[time-nuts] Hand Held GPS

paul at greenrover.demon.co.uk paul at greenrover.demon.co.uk
Sun Jun 28 07:31:36 EDT 2009


David McGaw wrote:
> As I found, do be aware that the Synergy VIC-100 (58532A clone) does not 
> like 3V.  Does anyone know if the 58532A fairs better?  However, my 
> experience is that the Synergy Timing 3000 is better, even though it is 
> also rated for 5V only.
> 
> I happen to have just bought a Garmin GPSmap 60CSx myself.  It is nice 
> that it spits out NMEA-0183, though the serial string is not timed well 
> to the internal 1PPS - delayed and jittery.  :-(
> 

Hi David

What happened here is that the mcx connector and lead worked ok. But 
much out of boredom than anything else I also made an adapter with a 
tail cable to a small box and put a 5v current limited reg in it. Pick 
up the BTS 24v dc from the site and then used it that way. On the site 
antennas that we use 3V seems to do the trick but the dc insertion of 5v 
makes sure.

There are far better people on this list to advise on the jitter - not 
me ..... but out of curiosity is the jitter on the usb connection or the 
rs232 connection, I *thought* I read somewhere that the USB isn't the 
best way to do it?

Regards Paul

-- 
73 de Paul GW8IZR IO73TI
http://www.gw8izr.com




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