Assembly Instructions Chapter 3

3-kW UHF Transmitter Chapter 3, Installation and Setup Procedures
835-3, Rev. 0 3-4
and may need to be modified for unusually severe conditions. A combination of air
conditioning and ventilation should not be difficult to design. System interlocking and
thermostat settings should be reviewed with ADC. As with any equipment installation, it
is always good practice to consult the manufacturer when questions arise. ADC can be
contacted at [phone].
3.2 Unpacking the Cabinets and Trays
Note: Air conditioning and any related heat-exhaust ducts should be in place
before continuing with the installation of the transmitter.
Thoroughly inspect the cabinets and all other materials upon their arrival. ADC certifies
that upon leaving our facility the equipment was undamaged and in proper working
order. The shipping containers should be inspected for obvious damage that indicates
rough handling. Check for dents and scratches or broken switches, meters, or
connectors. Any claims against in-transit damage should be directed to the carrier.
Inform ADC as to the extent of any damage as soon as possible.
Remove the two cabinets, bandpass filter, trap filter, directional coupler, and installation
material that make up the 835-3 from the crates and boxes. Remove the straps that
hold the cabinets to the shipping skid and slide the cabinets from the skid. Remove the
plastic wrap and foam protection from around the cabinets. Do not remove any labeling
or tags from any cables or connectors; these are identification markers that make
assembly of the transmitter much easier.
Refer to the racking plan drawing (1595-7251) for the proper position of the cabinets.
Position the exciter assembly with the 1-kW transmitter cabinet to the left of the 3-kW
amplifier cabinet. The air intake to the transmitter is intended for room air only. The
cabinets should be positioned with consideration given for adequate air intake and
exhaust; the opening of the rear doors; access to the trays, including sliding them out
for testing; the main AC hook-up; and the installation of the output transmission line.
After positioning, the cabinets should be permanently mounted to the floor of the site
through the holes in the bottom of the cabinets. The cabinets also should be grounded
using copper strapping material.
The trays are mounted in the cabinet using Chassis Trak cabinet slides. The tray slides
are on the top and bottom of the 600-watt amplifier trays and on the sides of the UHF
exciter trays. Inspect the trays for any loose hardware or connectors, tightening where
needed. Open the rear door; if a lock is present, the key to unlock the door is found in a
tan envelope taped to the door. Inspect the interior of the cabinet for packing material
and carefully remove any packing material that is found.
3.3 Installing the Cabinets and Trays
The AC distribution panel from the 2-kW transmitter mounts into the left cabinet (see
drawing 1595-7251). Position the exciter for the 1-kW transmitter to the right of the AC
distribution panel even with the top. The two 600-watt amplifier trays for the 1-kW
transmitter mount at the bottom of the cabinet. The UHF exciter for the 3-kW
transmitter mounts at the top of the cabinet.
Refer to the interconnect drawing (1176-8528) for point-to-point connections while
doing the following procedure. Slide the six 600-watt amplifier trays into the amplifier
cabinet on the right. Slowly slide each tray in and out to verify that they do not rub
against each other and have no restriction to free movement. In the installation
material that has been provided with the transmitter, locate six equal length RG-55