Hello,Robert.. I have contacted you off list with regards to this : )
Thanks in advance... On Fri, 2010-07-09 at 11:41 +0000, Robert Atkinson wrote: > Hi Chris, > You need the LVC to make sure you have the 1PPS available. The PC may have it > in the cable but you can't be sure. The 18X is OK for NTP but a timing GPS in > position hold is better. > The Tbolt is good but has a ovened 10MHz oscillator that you don't need > unless you want to keep time when the GPS is down. The Trimble Palisade (now > Acutime2000) is designed for this application. > I can supply a used one for £50 but you need to be able to knock up a power > source and RS422 to 232 converter (probably not needed to the SPARC box). > Manual is here > http://www.dc2light.pwp.blueyonder.co.uk/Webpage/PALISADE-Manual.zip > > Robert G8RPI. > > > --- On Fri, 9/7/10, Chris H <[email protected]> wrote: > > > From: Chris H <[email protected]> > Subject: Re: [time-nuts] GPS Timing Source -- looking at buying > To: "Discussion of precise time and frequency measurement" > <[email protected]> > Date: Friday, 9 July, 2010, 8:54 > > > > > Which is the 18X and looking at the manual for it, it says it's 1pps with > > > 1 > > > microsecond accuracy. > > > > Yup. That URL is for the LVC version. The PC version is the one powered > > from a cigarette lighter. (Your first line above says PC when I assume you > > mean LVC.) > > Sorry -- I had book marked the PC version -- but when I noticed the LVC > version, I checked the website, and they have them with bare wire -- so > no plugs at all.. > > > > I am not really sure what to do -- and I have followed the mail list for a > > > while, but I think I might be looking in the wrong place... > > > > Did you check the URL I sent? And the ones at the bottom of that > > page? > > Yes -- that page looks fantastic, I am going to use that as my reference > guide :) when I actually get to put it all together... > > > Look at the picture, or get the manual from the Garmin web site. The LVC > > comes with a connector so they can test it. You cut it off and wire it to > > a > > DB-9 and supply power one of several ways. Then plug it into your serial > > port. > > > > > > > I perhaps need to join an NTP mail list .. > > http://lists.ntp.org/listinfo/questions > > It's gatewayed to usenet:comp.protocols.time.ntp > > > > Check out the archives. > > > > > > > When you say 'more sensitive' what do you mean by that? > > > > Where are you going to put it? The GPS antenna is built into the > > hockey-puck. You need to get the antenna into a good-enough position. > > "more > > sensitive" means it's easier to find a location that's good enough to get a > > useful signal. > > > > Trees are bad. Houses are bad. Mine mostly works inside my house. It > > would > > work better if I put it outside. > > I guess they are weather proof..... > Looking at the wiring diagram at the bottom of that page, it appears > (and correct me again if I am wrong) I can run it down CAT5 cable, and > 'i guess' that the 5meter limit on USB is just data, not power?? so Run > power down the CAT5 and bring the serial data back down as well - or I > might just need to put a power injector closer to the unit if I cant get > USB power that far as computers are about 20 - 30 meters from where the > best position is for the unit. > > It will be put on a pole on the edge of the house, that has full clear > coverage of the sky - where my Discone antenna sits :) - very little > trees from that angle and no houses close by :) > > > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
