Hi again John and All, Yes, the Placer 400 runs nicely from 12 vdc. It was originally designed to be used in commercial vehicles to track their locations, so it's a happy guy on 12 volts. I used the GPSSK software to get a readout of my location and a time setting when I used it at the Geysers. But, I didn't have my recorder locked to it because my system is currently setup to do WWV tone lock. I did use the time reading from the Placer though to set the computer clock as I couldn't pickup WWV where I was. Now don't hold me to this, but I don't think you will need the GPSSK software running if you are just going to be using the Placer 400 for time lock once the receiver is locked up. Reason being, I'm almost positive that the 1 second pulse comes out even without that software running. I do think, however, that you will have to clean up the 1 second pulse some though before you can use it to trigger a counter or other digital circuitry properly. Especially now that I hear your 1 second signal is kind of crummy looking too. Phil _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>