Phil,

Thanks for the feedback on your Placer 400.  I finally figured out
why I was getting the messages re battery backup.  I had connected
the main power and the back up power at the same time.  Although
I had turned GPPSK.EXE on and off many times, I had never turned
off the main power, leaving just the battery backup to run the
system.  Until you do that once, the system doesn't know that there
is a battery backup installed.

Will the unit run OK from the 12V car lighter socket, or does the
voltage need to be conditioned with a DC-DC converter?

Is GPSSK.EXE the program you used at the Geysers?

Some time ago I looked at pin 9 on the scope.  There was a very short
spike every second.  I was hoping to be able to count up perhaps
15 minutes of spikes and then put out a 15 minute mark (trace offset)
on my digital record.  This would give me a clock correction every
15 minutes.  The problem is that I don't know how to build such
a circuit.  Any ideas out there?

Cheers,
John

PS. Re the NEIS web problems, I know that there were network
problems in the building yesterday.  They must have gotten worse!

At 08:07 AM 6/30/99 -0700, Phil wrote:
>Hi John,
>    I bought a Placer 400 some time back with plans to use it with my
>remote gear for both location accuracy and time lock. I used it once on
>a trip to the Geysers just for a location fix when I first got it to try
>it out and it worked great. I have plans to tie it into my recorder for
>time locking, but I've been busy and haven't gotten back to that
>project.
>    I sort of remember that as long as the back up battery (the 9v one)
>is good it is suppose to fire right up and remember where it was last
>and the time should be fairly close so that it will update quickly....

>... what does your 1 second pulse look like on that pin.
>Mine is a very short very low level differentiated pulse or spike like
>looking thing....


* John C. and Jan H. Lahr                 *
* JohnJan@........                        *
* 1925 Foothills Road                     *
* Golden, Colorado 80401-1718             *
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* http://giseis.alaska.edu/lahr           *

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