I've been looking into the http://www.polyphaser.com/productdetail.aspx?item=DGXZ%2b15NFNF-A And so far have been happy with the construction, and data specifications. It's any easy install, and the price is pretty reasonable.
Raimond -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Friday, February 29, 2008 05:21 To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] GPS-Attached Equipment Lightning Protection I'm not using any at the moment, but then all my GPS antennae are indoors (long story!). Have been involved with supplying protection to clients over the years, and in the main, have been RF surge suppressor devices such as used by Meinberg http://www.meinberg.de/english/products/cn_ube.htm http://www.meinberg.de/english/products/cn_ube_280.htm and others. For straight RF feeds these are by far the easiest to implement and provide good protection. For GPS systems which utilise "smart antennae" i.e. the antenna also houses the receiver module, and the down cable contains data plus a 1PPS, then opto-isolation or a fibre optic link is the only real way to protect your real estate on the ground. Rob Kimberley (in UK) -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Matthew Smith Sent: 28 February 2008 21:40 To: Time Nuts List Subject: [time-nuts] GPS-Attached Equipment Lightning Protection Hi Folks Is anyone implementing any form of lightning protection for their GPS-attached equipment? If my antenna gets struck or we have a nearby hit (nearest strike to ground since we moved here was about 470m away, IIRC), I would like to limit the damage to the GPS module. My thought was to stick an optoisolator or similar between the serial and PPS pins and the level converter (MAX232 equivalent) and power the GPS module itself with one of those little Meanwell high-isolation DC/DC converters. This is very similar to what I am planning to do with the outside components of my 1-Wire weather system. I'd be interested to know what everyone else is doing in this respect (if anything). Cheers M -- Matthew Smith Smiffytech - Technology Consulting & Web Application Development Business: http://www.smiffytech.com/ Personal: http://www.smiffysplace.com/ LinkedIn: http://www.linkedin.com/in/smiffy _______________________________________________ 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.
