08-16-2023 04:46 AM
@santo_13
The pin6 of HVA is signal ground,which is connected to the COM of NI-9263
08-16-2023 07:38 AM
In 9263, each AO channel is isolated, so you need to connect each channels' COM to HVA's GND.
08-17-2023 01:39 AM
@santo_13
In fact, I have tested and connected all the AO COMs of NI-9263 to pin6 of the HV converter, and the feedback voltage from pin4 is still 0
08-17-2023 08:46 AM
When connected to the HVA amp, were you able to ensure the AO output voltage is correct? sometimes if HVA is too much of a load, the voltage might be clamped.
08-20-2023 09:31 PM - edited 08-20-2023 09:32 PM
I have tested the voltage of each pin relative to pin6 with a voltmeter, and they are all correct, except the HVA output.
The test result is as below: