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From: | Fabien PELLET |
Subject: | Re: ETTUS N210 spurious |
Date: | Wed, 2 Feb 2022 09:23:28 +0100 |
User-agent: | Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.5.1 |
Hello,Here is the flowgraph. I see the spurs on an HP8563E with RBW at 30Hz and span at 200Khz. I remember that it could be related to my spectrum analyser : I will investigate in that direction before. But if someone could make the test, it could be interesting. I use a N210 with LFTX and LFRX.
-70dBc could be nothing for digital transmission but in analog use case, as near as it is from the signal, -70dBc is not so good. For station closed to that TX, it will be heard especially in HF usage.
Best regards, Fabien, F4CTZ. Le 01/02/2022 à 17:01, Marcus D. Leech a écrit :
On 2022-02-01 06:35, Fabien PELLET wrote:Hello,Thanks for the reply. As I wrote, I try several sampling rate on the baseband I provide to the USRP without any effects on that spurs so it is not related to the sampling rate. I just put a signal source that feeds the USRP sink for that test.It should be EMC related, as far as I understand reading all answer on that mailing list.Thanks, Best regards, Fabien, F4CTZ.Could you share the exact flow-graph you're using?Also, a spur at -70dBc can usually be ignored in any practical system -- it's 10,000,000 times weaker than the carrier.
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