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.
