Thanks a bunch guys, Matt as soon as I get another module on my bench, I will do exactly as you suggested here and post the results. Perhaps we can get something that makes sense. Also, most of the time I’m working one channel at a time so I can just simply put a volt meter when the devices under test and check the second generator output has it I guess would be loaded down as well? I’ll report back as soon as possible thank you all very much.
Hi, looked at the AP555 datasheet and the least output impedance is 40 Ohm which is of course less than the 200 Ohm of the QA403. Therefore a different level will be when connected to a midrange impedance like 2 kOhm. But the AP can be selected to higher impedance like 100, 150, 200 and 600 Ohm. So why not give a try with 200 Ohm output impedance of the AP555. Perhaps it gives comparable results to the QA403 ?
Skip, I’m not sure if I understood correctly what you wrote but a volt meter has very high impedance so it won’t be also loaded down.