Re: [Discuss-gnuradio] Periodically varying channel gain mesurements

2011-02-25 Thread Veljko Pejovic
Thanks for the suggestions. I'll see if the same 10MHz clock changes anything. However, my initial idea was to have devices far apart. Clocking the with the same ref clock in that setup seems impossible. Cheers, Veljko On Thu, Feb 24, 2011 at 5:16 PM, Johnathan Corgan wrote: > On Thu, Feb 24,

Re: [Discuss-gnuradio] Periodically varying channel gain mesurements

2011-02-24 Thread Johnathan Corgan
On Thu, Feb 24, 2011 at 16:54, Veljko Pejovic wrote: > > I'm using Ubuntu 10.04 with a recent gnuradio-next branch and the UHD > driver on USRP2/WBX boards. > In an outdoor setup I have two receiving nodes about 40m away from > each other and from the transmitter. The transmitter is a PC with two

Re: [Discuss-gnuradio] Periodically varying channel gain mesurements

2011-02-24 Thread Jason Abele
> The gain seems to be varying with around 2 Hz frequency. Quite possible, the WBX transmit has an analog power control loop formed by the ADL5386. The "gain" setting on WBX transmit is really more of a setpoint for the power control loop than gain Jason

[Discuss-gnuradio] Periodically varying channel gain mesurements

2011-02-24 Thread Veljko Pejovic
Hi, I'm using Ubuntu 10.04 with a recent gnuradio-next branch and the UHD driver on USRP2/WBX boards. In an outdoor setup I have two receiving nodes about 40m away from each other and from the transmitter. The transmitter is a PC with two USRP2s connected with a MIMO cable. It is sending two diffe