My Instek GAG-810 signal generator was replaced under warranty. But the new unit has the same problem: the output signal jumps up and down (in amplitude) in the 100x setting (1000 - 20000 Hz.). It’s irregular, but every 5 to 15 seconds it jumps up and down. I checked this measurement with several devices, from mV meter to spectum analyser). When using other signal generators (Victor 1 Khz. oscillator, 2 Leader analog signal generators and a Wandel & Golterman) the measuring equipment is showing stable results.
So it must be something with the GAG-810. The only thing is that I’m very surprised to find a second unit with the same problem using the 100x range.
Does this ring a bell to anyone? I guess I’ll have to get it replaced once again, it’s still in warranty.
Regards, Gerrit