K3S USB soundcard mic always monitoring TX audio

[Nicklas Johnson]

While spending some quality time with the K3s tonight, I noticed that if I
switch on the "listen to" feature in Windows to listen to the USB codec
microphone audio through my computer speakers, I always hear the audio when
transmitting; ie, it behaves as though the audio being sent out the USB
Codec speakers is being monitored by the USB Codec microphone.

This was the case with the power reduced to 0, or with the unit in TX Test
mode, so I don't think it's RF bleeding through.

I also checked the MON setting and made sure it was on 0.  It had been on a
low setting when I was listening to transmit audio on the speaker plugged
into the K3S earlier.

What else should I check, or is this behavior expected?

   Nick

--
*N6OL*
Saying something doesn't make it true.  Belief in something doesn't make it
real. And if you have to lie to support a position, that position is not
worth supporting.
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[Nicklas Johnson]

Found the answer after doing a little more digging.  This is a function of
the CONFIG:LIN OUT:2 (or REV) setting, which was defaulted to 30 on my
K3S.  Setting this to 0 eliminated the Line Out monitoring of Line In.
This is discussed in the KE7X K3S book at the bottom of page 210.

The explanation in the book is that some contests require submission of the
audio of the complete exchange, so having this setting something other than
0 loops the audio back through Line IN so your computer's digital recording
software will capture it when you record from Line In.

   Nick


On Wed, 10 Oct 2018 at 22:29, Nicklas Johnson <[hidden email]> wrote:

> While spending some quality time with the K3s tonight, I noticed that if I
> switch on the "listen to" feature in Windows to listen to the USB codec
> microphone audio through my computer speakers, I always hear the audio when
> transmitting; ie, it behaves as though the audio being sent out the USB
> Codec speakers is being monitored by the USB Codec microphone.
>
> This was the case with the power reduced to 0, or with the unit in TX Test
> mode, so I don't think it's RF bleeding through.
>
> I also checked the MON setting and made sure it was on 0.  It had been on
> a low setting when I was listening to transmit audio on the speaker plugged
> into the K3S earlier.
>
> What else should I check, or is this behavior expected?
>
>    Nick
>
> --
> *N6OL*
> Saying something doesn't make it true.  Belief in something doesn't make
> it real. And if you have to lie to support a position, that position is not
> worth supporting.
>

--
*N6OL*
Saying something doesn't make it true.  Belief in something doesn't make it
real. And if you have to lie to support a position, that position is not
worth supporting.
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