[amsat-bb] Re: Icom PCR-1000 PC controlled receiver
nate at natetech.com
Fri Feb 9 14:46:52 PST 2007
On 2/9/07, Robert Bruninga <bruninga at usna.edu> wrote:
> Does anyone have a PCR-1000 ICOM remote controlled receiver?
> How long can the serial port cable be? I heard it was operating
> at something like 112,000 baud and could not be run the 200 feet
> to our roof. This makes it a deal breaker.
Was the limitation the RS232 being voltage-based, or was it a timing thing, Bob?
There are commercially-available converters to go from voltage-based
"RS" standards to current-based ones if it's just a distance
limitation brought on by the low voltages and cable loss.
I would think as long as you could get the signal there and back,
since RS232 is asynchronous -- the converters would work.
(But you probably already knew that...)
I just Googled for "RS232 extender" and this comes up, for example:
They don't say, but they're probably just converting from RS232 to
RS422 or RS485.
Googling "RS232 to RS422" yields this:
And it actually says it supports the speed you need.
Those are cheaper. Gotta love anything at a website called
Only worry would be timeouts in the application layer of the protocol,
and I doubt at your distances it would be a problem. Can you get
power up on the roof or nearby enough to power the remote converter
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