I took a risk and connected the grounds together and nothing bad happened, so I guess my problem is resolved! thanks for your help. Omid
Thanks for the Welcome! The prblem is that it doesn't work, the 5 V signal provided by the instrument is not 5V compared to the DSP ground....
Hi, I have a DSP demo board which is powered from an AC/DC adaptor (5V). I also have another instrument which is supplied by a separate AC/DC...
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