Re: [Discuss-gnuradio] Two USRP B210s with Octoclock-G (Samith Abeywickrama)

Hi Samith, to calibrate phase offset you can use a "calibration signal". Using a (phase) balanced power divider you can feed the 4 rf input with this calibration signal and use it to estimate differential phasors between the 4 channels taking one of them as reference (i.e. the first). You will hav

Re: [Discuss-gnuradio] mirrored spectrum around tuning freq

Hi Marcus, in the picture you see the power output of the signal generator is -30 dBm. Changing it to -90 dBm does not produce any change in the received signal except a (obvious) lower level. There is not other amplifier between signal generator output and N200 input. Luca -- Ing. Luca

Re: [Discuss-gnuradio] mirrored spectrum around tuning freq

Hi Martin, Marcus, I am using a N200 + WBX. Gain set on the USRP is equal to 5 dB. Changing the power of the input signal does not change anything. Moreover the output of the signal generator is sent (via a 2way power divider) to a spectrum analyzer and the input signal is ok. I made some other t

[Discuss-gnuradio] mirrored spectrum around tuning freq

Hi all, why when I use: uhd::tune_request_t tr(tuningFreq); USRP_DEVICE->set_rx_freq(tr); I get a spectrum that is "mirrored" around the tuninFreq ? See: http://picpaste.com/sp-zJquS0qK.png with tuningFreq = 149.8 MHz, input signal at F = 150 MHz (from signal generator) If I use a LO offset diff

Re: [Discuss-gnuradio] N200 strong spikes

you just > running uhd_fft.py? Have you tried using benchmark_rx.py/benchmark_tx.py? > > -Jason > > ________ > From: Luca Pascale > To: discuss-gnuradio@gnu.org > Sent: Thursday, May 3, 2012 8:18 AM > Subject: [Discuss-gnuradio] N200 strong spike

[Discuss-gnuradio] N200 strong spikes

Hi all, I am using a N200+WBX with samplerate = 5e6, no input signal. Independently on the tuning frequency I have two strong spikes about 1 MHz far (see attached picture on 500 MHz tuning frequency). http://img189.imageshack.us/img189/7707/spikesf.jpg I have a similar situation on 434 MHz ban

Re: [Discuss-gnuradio] power amplifier

, they get toasted easily. >> >> http://www.minicircuits.com/pdfs/ZHL-1-2W.pdf > > I have used the 5W version of the above with success @ 400-500 MHz. > The enormous heatsink is still a bit undersized, however. > > Johnathan -- Ing. Luca Pascale LOG.IN S.r.l Via

[Discuss-gnuradio] power amplifier

Hi all, Can someone suggest me a power amplifier to use with usrp+wbx on the 434 MHz band ? (I need a small output power...from 2 to 5 W). Thanks in advance, Luca ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman

Re: [Discuss-gnuradio] USRP2 and external RF tuner

. That will make it much stronger than the > spurs. This is why boards like the RFX, DBSRX, and WBX all have amplifiers. > I suggest amplifying your signal by at least 30dB. > > Matt > > > On 09/01/2010 06:10 AM, Luca Pascale wrote: > >> Hi all, >> >> I a

[Discuss-gnuradio] USRP2 and external RF tuner

Hi all, I am working with a usrp2+BasicRx and an external tuner with a 21.4 MHz IF output and a bandwidth of about 20 MHz. The same setup but with usrp1 (instead of usrp2) it's working well. Now I am injecting a tone at 21.45 MHz (-60 dBm) at the input of the BasicRX and set the usrp2 freq at 21.

[Discuss-gnuradio] No UHD Devices Found

Hi, I have received two new USRP2 (rev 4) with a BasicRx DB. I connect the DB, set the gbit lan so that : eth1 Link encap:Ethernet HWaddr 00:15:17:e6:86:56 inet addr:192.168.10.1 Bcast:192.168.10.255 Mask:255.255.255.0 inet6 addr: fe80::215:17ff:fee6:8656/64 Scope:Link

[Discuss-gnuradio] 2channel USRP2 with Ext RF frontend

Hi all, is not clear for me if using a single USRP2 with 2 external RF downconverters is possible to obtain the IQ samples from two channels. From the FAQ seems that should be possible using the BasicRX with the 2 RF front-ends connected to the two BasicRx RF input. Can someone help me to clarify

[Discuss-gnuradio] getting IQ data from 2 uspr1 synchronously

HI all, I need to get IQ samples from 2 USRP1 in a synchronous manner. Thus I cant make: urx1->read() urx2->read() I'need to execute the two "read()" operation "at the same time" (or something similar). Any suggestion to do that ? Thanks in advance Luca ___

[Discuss-gnuradio] mux setting

Hi all, I would want to use the following configuration: dboard BasicRX#1 on slot RX-A connected to an antenna dboard BasicRX#2 on slot RX-B connected to another antenna How should I set the mux to take the IQ from both dboard ? What about the phase coherence of this configuration ? (I have 2

Re: [Discuss-gnuradio] USRP1+external VUHF Tuner and C++ Interface

format(0x0300)-default). Thanks again, Luca Eric Blossom wrote: > > On Wed, Jul 29, 2009 at 02:31:12PM -0700, Luca Pascale wrote: >> >> Hi all, >> >> I am trying to use USRP1 with an external Tuner using the C++ USRP >> interface >> example founded on the

[Discuss-gnuradio] USRP1+external VUHF Tuner and C++ Interface

Hi all, I am trying to use USRP1 with an external Tuner using the C++ USRP interface example founded on the wiki. The Tuner have a 16 MHz BW centered at 21.4MHz IF. I have connected it (passing through a passband filter centered @21.4M and 16M wide) to USRP using the BasicRX daughterboard. I have

[Discuss-gnuradio] set frequency and bandwidh

hi, I have written a signal processing module. This module need the baseband samples of a signal at frequency=f0 and bandwidth=B. I am thinkin to use the usrp according to this scheme: | antenna| || ||