Products > Test Equipment
Siglent SPD1168X Visa Commands
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metr:
Just got a Siglent SPD1168X partly based off several of the threads here. Mostly good experience so far! Seems solid and no weird voltage spikes or anything.

I've been trying to use it with pyvisa/pyvisa-py over USB and I've been having some issues with some of the commands listed in the user manual. I'm able to "*IDN?" and set/get the voltage and current setpoints, but enabling/disabling the output with "OUTPut CH1,ON" (and any variant of that I could think of) yields an error. I reached out to Siglent but haven't heard back. Has anyone gotten this working over USB? All of the examples I've seen use ethernet so I'm wondering if this is a USB-only issue?
tautech:
Welcome to the forum.

Have you checked out the Operating Tips and App Notes here:
https://siglentna.com/power-supplies/spd1000x-series-programmable-dc-power-supply/#resources


BTW we have a thread for these PSU's here:
https://www.eevblog.com/forum/testgear/new-spd1168x-siglent-psu/
metr:
Thanks for the welcome!

Yeah I looked through those, I'm able to run the basic commands and get responses from the instrument, but the output control and measurement commands return instrument errors for me. I don't see any examples using anything but "*IDN?" over USB, so I hope that's not a limitation on this interface.
tautech:
Maybe this hiding in the SPD3303X webpage might help:
https://siglentna.com/operating-tip/spd-programming-tips/
metr:
Yeah that programming guide is really handy! It's nice to know that they require time between commands.

I ended up figuring it out, it was an issue with pyvisa unexpectedly appending an extra termination character, so the commands were ending with '\n\n'. Odd that the power supply only had an issue with that on some commands but an easy fix.

Thanks for the help!
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