PSK31 & DM780

Posted by Dave Van Wallaghen on Feb 19, 2009; 5:59pm
URL: http://elecraft.85.s1.nabble.com/PSK31-DM780-tp2354428.html

This probably more DM780 related than K3 but as a newbie to digital modes I thought it might be related. Then again it may be my soundcard too.

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 related, do strong signals wash out the waterfall display so that weaker ones vanish?

I do center signals I wish to work and cut the filter down to 500hz or so to avoid strong signals in the passband and most of the time it works great.

I'm just wondering if this seems normal to everyone else or do I have something adjusted incorrectly? Overloading my soundcard maybe?

Transmit seems to work FB as I get good signal reports (stating my signal looks clean) and I'm seeing IMD measurements ranging from -28 to -31 on the KK7UQ IMD meter.

Thanks & 73,
Dave W8FGU
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