Gil,
You do not need a SignaLink box to use any data modes, including RMS
Express - just feed the audio in an out to the soundcard.
You may need a galvanic isolator (transformer) between the KX3 and the
soundcard to improve the signal to noise ratio and reduce "ground loops".
The audio level considerations are important. Many laptop soundcards
have only mic level inputs and the KX3 headphone output level will
overdrive it without an attenuator. Going the other way, the soundcard
Line out is at too high a level to directly drive the microphone input
of the KX3, so again an attenuator is required.
The advantage of using an interface device like the SignaLink (or
others) is that they do provide not only an external USB soundcard, but
also the galvanic isolation and the level conversion.
73,
Don W3FPR
On 2/8/2013 6:49 PM, Gil G. wrote:
Hello,
I am wondering if I really need a Signalink USB box to use RMS Express…?
Wouldn't just the audio input/output work?
Or, can the USB cable that comes with the KX3 for firmware updates be used?
Any suggestion would be appreciated, thanks,
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