On Wed, 20 Oct 1999, Kai Schulte wrote:
>
> On Tue, 19 Oct 1999, Thomas Sailer wrote:
>
> > Does the hamcomm interface have a demodulator (like the DJ6HP
> > filter converter) or is it really just a zero crossing detector?
>
> Yes, it is just an op-amp. All it does is amplify the input and cut
> the output off at rs232 signal levels (it is powered from
> the serial interface, one handshake output line clamped high, the
> other low). You receive the resulting pulse through one of
> the input handshake lines, so any information about the signal
> has to be "guessed" from the lengths of the measured intervals.
And what about using the Baycom-like demodulator (a TM3105 i think) or
another to de/modulate the rtty signals (as well as packet i think :) )???
>
> It's pretty ridiculous by today's standards, but before sound cards
> became cheap it was a very versatile fm-tool indeed (provided you
> were dealing whith strong signals).
In a previous mail i read : "...Linux is multitasking..." Yes.
And if I want to work on rtty () and play some music at the same time ???
I'm working on rtty, and my mother is playing some CD on the box for
example...is it possible??? I think not.
73 fm IW4DSU Chris
