We were reading GSM channels with Tvoid software (
http://wiki.thc.org/gsm/tvoid) and at the beginning it worked fine.
Suddenly, we do not how, it seems that noise level has increased in 30
approx. and only a few GSM channels can be now identified (but they are
only 10/15dB above noise power, when at the beginning there was at least
40dB) but this channels can be read so we think the front end is not
it seems the RF front end is not working properly or its configuration
wrong, but we do not know how we have made it. We think that the LP
in our dbsrx daughterboard may be working poorly. I attach you a
of the best received GSM channel (it is only 15dB above noise power).
I expect your help
Thank you for your time.