Eric A. Cottrell wrote > > One thing to try is to use the scope program to set the threshold. The > default is low for alot of front ends including the DBSRX. The DBSRX > tends to be deaf. Also I find a gain setting of 32 to 36 seems to work > best for the DBSRX.
The DBSRX typically has a noise figure around 3-5dB. I wouldn't call that deaf. You are connecting a discone to a wide open front end without a filter, so it is far more likely that you are experiencing desense from the thousands of other signals you are picking up. Also, raising the gain above 32 would reduce the noise figure you see. > Getting the antenna up in the clear is important. A discone will work > if you have a good receiver but I found building a simple 1/4 wave > ground plane on an N connector beats out the discone. > Probably because it is more frequency selective than the discone, thus reducing the strong interferers. When you set up a discone on the DBSRX you need to understand that you are picking up multiple cellphone bands, the pager bands, 2 ISM bands, microwave ovens, radars, etc, in addition to the nice weak signals you are looking for. Matt _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
