[Elecraft] [K3]PSK31 & DM780

[Dave Van Wallaghen]

Thanks for the suggestion Steve. I usually default the NB and NR off 
until I need them and I rarely use them. But that makes sense.

As an update to this topic, first, thanks to everyone here who made 
suggestions. It was a great learning experience for me.

I did go back and adjust the input to my soundcard. It is on a laptop 
and the only input is a mic connection. Looking at the setup on the 
computer, I found that the gain was turned up all the way at 100% with 
some special processing enabled for voice. I turned it down to about 35% 
and disabled the special processing on the line.

I also found that my CONFIG: LIN OUT was set at 20! I don't know when I 
did that, but I went through the setup of my soundcard as Jim described 
by starting out with everything at a minimum. I then brought the levels 
up until I could see decoding with DM780. I then wound up with the 
CONFIG: LIN OUT setting at 4 with good decoding and no noticeable 
harmonics on the screen.

On my DM780 waterfall, the noise level is just visible on the bottom of 
the Spectrum & Grid window and weak signals are now fairly visible in 
the waterfall. The audio level monitor on DM780 now shows in the low 20% 
range as opposed to the upper 60's and occasional Overload as it did before.

As a test, I then worked back to back Italian stations on 40m at 30 
watts. Works for me :-)

Thanks again & 73,
Dave W8FGU

Steve Ward wrote:
> On Thu, 19 Feb 2009 17:59:38 +0000, Dave Van Wallaghen wrote:
> 
>> Has anyone else using DM780 with a K3 noticed that very strong psk sigs produce other images on the waterfall? It is about 2k further up or down from the original signal and can be decoded on the screen although weaker. I'm also running LP-Pan but don't notice the images on the panadapter.
>>   
> Also check your NB settings, I've found that the more aggressively the 
> noise blanker is working the more likely the ghost signals are to 
> appear.  OTOH, I have not yet gotten to the AF mods so I am probably 
> seeing a combination of factors.
> 
> 73,
> Steve
> AD7OG
> K3 S/N 1544
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