Hi Eric > On Mon, Jun 16, 2008 at 05:48:05PM -0300, rafael2k wrote: >> Hi all, >> I'm using gnuradio to receive and transmit to 2 meters amateur radio, >> and when >> I went to buy the cable, I didn't know what impedance should I use w/ >> the >> usrp. 50 ohm or 75 ohm? >> >> Can I connect an amplifier to the basic-tx without any problem? >> >> thanks >> rafael diniz > > Please explain to me how you are planning on transmitting on 2 meters > using the basic tx daughterboard and how you are planning on > controlling out of band emissions.
By 2 meters (the wave length) radio I mean the range of 144-148 Mhz (here in brazil, is the band for amateur radio class C) - I can receive and transmit using the examples that come w/ gnuradio (fm_tx4.py and usrp_nbfm_rcv.py). I already bought an small antena (1/4 of wave length - its working), but I'd like to put an antenna in the top of my home (to receive, w/ basic-rx), so I'd like to know what impedance (for the cable) should I use. Another issue is that in the future I would like to put an amplifier in the output of the basic-tx to reach farther places. Is it simple as I think it is? USRP is really a great piece of hardware!! I did not thought about the out of band emissions yet... may be I could add some filters too... Thanks, Rafael Diniz _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
