Re: [Discuss-gnuradio] Fwd: Problem in uhd_fft

2013-07-07 Thread Karan Talasila
H i Marcus, I got it. It is a case of bandpass sampling. .Thank you. On Fri, Jul 5, 2013 at 6:12 PM, Marcus D. Leech wrote: > ** > On 07/04/2013 11:51 PM, Karan Talasila wrote: > > Hi Josh, > can you explain how and why the frequency translation > occurs? second

Re: [Discuss-gnuradio] Fwd: Problem in uhd_fft

2013-07-05 Thread Marcus D. Leech
On 07/04/2013 11:51 PM, Karan Talasila wrote: Hi Josh, can you explain how and why the frequency translation occurs? secondly when the same basic tx chip is used on a usrp N210, the translation occurs at 50Mhz and after. So for USRP N210, the entire range from 0-250 Mhz is repre

Re: [Discuss-gnuradio] Fwd: Problem in uhd_fft

2013-07-04 Thread Karan Talasila
Hi Josh, can you explain how and why the frequency translation occurs? secondly when the same basic tx chip is used on a usrp N210, the translation occurs at 50Mhz and after. So for USRP N210, the entire range from 0-250 Mhz is represented by alternating between -50Mhz to +50Mhz. Why

Re: [Discuss-gnuradio] Fwd: Problem in uhd_fft

2013-07-04 Thread Josh Blum
On 07/04/2013 01:41 AM, Karan Talasila wrote: > Hi Josh, > we tried using the same grc flowgraph and tried transmitting at > frequencies 33Mhz and 35 Mhz. Though we could see a constant source output > on the fft, the frequency at which that was occuring was at -31Mhz and > -29Mhz. Th

Re: [Discuss-gnuradio] Fwd: Problem in uhd_fft

2013-07-03 Thread Josh Blum
On 06/29/2013 09:14 AM, Karan Talasila wrote: > -- Forwarded message -- > From: Karan Talasila > Date: Sat, Jun 29, 2013 at 6:44 PM > Subject: Re: [Discuss-gnuradio] Problem in uhd_fft > To: "j...@joshknows.com" > > > Hi Josh, > I am using USRP 1. I am using a sm

[Discuss-gnuradio] Fwd: Problem in uhd_fft

2013-06-29 Thread Karan Talasila
-- Forwarded message -- From: Karan Talasila Date: Sat, Jun 29, 2013 at 6:44 PM Subject: Re: [Discuss-gnuradio] Problem in uhd_fft To: "j...@joshknows.com" Hi Josh, I am using USRP 1. I am using a sma-bulkhead cable from Tx_A of basic tx daughter board and similarl