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Section 3 - Installation (ATSC EC701HP Transmitter)
3.3.2 Tower
For the installation of the TV transmission and reception system, the tower must be made with
hot-dip galvanized steel. A lightning protection system should be installed in the tower as well as
nocturnal beacons bulbs with red glass.
The following information about the tower must be obtained:
(a) It must be provided of special insulator supports for descent of cordage of lightning rod, with
a space of 1,5m maximum between them.
(b) There must be a lightning signaling system in every 20m along the tower.
(c) It must be painted with orange and white stripes in every 2m with a special paint that complies
with local regulations.
(d) It must endure winds of up to 150 Km/h.
In a retransmission station the tower is the highest and therefore, the most vulnerable device to
be hit by lightning and because of it, the tower is used as a part of the protection system.The
lightning protection device used in these cases is called lightning rod and has the function of
guiding the electrical discharge safely, avoiding other parts of the system to be hit and damaged
by it.
The use of a lightning rod is MANDATORY. The project and installation of grounding and lightning
protection systems must be performed by specialized companies. Eventual damage to the
equipment caused by missing or malfunctioning of the arrester is not covered by warranty.
3.3.3 Fastening of cables, antennas and connectors
Please observe the following items when installing antennas:
Direction of Antennas and Aperture Angles
Use a pocket compass when directing the antenna.Use a field strength meter for the fine
adjustment of the recepton antenna.
Height
It mainly depends on the receiving signal and the transmission conditions (obstructions, attended
area, etc). It's very important to verify how far the antenna is from the lightning protection
device, since the antenna must stay inside its cone protection.
Manual Rev. 0.0 - March 2018
3-2
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