[Lowfer] GPS Synced BPSK (GBPSK) copy of LEK in NC

[Dexter McIntyre W4DEX]

> Larry Putman WB3ANQ wrote:
>
> > Dex,
> > Were you gps synced for that copy?
> >
>
> 1pps from a Z3801A

Larry,

To be more specific:

My method uses unnecessary hardware but it was a quick and easy way for
me to get started.  I used a RS422 to RS232 Black Box converter.  The
Z3801A's 1 pps output on the DB25 port, pins 9 and 17 connect to the
send data pins of the converter.  This converter has a DB37 connector
and the pins are 4 and 22 with 19 as sig ground.  The converted signal
is then taken from the Black Box RS232 DB25 connector pin 2 and fed into
the computer com port Ring Indicator pin which is pin 9 on a DB9
connector.  Initially I had a positive going pulse.  I reversed the
RS422 polarity by switching the A and B send data pins.  That produced a
nice negative approximately 25 us pulse which seems to work well with
Africam.

>
>
> Dex
>
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