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https://www.satsig.net/cgi-bin/yabb/YaBB.pl VSAT technology and installation >> iDirect Forum: hubs and terminals >> compatability of idirect on a mobile antenna https://www.satsig.net/cgi-bin/yabb/YaBB.pl?num=1190297530 Message started by satweb on Sep 20^th, 2007 at 3:12pm

Title: compatability of idirect on a mobile antenna
Post by satweb on Sep 20^th, 2007 at 3:12pm

Does anybody know how efficient/easy idirect modems are with mobile antenna that dont have built in GPS?

Title: Re: compatability of idirect on a mobile antenna
Post by TDMAMike on Sep 25^th, 2007 at 12:09pm

GPS is going to have to come from SOMEWHERE. �Your modem needs a NMEA string (from GPS) for it to determine its frame start delay (FSD) to get into the inbounds (return/upstream carriers). �Look for an external source.

Otherwise: No communication. �

Title: Re: compatability of idirect on a mobile antenna
Post by El Molino Systems S.L. on Sep 28^th, 2007 at 3:47pm

mobile antenna without GPS .................... sounds to us as a normal fixed antenna on top of a van :) It takes 2 to max 5 min. to point it manual without GPS if you have a good satellite meter. For automatic pointing you need ALWAY'S a GPS receiver connected to the antenna pointing unit.

Title: Re: compatability of idirect on a mobile antenna
Post by 400Degrees on Sep 28^th, 2007 at 7:52pm

I have a mobile system with an iDirect modem and switch. It also has GPS. Its a display unit but its priced right. check it out at

https://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=160162515368&ssPageName=STRK:MESE:IT&ih=006

Title: Re: compatability of idirect on a mobile antenna
Post by TDMAMike on Sep 29^th, 2007 at 9:12pm

Nice. I love Tracstars. Damn good system.