Good article.
I put my service monitor on to the HAL ST-6 just to
see how *tight* the filters are.
Mark 2125 Hz would drop out +/- 10 Hz.
Space 2295 Hz drops out at +/- 12 Hz.
the other 2 are 11 and 10 Hz..
I tuned these boards at work. The lab at then McDonnell
Douglas with the best
--- John Becker [EMAIL PROTECTED] wrote:
Good article.
I put my service monitor on to the HAL ST-6 just to
see how *tight* the filters are.
Mark 2125 Hz would drop out +/- 10 Hz.
Space 2295 Hz drops out at +/- 12 Hz.
the other 2 are 11 and 10 Hz..
What do you mean by drop out ?
I wrote an article on my digital setup a few months
back on eham.net. http://www.eham.net/articles/8616 .
This setup incorporates my old PK-232MBX, a HAL
ST-6000 Terminal Unit, and a sound card modem. This
allows access to all digital modes with the notable
exception of propriety modes of G-tor,
Is this thread: THEM vs US ? I got here late because McAffee SPAM
KILLER was killing this reflector's messages .
John: Are you saying that 40% of the tones are generated out of spec?
I have not ever owned a TNC; however, I have managed to decode RTTY
signals that are playing within the
--- John Becker [EMAIL PROTECTED] wrote:
Do I understand this right that the sound card
programs
don't care what the freq of the tones are, just as
long
as the shift is right?
Not only programs, but hardware tooI built a modem
with 2000-2200 Hz tones that worked very well on
packet
I use my KAM frequently; WinWarbler lets me run MMTTY and the KAM
simultaneously, providing diversity decoding of one signal, or the
ability to copy both a DX station and his/her pileup.
I also have a PK232 and an STSII-e; I use the latter for Pactor, and
(rarely and somewhat perversely) PSK31.
I have several TNC's and oh no, several terminal units
as well. I also have a sound card setup in the mix of
digital equipment. You can't do ARQ modes with a sound
card except for HFTerm which required Linux and as it
locks the OS from running any other programs you might
as well run Terman93
When was the last time you used that sound card and had a
ARQ Amtor or a Pactor ARQ QSO ? You can't do that with a
sound card.
I have been playing with a linux program but even it's only about
42% of the 100% of the TNC..
BOTTOM LINE:
your sound card just can't cut it.
And when using my ST-6 TU
Even when I used the TNCs , I didnt used AMTOR or PACTOR. So, havent lost
anything there. I seem to be able to copy many more signals now, than when
I was using them too, mainly becuase there are many more signals there. The
sound card programs have opened up the world of digital to most hams,
