[Fwd: Re: [GreenKeys] USB-to-serial adapters, and baudot]

[gil smith]

Hi Les:
Another workaround would be to connect the TD to TTY-Connect (either on a 
loop, or the TU232 port, depending on the TD), and let TTY-Connect convert 
the data.  The TD can run baudot at any speed, and the PC232 port is always 
38400-baud ascii (so the USB adapter will work).

The baudot-to-ascii conversion in TTY-Connect, retains individual CR and LF 
codes (so overstrikes will not get screwed up), and it can optionally 
retain all FIGS/LTRS codes as well (converts them to SO/SI).

The ascii version of the tape file can, of course, be sent back out to 
ttys, with the opposite conversion.  It's all automatically done for 
you.  You can just use a terminal program (even Hyperterminal) to capture 
the data to a file.

gil


At 05:52 AM 3/9/2005, Veenstra, Lester wrote:

>One of my first ideas was to run at a higher baud rate
>with elongated stop forced on the TD.
>However The TD I have on hand is 45 baud, and
>the best gears I have on hand would only get me to 75B.
>
>I do have two workarounds, although it would be nice
>to actually use the USB dongle and laptop at 45B  7.45 code.
>
>Work around (1) is to use the desktop with the
>hardware built in. I have not done this yet but it should work.
>
>Work around (2) is to feed the bipolar RS-232 signal
>I generate from the TD into either a DC coupled FM
>Modulatable RF signal generator or into the "VCO"
>input of an audio function generator.  I have actually
>done both of these and been able to generate 170 Hz
>shift FSK that I then demod and capture with MMTTY or MixW.
>
>Now I still have to get this 28TD working right
>as it has a few bits out of spec.
>
>Lester Veenstra
>Senior Engineering Program Manager
>Intelsat General
>6550 Rock Springs Drive, Suite 450
>Bethesda Maryland, 20817
>+1-301-571-1212
>e-mail: lester.veenstra at intelsatgeneral.com
>
>-----Original Message-----
>From: H.E. Robert, [Just Bob!] [mailto:robert at ameritech.net]
>Sent: Tuesday, March 08, 2005 11:28 PM
>To: Veenstra, Lester
>Cc: greenkeys at mailman.qth.net
>Subject: Re: [Fwd: Re: [GreenKeys] USB-to-serial adapters, and baudot]
>
>Les,
>
>Well Sir, that still seems like a noble task to me!   And I have a couple 
>of off-the-wall ideas you may
>want to consider ...the first and simplest, is to print them out on page 
>printer, 15, 28, 32, whatever,
>and scan them in to a PC with OCR software, I've even seen tty fonts 
>available so you could laser
>print them, and still maintain the look & feel of a "real" printer.
>
>The second is to read the 5 level tape in an 8 level reader, 33, 35, 43, 
>or some higher speed CNC
>tape reader, then write a little program, in BASIC or C, or Shell, 
>whatever your poison, to read a character,
>bit shift, truncate as necessary and convert the string to ascii, and 
>preserve it for posterity, .....or until the first
>....................  .
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>GreenKeys mailing list
>GreenKeys at mailman.qth.net
>http://mailman.qth.net/mailman/listinfo/greenkeys



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