Re: [Discuss-gnuradio] Feeding 12VDC through COAX using DBSRX

2009-10-22 Thread Matt Ettus
Patrik Tast wrote: Hi All, At the moment I feed 12 VDC into COAX outside Ettus USRP1 12VDC to power my LNA. I have a DC-Block at the receiver to prevent voltage back into the DBSRX-LF REV 2.2. Connector J100 say Antenna Bias + and GND 500mA @ 6V. My question is, is it possible to feed 12V

Re: [Discuss-gnuradio] Possible to change RFX400 LO tuning step size?

2009-10-22 Thread Glenn Richardson
Matt Ettus wrote: I assume you mean on the USRP1. Change the R divider in constructor of the db_flexrx_400_{tx,rx}_mimo_b in db_flexrf_mimo.cc An R divider of 16 (the current setting) make the LO step size 64 MHz/16 = 4 MHz, but the following stage divides it by 2 again for a step size of 2

Re: [Discuss-gnuradio] Possible to change RFX400 LO tuning step size?

2009-10-22 Thread Matt Ettus
Newman, Timothy wrote: Is it possible to change the tuning step size on the RFX400 to something different than the 2 MHz step size it's on now? I've been looking through db_flexrf.cc and have had no luck. I assume you mean on the USRP1. Change the R divider in constructor of the db_flexrx_40

[Discuss-gnuradio] problem running bbn802.11

2009-10-22 Thread Alaelddin Fuad Yousif Mohammed
Hi All I am tried to run bbn802.11 , but I faced the following error, r...@ala-laptop:/sdr/douggeiger/src/examples# ./bbn_80211b_rx.py Traceback (most recent call last): File "./bbn_80211b_rx.py", line 37, in from bbn_80211b_pkt import * File "/sdr/douggeiger/src/examples/bbn_80211b_pkt.p

Re: [Discuss-gnuradio] Question about the FFT

2009-10-22 Thread Josh Blum
Kóczián Gergely wrote: Hi all! A have a little probleme with FFT. I use the GRC without USRP. I would like to messeaure a triangle signal, but i never becam the right effect. I attached the picture about the measuring. The problem are the followed: I don't why but, i have allways a peak at

Re: [Discuss-gnuradio] Question about the FFT

2009-10-22 Thread B.A.f.H.
Hi, in your picture is a peak at -12KHz. Is it possible, that you have to calculate the absolut value from the FFT? On a normal calculator it's the function abs(). > Hi all! > > A have a little probleme with FFT. > > I use the GRC without USRP. I would like to messeaure a triangle > signal, b

[Discuss-gnuradio] Question about the FFT

2009-10-22 Thread Kóczián Gergely
Hi all! A have a little probleme with FFT. I use the GRC without USRP. I would like to messeaure a triangle signal, but i never becam the right effect. I attached the picture about the measuring. The problem are the followed: I don't why but, i have allways a peak at 0Hz. - Independent from the