Re: ANN: mt63lx version 0.5

[chuck gelm <chuck@gelm.net>]

Matti Aarnio wrote:
> On Mon, Jul 12, 2004 at 11:05:10PM -0400, chuck gelm wrote:
> 
>>I have seen mention of this "MT63" every few weeks or months here on the
>>linux-hams mail list.  Where can I obtain a description of what MT63 is
>>and what hardware it requires?
> 
> 
>   "Multi-tone 63" -- description was attached there in the announcement.
> 
>   Instead of the stand-alone implementation (that was announced), you
>   should try  gmfsk:   http://gmfsk.connect.fi/
> 
>   You need an SSB radio, and decently precise sampling rate in your
>   audio card.  (better than 10^-4 precise.)
> 
>   And some sort of PTT command interface circuit.  Possibly galvanic/opto
>   isolation in between the computer and radio.
> 
>>Chuck nc8q

> 73 de Matti, OH2MQK

Thanks, Matti:

  It felt to me that the accompanying description was vague and/or
arbitrary.  As though it may have been written for developers or
those already familiar with the function and purpose of MT63.

"...
The MT63 modem is made for single side band operation. The audio
generated by the modem (sound card output) is applied to the SSB
modulator. On the receiver side, the output of the SSB demodulator
is put into the sound card input. ..."

  Am I correct in assuming that 'SSB modulator' is not SSB microphone
input and 'SSB demodulator' is not SSB speaker output.

  Thus,
I am still uncertain if I have or will obtain the necessary hardware.

  Also,
I didn't see any mention of kernel version or CPU speed or tools or...

  So,
is there a linux software map (?.lsm) in the distribution?
Is there a more detailed hardware requirement description?
Kernel version?
Compiler and/or linker?
What distributions (and versions) is it known to work with?

Regards, Chuck nc8q