Re: [Discuss-gnuradio] Single-tone test using USRP2 with RFX2400 and XCVR2450

2009-08-28 Thread Igor Almeida
On Fri, Aug 28, 2009 at 5:22 PM, Eric Blossom wrote: > If you're trying to send a sine wave, this will work much better: > (Generates a complex sinusoid == exp(jwt)) > >  sig_source_c -> head -> usrp.sink_c > > Or you could use a hilbert transform to generate the quadrature > component.  float_to_c

Re: [Discuss-gnuradio] Single-tone test using USRP2 with RFX2400 and XCVR2450

2009-08-28 Thread Eric Blossom
On Fri, Aug 28, 2009 at 02:05:02PM -0300, Igor Almeida wrote: > On Fri, Aug 28, 2009 at 12:56 PM, Douglas > Geiger wrote: > > That sounds like it could be a frequency offset between TX and RX. You > > say you aren't synchronized (which I interpret to mean you don't lock > > the clocks of the TX and

Re: [Discuss-gnuradio] Single-tone test using USRP2 with RFX2400 and XCVR2450

2009-08-28 Thread Igor Almeida
On Fri, Aug 28, 2009 at 12:56 PM, Douglas Geiger wrote: > That sounds like it could be a frequency offset between TX and RX. You > say you aren't synchronized (which I interpret to mean you don't lock > the clocks of the TX and RX together somehow) - do you have a costas > or similar carrier offset

Re: [Discuss-gnuradio] Single-tone test using USRP2 with RFX2400 and XCVR2450

2009-08-28 Thread Douglas Geiger
On Fri, Aug 28, 2009 at 11:09 AM, Igor Almeida wrote: > > I [believe I] am having a similar problem with USRP rev4 and RFX2400. > Sending a QAM-modulated signal in a 2.5GHz carrier with no > synchronization gives me a lot of background noise before the actual > signal. So I am prepending a 2MHz sin

Re: [Discuss-gnuradio] Single-tone test using USRP2 with RFX2400 and XCVR2450

2009-08-28 Thread Igor Almeida
On Fri, Apr 24, 2009 at 12:30 AM, Yongsang Kim wrote: > Hi, all. > > I did single-tone test using USRP2 with RFX2400 and XCVR2450. > There are some undesired signals in the results. > > My single-tone test is as follows: > - Wired connection between USRP2 and Spectrum analyzer > - Single-tone is tr

Re: [Discuss-gnuradio] Single-tone test using USRP2 with RFX2400 and XCVR2450

2009-04-26 Thread Matt Ettus
Yongsang Kim wrote: Hi, all. I did single-tone test using USRP2 with RFX2400 and XCVR2450. There are some undesired signals in the results. My single-tone test is as follows: - Wired connection between USRP2 and Spectrum analyzer - Single-tone is transmitted from USRP2 using the following comma

[Discuss-gnuradio] Single-tone test using USRP2 with RFX2400 and XCVR2450

2009-04-23 Thread Yongsang Kim
Hi, all. I did single-tone test using USRP2 with RFX2400 and XCVR2450. There are some undesired signals in the results. My single-tone test is as follows: - Wired connection between USRP2 and Spectrum analyzer - Single-tone is transmitted from USRP2 using the following commands ./usrp2_siggen.