I received my picoscope 2208 last week, and for now, I'm playing with the awg. I get strange results, especially with square waves (similar issues are present with others wave types):
When I set a frequency that is a divisor of 10 Mhz, i.e for exemple, 100 kHz, 125, 200, 250, 400, 500, 625, 1 Mhz, everything is fine. Why 10 Mhz ? Because I suspect there is a internal clock (or something like this) running at that frequency.
But with all others frequencies, the wave becomes unstable. As a consequent, the frequency is not stable too. Here is what is got in persistent mode with a 450 kHz square wave:
There is sometimes, roughy 1/6 of the times, a delay of about 50 ns on the positive or negative part of the wave.
If I use the frequencies mentioned above, this delay disappears:
Is there something I'm doing wrong ?