RTTY &/or Morse code decoder implementation
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Posts: 46,084
Hi stamp group,
Has anyone or does anyone know if the stamp has been used for decoding rtty
signals, pactor, packet, amtor, fsk, fax, morse etc.? Is it possible, or is
the need for accurate timing/memory space/speed a drawback? Could an
external clock input be utilised to overcome this? Lots of questions, I just
wonder if this would make a neat portable project with the stamp and an LCD.
Any ideas??
Best wishes,
Steve Pocock
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Has anyone or does anyone know if the stamp has been used for decoding rtty
signals, pactor, packet, amtor, fsk, fax, morse etc.? Is it possible, or is
the need for accurate timing/memory space/speed a drawback? Could an
external clock input be utilised to overcome this? Lots of questions, I just
wonder if this would make a neat portable project with the stamp and an LCD.
Any ideas??
Best wishes,
Steve Pocock
_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp
Comments
>Has anyone or does anyone know if the stamp has been used for decoding rtty
>signals, pactor, packet, amtor, fsk, fax, morse etc.? Is it possible, or is
>the need for accurate timing/memory space/speed a drawback? Could an
>external clock input be utilised to overcome this? Lots of questions, I just
>wonder if this would make a neat portable project with the stamp and an LCD.
>Any ideas??
Morse code sending has been discussed and a program to do it has been
posted here. I can mail you a copy if you wish.
Morse code receiving has been discussed, but no one has reported any
attempt to implement it on a Stamp. I can send you a description of a
possible approach to it, but there's no program code.
It's probably possible to implement RTTY/AMTOR/PACTOR in one of the most
capable versions of the Stamp. I'd guess you can buy a cheap FAX machine
for less than the price of the hardware needed to build one based on a
Stamp. Packet is CPU intensive and depending on the frame size could be
memory intensive. It's a synchronous protocol so it would need an external
clock. I think you'd need to implement a state machine to deal with it
reliably. FSK is a modulation method that could be used to send any of the
above communications protocols. It is not a protocol itself.
Often the design and building is the goal vs the having, but if you just
want to have the capabilities above, look on eBAY for an amateur radio
terminal node controller (TNC). There are some that I will do all of the
above. The FAX they do is weather fax, also known as WEFAX, not what most
people think when they say FAX.
There are also programs designed to use your PC's sound card as an
interface to handle several of the above protocols. You could search on
google.com for words like "ham radio sound card software" and find quite a
few references.
73 de Jim, KB3PU
www.al-williams.com . I have seen this type
project in QST magazine (dont know if they have a web page) also you might look
at www.arrl.com .
Steve Pocock wrote:
> Hi stamp group,
>
> Has anyone or does anyone know if the stamp has been used for decoding rtty
> signals, pactor, packet, amtor, fsk, fax, morse etc.? Is it possible, or is
> the need for accurate timing/memory space/speed a drawback? Could an
> external clock input be utilised to overcome this? Lots of questions, I just
> wonder if this would make a neat portable project with the stamp and an LCD.
>
> Any ideas??
> Best wishes,
> Steve Pocock
>
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