Dear Sir,
You should modify the software application to use one of the files, TM1_16k_IF0_Fup122.88_1111.txt would be a good one. We do not look at 30RF in the time domain generally but more in the frequency domain. I am attaching what the data buffer saved by the application looks like after an FFT was done on the signal.
Maybe this can provide you with some guidance. Note that in this case, I have placed a loopback cable (with 30db attenuation) between RF IN and RF I/O connectors. You could also use antennas on these connector.
There is also extra details on the following section
[size=78%]http://www.4dsp.com/forum/index.php/topic,1629.0.html[/size]The non flat noise floor on my screen shot is due to the attenuation on the path.
Try to reproduce our test setup because this is how we are testing the cards. There is a carrier frequency and you signal is modulated, on the RX side the signal is demodulated providing you with a the actual input signal, not as perfect as the first one obviously. On the screen shot, bottom part you see the actual signal being modulated and transmitted, the FFT on the input buffer and on the up area is a FFT from the demodulated signal.
What you can measure as is with your spectrum analyzer is the CLK for TX and RX they should be stable, the carrier frequency.
Best Regards,
Arnaud