Hi Mark,
I think this file is related to an example here:
http://wiki.analog.com/resources/eval/user-guides/ad-fmcomms2-ebz/software/datafiles
Please note that this page/models are preliminary and subject to change.
If you are in interested in the file format and options - see here:
http://wiki.analog.com/resources/eval/user-guides/ad-fmcomms2-ebz/software/basic_iq_datafiles
-Michael