2-2
888-2463-001
3/6/08
WARNING: Disconnect primary power prior to servicing.
Diamond Series™
Section 2 Installation
2.2.2
Weights
Weights are listed below each cabinet on the Transmitter Outline drawing. Be sure to
include this information in your planning for the building and verify that the structure is
capable of safely supporting the total weight of the transmitter and its peripheral
equipment.
2.2.3
RF System Layout
Refer to the RF Layout drawing for the transmitter and RF system floor plan. A system
of overhead supports and hangers is needed to support the coaxial lines, filters, and
other RF components. The support system should be installed so that the RF
components are completely supported by the hangers, to minimize the weight carried by
the output connectors at the top of the cabinets.
An overhead grid of unistrut or angle iron and 3/8" threaded rod is most commonly
used. Pipe hangers may be used to hold the coax, combiners, etc. Pay special attention
to the different types of materials being used. For example, if galvanized parts are used
to support copper RF transmission line, the two must be separated using adhesive-
backed rubber strips or tape to prevent corrosion.
The basic transmitter generally includes harmonic filters and directional couplers. One
or more combiners are present in multiple-cabinet systems. All other RF line
components are purchased separately. Be sure to obtain all components necessary for
your installation.
2.2.4
Air System
The Transmitter Outline drawing shows a typical exhaust duct and blower system, and
the total transmitter requirement for cooling air. The minimum ceiling height to
properly handle exhaust air as shown is 12 feet. The outline drawing also shows a
typical air intake and prefilter system.
NOTE:
There is a recessed cable tray in the top of each PA Cabinet that is used for cabi-
net interconnect wiring. It is concealed by a flat metal cover. Be sure to locate
this cover before mounting any ducting or building walls which may restrict
access. This is also where the interconnect cables are stored for shipping.
The intake blower should be sized to provide slight positive room pressure. A
manometer installed to sense pressure drop across the filters can be used to indicate
when prefilter replacement is due.
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