Re: [Discuss-gnuradio] RFX-400 RF sensitivity

2006-11-24 Thread Marcus Leech
Greg Troxel wrote: Is it possible that the high speed digital signaling on the USRP motherboard is significantly reducing the sensitivity of the daughter-board? Yes, it is possible. You should examine the circuit diagram and determine what kind of noise floor you would expect, given th

Re: [Discuss-gnuradio] RFX-400 RF sensitivity

2006-11-24 Thread Greg Troxel
We are using the RFX-400 board (without housing) with an appropriate aerial connected to TX/RX. I'll assume appropriate means a 1/4 lambda vertical without a real ground plain. Still, that's ok. Using various examples (usrp_fft.py, usrp_wfm_rcv.py and usrp_nbfm_rcv.py) we attempted to r

[Discuss-gnuradio] RFX-400 RF sensitivity

2006-11-24 Thread Jonas Hodel
Hi, We are using the RFX-400 board (without housing) with an appropriate aerial connected to TX/RX. Using various examples (usrp_fft.py, usrp_wfm_rcv.py and usrp_nbfm_rcv.py) we attempted to receive a signal over-air, generated by a handhold portable radio unit. Unfortunately We were unable t