TOPCON GPS TECHNOLOGYNow, you have a basic understanding of how

the system works, and while we have tried to keepit simple, it really is quite complicated. Thats onereason why so few companies have the ability tobuild real-time, high accuracy receivers. Topcon isproud to be the leader in this field of technology.Along with leadership in optical surveying instru-ments, construction lasers and equipment automa-tion systems, Topcon is the only company in theworld that focuses exclusively on high-precisionpositioning products for all civil engineering appli-cations.

Creating solutions for your positioning prob-lems and increasing your productivity is what we do24/7. Its our passion, and we think we do it betterthan anyone else. Just like our GPS+ technology isbetter than ordinary GPS.

So what is it exactly? Its everything ordinaryGPS is plus!

Paradigm Chip

Co-Op Tracking

Fast Initial Acquisition and Re-Acquisition

Multipath Reduction

Antenna With High Phase CenterStability

In-Band Interference Suppression*

GLONASS*

Paradigm Chip

At the heart of every Topcon GPS+ receiveris its advanced Paradigm chipproviding anamazing 40 channels of signal reception(compared to ordinary GPS manufacturersmaximum of 24 channels). With itsadvanced design, the Paradigm chip alsodraws less power than any other designs,allowing our receivers to run longer so youcan stay in the field without delays torecharge or replace batteries.

* Optional, activation fee required

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Co-Op Tracking

Topcons patent-pending Co-op Trackingallows you to go places and work accuratelywhere no other manufacturers receiver can.So what is co-op tracking exactly? The bestto way to explain it is with an example. Haveyou ever tried to track a star at night usinga pair of binoculars? Pretty easy, isnt it?Now, get in the bed of a truck and try totrack that star as youre driven across abumpy field at 20 mph while going undersome trees! Still able to track the star? Noway.

Well we have invented a unique way to usethe satellites with their extremely preciseand predictable orbit (position) to look backat the roving GPS+ receiver and keep it init's field of view at all times, and when it dis-appears under tree's or behind a building fora few seconds, to immediately pick it upwhen it reappears, hence the term co-optracking. The receiver and satellites are co-operating to perform this advance track-ingcapability, something no one else has!

Ask your Topcon rep to demonstrate this fea-tureits truly amazing, even more so if youknow how limited ordinary GPS is in thesesituations. The more you know about GPS,the more youll know you need Topcon GPS+!

Fast Initial Acquisition andRe-Acquisition

When you first turn on your GPS receiver itmust acquire, or find, the satellites. Topcons40-channel Paradigm chip has four correla-tors per channel and, during the initialsearch, each correlator acts as a channel tohelp find the satellite signal. Compare this toordinary GPS normal 24-channel receiverwith no additional correlators and its easyto figure out GPS+ is 7 times faster at initialacquisition (40 x 4 = 160, 24 x 1 = 24)!

This feature, along with co-op tracking,allows GPS+ to re-acquire satellites almostinstantaneously (one second) should youever lose acquisition. Consider how nice itwould be if your personal computer poweredup 7 times faster, and anytime it froze itwould restart instantly. Thats what TopconGPS+ gives you compared to ordinary GPS,and thats more up time for you and yourmachines!

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Multipath Reduction

Using our advanced algorithm techniques,we are able to practically eliminate theerrors caused by signals bouncing off objectssurrounding your job site.

Antenna With High PhaseCenter Stability

Topcons patent-pending, high precisionPhase Centered Antenna eliminates all sig-nals except those coming from the GlobalNavigation Satellite System, ensuring high-est order of accuracy.

In-Band InterferenceSuppression

With the world of wireless communicationsgrowing rapidly, more and more opportunityfor in-band interference of the GPS signalcan occur. To keep that inference out, wehave created a unique (patent pending) In-Band Interference Suppression capability (upto 60db for U.S., up to 30db for internationaldue to export control laws that require alicense for our unique technology outsidethe U.S.). Just like co-op tracking, this allowsTopcon GPS+ receivers to work in environ-ments where ordinary GPS cannot.

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