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Re: [Discuss-gnuradio] CW between bursts
From: |
Josh Blum |
Subject: |
Re: [Discuss-gnuradio] CW between bursts |
Date: |
Sun, 11 Dec 2011 21:00:27 -0800 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:8.0) Gecko/20111124 Thunderbird/8.0 |
On 12/11/2011 08:26 PM, Nowlan, Sean wrote:
> I'm not sure whether this is a GNU radio or USRP issue, so I'm
> posting to both lists. I played around with GNU radio's stream
> tagging feature and managed to implement something that does timed
> bursts (partially by taking a lead from tag_source_demo.h, etc. in
> gr-uhd/examples).
>
Cool!
> I'm observing a continuous wave at the carrier frequency in between
> bursts, and also during start-up when the gr_uhd_usrp_sink object is
> instantiated before any samples get transmitted. The CW is about 30
> to 40 dB down from my signal, but I'd like the radio to be silent in
> between bursts.
I suppose you are seeing the LO of the transmitter. What daughterboard
is this? I recently pushed a change because SBX was not properly
disabled between TX bursts.
-Josh