this is a newer thread.
I see in this video of keysight
around 1:49 there is a DIAG:SN option to set the SN via GPIB.
I try to write a script but is failing saying it is not liking the serial number format. Apparently it expect something that is not text for parameter?
I am new at pyvisa so maybe I am doing a stupid mistake?
# First enable calibration
foundInst.write(":CAL:STAT 1")
# Send the serial number
foundInst.write(f":DIAG:SN US39071080")
# Save calibration
foundInst.write(":CAL:SAVE")
# Disable Calibration
foundInst.write(":CAL:STAT 0")
# Close the instrument.
foundInst.close()
Returned error is -148 that for the user manual is: -148: Character data not allowed
I can imagine there an equivalent DIAG command for enable options?
Apparently If I send, after having enable calib, :DIAG:OPT 521 the instruments is not reporting any error but still no such option is than enabled and stored.