Re: ETTUS N210 spurious

[Marcus D. Leech]

On 2022-02-02 03:23, Fabien PELLET wrote:
> 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.
For comparison, a randomly-selected ICOM HF transceiver has a spurious 
specification of -50dBc, so -70dBc is 20dB better.  I think you'll need 
to implement
  analog filtering if -70dBc is a problem for you.