I am currently evaluating the RedPitaya for some testing purposes and use the SCPI interface to talk to it. First I put a saw tooth with the following settings on RF output 1:
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OUTPUT1:STATE ON SOUR1:FREQ:FIX 2200 SOUR1:FUNC SAWD SOUR1:VOLT 1 SOUR1:VOLT:OFFS 0 SOUR1:PHAS 0
The overall signal looks as follows:
The same signal zoomed on the edge:
And once measured in parallel using a 10x scope probe:
Finally without 50 Ohm load it looks worse:
I really wonder what happens here. Comparing to the other GBFs I use (of course more expensive) the RF output of the RedPitaya seems not being as good as the specs say.