I'm playing with the bladeRF1 + XB-200 trying to generate a signal on the DAC output of the XB-200. I have seen in the schematics that the DAC output is connected directly to the output of the IDAC through a transformer. I'm trying to use it from a GNU Radio diagram. My assumptions are the following
* A DC level will be removed by the transformer, so only signal will pass tru
* The DAC work in baseband so it is indifferent the frequency I set in the osmocon.
* Just the real part of the signal will go out as it is connected to the IDAC only.
* The gains of the osmocon are also irrelevant.
Then I use a diagram wit a signal source (amplitude=1, freq=10Khz) and a osmocon, and 1Mhz samp_rate. Then I get a very smal signal (some mV) in the DAC output, with a lot of peaks of ... noise? indeed the noise is greater than the signal.
What am I doing bad?