|
From: | Ben Hilburn |
Subject: | Re: [Discuss-gnuradio] DC Nonexistent Peak at Transmitter |
Date: | Tue, 5 Nov 2013 11:32:14 -0800 |
Hi Sema,MikeYou are most likely seeing the local oscillator at the centre due to the WBX being a direct conversion daughterboard:
To remove this, you can put the following in the center frequency box of the UHD source/sink block in GRC:
uhd.tune_request(uhd_center_freq, rf_freq=(uhd_center_freq+uhd_lo_offset),rf_freq_policy=uhd.tune_request.POLICY_MANUAL)Regards,
The 'uhd_center_freq' and 'uhd_lo_offset' need to be specified. Set 'uhd_lo_offset' to be something like ((samp_rate/2)*1.1).
--
Mike Jameson M0MIK BSc MIET
Ettus Research Technical Support
Email: address@hidden
Web: http://www.ettus.comOn Fri, Nov 1, 2013 at 3:21 PM, s k <address@hidden> wrote:_______________________________________________Hi all,I am trying to create a complex cosine signal in 100kHz and transmit it with USRP in 110MHz using WBX daughterboard. I have observed this signal in an oscilloscope and a spectrum analyzer. It can be seen that there is a nonexistent peak at transmit frequency of USRP. I also added the related photos to be clear.Any help would be kindly appreciated.Sema
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Prev in Thread] | Current Thread | [Next in Thread] |