Topcon A3524, Руководство пользователя

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6-6
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Topcon GPS Manual
UHF Collinear Antenna
The Hiper-AG fixed Base Station will transmit to its maximum range if
it is connected to a series-fed UHF Collinear Antenna (see “UHF Col-
linear Antenna Cable-RG213”, page 6-11).
UHF Collinear Antennae are custom-tuned to the user’s frequency and
are constructed for null fill coverage and optimized range, for sites that
have an average height above ground level of less than 2000 metres.
The Collinear Antenna should be situated as high as possible, so that it
has unobstructed transmission coverage over buildings and trees. With
radio transmissions, height above local terrain is the most important
factor limiting range. Usually the antenna is fixed to a customer
supplied pole/tower, either freestanding or on the top of farm
outbuildings to gain the required height and better line-of-sight.
Figure 6-5. UHF Collinear Antenna
Collinear
Antenna
Lightning
Arrestor
U Clamps