[Elecraft] K3S Computer Audio Question with Sub RX installed

[Larry Gauthier (K8UT)]

To expand on Rich's comment:

The comments thus far focus in the benefit of receiving two frequencies 
simultaneously. Another benefit for digital modes is being able to receive 
THE SAME signal (frequency) but through two antennas with two receivers, two 
digital programs (can be the same program twice or dissimilar apps), two 
decoder filters - improving your chance of solid signal decoding under 
marginal conditions. See the K3 instructions on Diversity and Link AtoB for 
information on how to automatically track vfoA's frequency on vofB while 
tuning.

-larry (K8UT)
-----Original Message----- 
From: Richard Ferch
Sent: Thursday, February 04, 2016 8:36 AM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3S Computer Audio Question with Sub RX installed

Fldigi versions since 3.22.06 have the capability of decoding from
either the left or the right channel of a sound card. You can use a
command-line argument to tell fldigi which configuration files to use
You would run two instances of fldigi with different configuration
files, one configured to use the left channel of a sound card on receive
and the other configured to use the right channel of the same sound
card. With this kind of setup there is no need for two sound cards.

Programs like MMTTY that store their configuration information in a file
in the program directory can also be used for dual receive. Simply set
up two separate copies of the program in different directories, and then
configure them to use the left and right channels of the sound card
respectively.

For basic dual RX receive that's all you need. Rig control and transmit
capability add complications that depend on the specific hardware and
software you are using. Note that if you want to be able to transmit on
the VFO B frequency, both receivers must be in the same band. This is a
transceiver limitation - the K3/K3S will not do cross-band transmit.

73,
Rich VE3KI


AE6JV wrote:

> You need a way to separately decode both the left and right
> audio channels. I use cocoaModem on the Mac to decode two RTTY
> signals. Usually that's the DX and the pileup. I think there are
> also some windows programs which will do this dual decode. Are
> there any Linux programs which will do it? I can't find out how
> to do it with fldigi.
>
> For maximum flexibility, you will need two sound cards assigned
> to two separate programs.

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