[hpsdr] Hermes Intermittent Problem

[georg Prinz]

Hello John,

I had similar symtons several times with my Atlas based system. The 
culprit was a broken ground connection of the Alex BNC-antenna-connector.
If you are using a heavy coax-cable for the antenna connection the 
weight will damage the BNC-connector (the case is made of cast aluminium) .

73, Georg

DL2KP



Am 12.04.2015 um 21:10 schrieb John Ackermann N8UR:
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> I am suddenly having intermittent problems with my Hermes.  It has 
> firmware 3.1, and I am using PowerSDR 3.2.24 (recently upgraded from 
> 3.2.21).  I've reset the database multiple times, and that doesn't 
> seem to have any effect.
>
> I am experiencing intermittent distortion where it sounds almost like 
> listening to CW or SSB with an AM receiver -- CW loses its beat note, 
> and SSB sounds very distorted and raspy.
>
> When this happens, the spectrum display changes to show a 
> higher-than-normal noise floor, with a series of sharp nulls across 
> the displayed spectrum.  I've uploaded two screenshots showing the 
> display when this happens to http://www.febo.com/pages/hpsdr/hermes/
>
> I can't figure out what causes it to occur; sometimes it's there when 
> I power on, other times it happens after several minutes.  I don't 
> believe it's heat related, but I can't definitely rule that out.
>
> I've been using this radio for a couple of years with no previous 
> problems, so this has me stumped.  I've removed all external 
> connections other than antenna and headphones to track down ground 
> loops, and that hasn't made any difference.  I'm using the internal 
> frequency reference.
>
> Any suggestions would be appreciated!
>
> Thanks and 73,
> John
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