User's Manual

FT-512 Trailblazer Installation and User Manual version 1.08 34
Marketing and sales channels
CWT DOES NOT sell the Trailblazer PRO direct to end users. i WLL Trailblazer
PRO System will be sold only to CWT's Authorized Resellers. Those authorized
resellers are technically trained by CWT's Engineers periodically and must follow
the rules set by CWT. The Trailblazer PRO system is designed for Long Range
(15-35 miles) applications and it involves a complicated mandatory site survey,
roof top mast installation, high gain antennas, accurate antenna alignment, etc.
Those activities can be done ONLY by professional installers that are familiar with
the FCC regulations. CWT does not sell the Trailblazer PRO in the consumer
business at all. We have no resellers in this market and we do not advertise in
consumers based publications or attend consumer oriented trade shows. The
system will be advertised in technical trade shows and magazines.
5.1.6 Mounting
Rough alignment. This is usually easier then it would seem. Since it is a
prerequisite that you have line of sight between the two points, here are several
ideas that have worked for installers:
(1) If you can see the other unit, simply aim the units towards each other. (2)
During midday, use a mirror or compact disk to create a reflection approximately
towards the other site while someone watches for the flash.
(3) Plot out the path on a topographical map and set the antennas using a
compass.
How close in alignment do they need to be? +/- 10 degrees will be adequate for
most paths using the 14 dB gain antenna. Certain paths that have a low fade
margin may require a more accurate setting.
Alignment indicators: Due to the nature of digital modulation and the associated
circuitry, there is not analog test point where signal strength may be monitored.
Rather, the bit error rate may be monitored on the digital board. With an ideal link
errors will not be encountered and the LED will not illuminate. If there are
obstructions or interference in the link this LED will begin to blink. The rate of flash
is an indication of a degraded link with a higher flash rate indicating more errors
and hence a poor link.