We have procured an EV-RADAR MMIC2 evaluation kit from Analog devices along with the EV-ADAR-D2S and Eval-SDP-CBIZ board as suggested by Analog Devices.
The board has been configured and set up as shown in page-13, figure 8 of UG-866. We have used cables which are 1 mt long and also 3 mts long with 20 dBm attenuator and dc-blocker as required. We have executed the initialization and control software stubs as indicated in the UG.
We have checked the Tx output using a Spectrum Analyzer. We have recorded an output of approximately -32 dBm with a 20dBm attenuator and approximately -18 dBm with a 6dbm attenuator.
This signal was looped back to the Rx-Channel. We monitored the output on port O5 of the EV-ADAR-D2S. We record only a DC-signal of approximately 2 volts. When we switch the scope to “AC-coupling” mode the output is a DC signal with an amplitude of “zero” volts.
We have tried various TX-Rx pairs and the result is the same.
We have attached a screen shot of the TX signal as monitored on a Spectrum Analyzer. We need some help to get the RX section working. FYI we are using only the scripts given by Analog Devices as a part of the development kit. We have not modified this in anyway.
Request guidance ASAP