I ran into an annoying behavior of my SDG2042X. I believe it's a bug:
When I switch the output of channel 1 ON, while channel 2 is already ON, there is a 6 ms interruption of the channel 2 output. See the attached screenshot, showing channel 1 on top and channel 2 below.
The blackout seems to always last approx. 6 ms, independent of the frequency settings. The same glitch happens on channel 1 when channel 2 is switched ON.
On the other hand, switching a channel OFF does not have this side effect. [Edit: It does, see below.] When I first observed this, I had channel coupling activated (fixed frequency ratio), but the glitch also occurs without the coupling.
Is this a known behavior? Is there a workaround? (Yes, plugging/unplugging the BNC instead of switching the channel does help...
) My firmware version is 2.01.01.23R8, hardware version 02-02-00-35-00. The SDG has been "upgraded" to SDG2122X specs.
Thanks for any hints!
EDIT: Hang on, there is also a problem when switching a channel OFF! It's just different from what I had expected, hence I did not set up the scope trigger right to see what is going on. See the second attachment: Even more annoying, since channel 1 goes into an undefined state for 6ms before it actually switches OFF,
and there is a brief dropout on channel 2.