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

[Dominique Dehays]

So I have done more measurements. Most products are below -80dBc and can 
be considered as marginal , but there are still  two pairs of products 
that are in band and -60 and -63dbc. Among theses products there is a 
pair which reduces when power is reduced , I wonder why as it is not 
harmonics, maybe intermodulation between carrier and spuriis? I'm not 
very confortable in generating these products. I'll try the transverter 
output tomorrow to know what is going on.


Le 05/08/2016 à 19:24, Dominique DEHAYS a écrit :
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>
>
>
> Hi dave ,
>
> so there is something stange on mine. I have just tried to lsn on a 
> second 28Mhz RX taking care that it is not saturated. I TX on 28.1 and 
> looking up the band I've found:+196/+251/+276/+451/+786/+1049/+1600Khz 
> , and I suppose the same down the band below 28.1. I have not measured 
> the relative levels yet , for sure the two I've written about in my 
> previous message were -60 and -63 , I'll tell abt the others 
> later.This is on the 10W output , but trying to reduce power changes 
> nothing on the spuriois levels I've measured yesterday
>
> 73
>
> Dom
>
>     > Message du 05/08/16 18:45
>     > De : "Dave" <g4fre at g4fre.com>
>     > A : "'Dominique Dehays'" <f6dro at wanadoo.fr>,
>     hpsdr at lists.openhpsdr.org
>     > Copie à :
>     > Objet : RE: [hpsdr] ANAN 10 28Mhz tx spectrum and generated birdie
>     >
>     > Hi Dom
>     >
>     > I saw nothing within -70dBC inband on my ANAN10 when using the
>     xverter port
>     > on 28MHz . My Anan has been used on many 2/4m contests with a
>     Transverter
>     > without complaints from my (VERY) locals
>     >
>     > This port does however have bad harmonics see
>     >
>     http://g4fre.blogspot.co.uk/2013/11/anan-10-as-transverter-driver.html
>
>     >
>     > Dave
>     > G4FRE
>     >
>     > -----Original Message-----
>     > From: Hpsdr [mailto:hpsdr-bounces at lists.openhpsdr.org] On Behalf Of
>     > Dominique Dehays
>     > Sent: 05 August 2016 17:31
>     > To: hpsdr at lists.openhpsdr.org
>     > Subject: [hpsdr] ANAN 10 28Mhz tx spectrum and generated birdie
>     >
>     > ***** High Performance Software Defined Radio Discussion List *****
>     >
>     >
>     >
>     > Hello ,
>     >
>     > after getting a local friend complaining about hearing me on
>     several
>     > frequencies , I've measured the anan 10 output spectrum , and was
>     > surprised to find spuriis 295 and 590 Khz each side of the
>     carrier at
>     > -60db/-63dB. I know it is within FCC norms but it is really
>     annoying.
>     > Another problem is that the anan generates a wide drifting
>     birdie in my
>     > 144Mhz receiver ( of course a separate receiver not the anan).
>     Anyone
>     > got the same problems?
>     >
>     > 73
>     > Dom
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