[Elecraft] K3 psk D splater

[Luis V. Romero]

Im wondering two things:

- How much power output was the K3 in question operating PSK at?  PSK is
really picky about transmit IMD.  IMD increases with power output from any
rig, K3 being no exeption.

- Did the station that complained about "splatter" have his noise blanker
and/or preamp turned on?  If so, the problem might be on the receive end of
the path.

Both issues beg to be investigated.

And yes, with direct PSK-D modulation, the soundcard output from the K3 is
moot, however, the soundcard input to the complaining station is not moot,
in fact, it is critical, as pointed out by K9YC.  

Levels are.... 

-lu-w4lt-
K3#3192


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Message: 12
Date: Wed, 30 May 2012 15:17:30 -0400
From: dmoes at nexicom.net
Subject: Re: [Elecraft] K3 psk D splater
To: <elecraft at mailman.qth.net>
Message-ID: <4fc6724a.5350.42e76940.27dc6700 at nexicom.net>
Content-Type: text/plain; charset=us-ascii; format=flowed

Hi Jim   Thanks    good tips but Keep in mind I am using PSK-D  where 
I am sending serial data to the K3 and letting it do the modulation.  
so there is no audio path from the PC into the K3.       before I had  
the K3 using the sound card was my only option  and even now when 
using AFSK to the K3  I dont believe I have an issue.  It was just 
when I tried to let the K3 handle the modulation that I got this 
response  and as others have pointed out it is very possible y that 
there is someting at his end.   I was just wondering though if there 
was someting I can do to controll the IMD at the K3 when using PSK-D 
as opposed to PSK-A



David Moes
VE3DVY