); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] In a message dated 18/07/2007 21:25:35 GMT Daylight Time, [EMAIL PROTECTED] writes:
I wouldn't worry too much about not having TRAIM. As long as your GPS has a good view of the sky you should be alright. If you really need a higher-end receiver then there's the newer M12M-T. Do you have any pictures of the adapter board / product? I'm curious to see what it looks like. ---------------- Hi Jason I don't really need anything any better right now, just being greedy:-) Although it would have been nice to have the extra timing options I'm just pleased to find I have the PPS output after all. With most of my test gear in storage right now, including Z3801A and other references, I was looking for a quick way to check out a Parthus GPS standard that hasn't been behaving quite as I expected. The QEX project from last year seemed to offer an ideal solution, without the output dividers/drivers it's just one PIC, one op amp, and a level shifter..... if you don't count the GPS receiver and an HP 10811 that is:-) The unit I'm using was marketed around 1996 by Maplin Electronics in the UK as their "GPS Development System". I bought this one recently from a company who had it as left over NOS, they used them in 1997 as accurate timing sources for lighting/effects in a theme park. Maplin are quite a large retail chain in the UK, similar to RadioShack but without the radios:-), and they also published a magazine at the time. I think this may have started as a magazine project that they decided to market as a finished product. Basically, it's just an Oncore on an interface board that contains a MAX232 IC and a 5 volt regulator. I suspect it's very similar to the Motorola evaluation kit. It's put together quite nicely in a small extruded case but doesn't seem to be very well designed. To start with, they rate the supply from 8 to 16 volts with a 16 volt electrolytic across it. Probably ok, but I prefer a margin so changed it. The electrolytic across the negative 8.5 volt output from the MAX232 was the wrong way round, I thought it was a one off until I found the PCB marked up that way. And finally, as I mentioned earlier, the front panel screening is wrong. Other than that, it seems ok:-) I've got a photo of the outside but that doesn't tell you much so I'll take some pictures of the PCB etc and let you have those later. I'll also try to provide a copy of the interface schematic. regards Nigel GM8PZR _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.