Installation Instructions

835A 4 kW, 5 kW or 6 kW UHF Transmitter, Internally Diplexed Unpacking and Installation
- Page 2 of 2 - November 7, 2002
Main AC Inputs
Once the Cabinets are in place and the Trays are checked for damage and alignment, the Main AC Hook-Up is ready to be
made. Before connecting the 208/240 VAC, make certain that all of the circuit breakers associated with the Transmitter are
switched Off. There are three AC Input circuits to the Transmitter, one 208/240 VAC 20 Amp for the Exciter Cabinet and two
208/240 VAC 100 Amp for single phase or two 208/240 VAC 55 Amp for three phase, one to each of the Amplifier Cabinets.
The 20 Amp, 208/240 VAC Input connections are made to the Terminal Block A8-TB1, which is part of the AC Distribution
Assembly, Exciter Cabinet (1245-1500), located near the center right hand side, rear portion of Cabinet #1. Terminal 1 Line 1,
Terminal 3 Line 2 (208/240 VAC) and Terminal 2 (Chassis Ground).
Three Phase AC Installation to the Amplifier Cabinets
Connect one of the 55 Amp, 208/240 VAC Inputs to the Terminal Block A10-TB1, which is part of the AC Distribution
Assembly, Amplifier Assembly (1278-1100), located near the center right hand side, rear portion of Cabinet #2. Connect Line
1 to TB1-1A, Line 2 to TB1-2A, Line 3 to TB1-3A, and Safety Ground to TB1-4A.
Connect the other 55 Amp, 208/240 VAC Input to the Terminal Block A10-TB1, which is part of the AC Distribution
Assembly, Amplifier Assembly (1278-1100), located near the center right hand side, rear portion of Cabinet #3. Connect Line
1 to TB1-1A, Line 2 to TB1-2A, Line 3 to TB1-3A, and Safety Ground to TB1-4A.
Single Phase AC Installation to the Amplifier Cabinets
Connect one of the 100 Amp, 208/240 VAC Inputs to the Terminal Block A10-TB1, which is part of the AC Distribution
Assembly, Amplifier Assembly (1278-1200), located near the center right hand side, rear portion of Cabinet #2. Connect Line
1 to TB1-1A, Line 2 to TB1-3A and Safety Ground to TB1-4A.
Connect the other 100 Amp, 208/240 VAC Input to the Terminal Block A10-TB1, which is part of the AC Distribution
Assembly, Amplifier Assembly (1278-1200), located near the center right hand side, rear portion of Cabinet #3. Connect Line
1 to TB1-1A, Line 2 to TB1-3A and Safety Ground to TB1-4A.
Output Connections
The RF Output of the (A2) Amplifier Assembly connects through (A5) a 1-5/8" to 3-1/8" Adaptor to J1 on (A4) the Hybrid
Combiner and the RF Output of the (A3) Amplifier Assembly connects through (A6) a 1-5/8" to 3-1/8" Adaptor to J2 on (A4)
the Hybrid Combiner. The Reject Output of the combiner at J4 connects through (A12) a 1-5/8” to 3-1/8” Adapter to (A7) a
Directional Coupler (1016-1043) to (A8) a 2500 Watt Reject Load. The combined RF Output of the Combiner at J3 connects
to through (A9) Bandpass Filter to (A10) the Output Trap Filter Assembly. The filtered output connects through (A11) the
Output Coupler Assembly (1020-1002) to the Transmission Line that is connects to your Antenna System.
This completes the Unpacking and Installation of the 835A UHF Transmitter, Internally Diplexed. Refer to the Set Up and
Operation Procedure which follows before applying power to the Transmitter.