Tim,
The default bandwidths are to work well with the internal decoder where
you tune to the desired signal with the VFO,
If you are using a computer application, widen the bandwidth and let the
software application do the decoding.
73,
Don W3FPR
On 3/28/2016 8:57 PM, Tim Henrion wrote:
On Mar 28, 2016, at 7:46 PM, Don Wilhelm <[email protected]
<mailto:[email protected]>> wrote:
Note that the default bandwidth for DATA A and AFSK A data submodes
is narrow on the KX3.
Another one for the ‘Feature Request’ list. The “audio” data submode
bandwidths are way too narrow out of the box. Does anyone have any
idea why this is? I’m not sure I see much of a reason for any audio
filtering at all other than the traditional 3K roofing filter. The
downstream PC is going to do its own audio filtering at the DSP level
before decoding the data anyway.
For the OP: If you like to tweak hardware, there are a number of
performance improvements that can be made to the SignaLink USB
hardware. Out of the box, its got a pretty high noise floor and is
susceptible to noise on the USB +5 line, which directly feeds the
onboard amp bias network without NO filtering.
http://www.frenning.dk/OZ1PIF_HOMEPAGE/SignaLinkUSB-mods.html is a
good place to start if you’re interested in better performance from
your SignaLink.
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