[hpsdr] ANAN 10 28Mhz tx spectrum and generated birdie

[Helmut]

Hi Dom,

I'm not in doubt about your competence. I checked the solo boards -
especially 2 Hermes -  directly at the TX socket. No in-band spurs or
birdies less than >80 dB down.

Maybe you'll disconnect the PA-board of your ANAN and recheck.

73, Helmut, DC6NY


-----Ursprüngliche Nachricht-----
Von: Hpsdr [mailto:hpsdr-bounces at lists.openhpsdr.org] Im Auftrag von
Dominique Dehays
Gesendet: Samstag, 6. August 2016 12:06
An: hpsdr at lists.openhpsdr.org
Betreff: Re: [hpsdr] ANAN 10 28Mhz tx spectrum and generated birdie

***** High Performance Software Defined Radio Discussion List *****

Hi Helmut ,


I can assure U I know very well how to use a spectrum analyser and I 
garantee there is no saturation in my measurement. Those spuriis really 
are there and there are some out of the ham bands as well. The question 
now is :

are they coming from the sdr board , or from the amplifier ( maybe it is 
time to look for some DC-DC converter inside or something like this?)


73

Dom



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