Yesterday I received a second FMCOMMS1 board.
This new one is a Rev C, while the last one was a Rev B.
I plugged it into my ML605 and tried to run the same Simulink code, but it seems that the TX portion does not respond correctly.
When I hook up my spectrum analyzer, I see a carrier at -44dBm but I do not see any sidebands.
The Rev B version on the other hand shows a carrier at around 4dBm and clearly defined sidebands from the QPSK modulation.
Also, the synchronization between the Simulink block and the FMCOMMS1 had intermittent problems:
The error above happens when pushing “Synchronize” in the Simulink transmitter block: (see attachment)
When pushing repeatedly, it will eventually synchronize, but not all Device Values are identical to the Desired Values (See DAC Sampling Rate and Interpolation factor):
So I wonder if I have a board communication problem here ?
The Rev B does not show any of these symptoms.