Is this filter in the audio tx path, affecting AFSK tones generated by a
computer sound card, or is it only in the internally generated RTTY
capability of the K3?
73, Dave K2YG
========================================================
On 12/2/2014 6:59 AM, rtty-request@contesting.com wrote:
Message: 5
Date: Mon, 01 Dec 2014 15:58:48 -0500
From: "Joe Subich, W4TV"<lists@subich.com>
To:rtty@contesting.com
Subject: Re: [RTTY] RTTY Tx options - advice requested
Message-ID:<547CD688.3080604@subich.com>
Content-Type: text/plain; charset=utf-8; format=flowed
....
_You probably had CONFIG:AFSK TX = FIL On which inserts a narrow filter
around the selected tones__*in the K3 DSP Modulator*__. That does a very
good job of narrowing non-coherent AFSK and getting rid of any hum or
harmonics introduced in the audio sages_.
Unfortunately, that filter is unique to the K3 - none of the YaeComWood
transceivers offer such a filter - and maladjusted AFSK is worse than
the wider than optimal FSK they produce.
73,
... Joe, W4TV
_______________________________________________
RTTY mailing list
RTTY@contesting.com
http://lists.contesting.com/mailman/listinfo/rtty
|