UBS Axcera 837B-5 5000-Watt UHF Translator User Manual

UBS-Axcera 5000-Watt UHF Translator 315941

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Chapter 2

4-6 kW UHF Translator Chapter 2, System Description 837B, Rev. 0 2-1 Chapter 2 System Description The 837B is a complete 4-6 kW UHF Solid State Internally Diplexed Television Translator which operates at a nominal Visual Output Power of 4000 - 6000 Watts Peak of Sync and Average Aural Output Power of 400 - 600 Watts, at an A/V Ratio of 10 dB, 10 % Sound or 200 - 300 Watts at 13 dB, 5 % Sound. The 837B is made up of three Cabinets, a UHF Single Exciter Cabinet and two Amplifier Array Cabinets. 2.1 System Overview The standard 837B is functionally comprised of (A1) a Single UHF Exciter Assembly, (A2 & A3) two 2-3 kW Amplifier Array Assemblies, (A4) a Hybrid Combiner Assembly and (A11) an Output Coupler Assembly. A sample is taken from the Hybrid Combiner and connected to (A7) a Directional Coupler. 2.1.1 (A1) UHF Exciter Assembly (1278-1400; Appendix C) The (A1) UHF Exciter Assembly is made up of the trays and assemblies listed in Table 2-1. Table 2-1. UHF Exciter Assembly Trays and Assemblies MAJOR ASSEMBLY DESIGNATOR TRAY/ASSEMBLY NAME PART NUMBER A1 UHF Exciter, M/N 1142458 A3 2-way splitter assembly ZSFC-2-2SMA A4 Phase/Gain Tray 1245-1200 A5 Phase/Gain Tray 1245-1200 A6 Metering Panel 1136811 A7 UHF receiver tray 1265-1100 A8 AC Distribution Assembly 1245-1500 A9 Remote Interface Assembly 1245-1801 The UHF Exciter Tray operates using either the IF Output from the (A7) UHF Receiver Tray connected to J1 on the ALC Board (1265-1305) or the Combined IF Output generated from the (Optional) Baseband Audio and Video Inputs connected to J32 on the ALC Board. The two IF Outputs are connected to the IF Relays K3 and K4, located on the ALC Board and by applying or removing a Jumper on Jack J8 Pins 10 & 11 located on (A9) the Remote Interface Assembly (1245-1801) the IF Output is selected. To select the output from the Modulator, J8-10 and 11, must be connected together. To select the output from the Receiver Tray, J8-10 and 11, must not be connected together. The UHF Receiver Tray (1265-1100) takes the received RF On Channel Frequency and generates a 45.75 MHz + 41.25 MHz Combined IF Output. The Combined IF Output of the Receiver Tray connects to J6 on the rear of the (A1) UHF Exciter that is wired to J1 on the ALC Board. With Receiver selected, no connection between J8-10 and 11 on the Remote Interface Assembly, the IF Output from the Receiver Tray connects through the Relays to the rest of the ALC Board. The (Optional) Baseband Audio, from TB1 or J3, and Video, from J1, connect to the UHF Exciter which produces a Combined IF Output that connects to J32 on the ALC Board.
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Document ID315944
Application IDIvxsTSeCk+NqVRhS+T638w==
Document DescriptionChapter 2
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeUser Manual
Display FormatMicrosoft Word - pdf
Filesize12.29kB (153615 bits)
Date Submitted2003-04-04 00:00:00
Date Available2003-06-17 00:00:00
Creation Date2003-04-04 13:03:05
Producing SoftwareAcrobat Distiller 5.0.5 (Windows)
Document Lastmod2003-04-04 13:03:05
Document TitleMicrosoft Word - 315944.DOC
Document CreatorPScript5.dll Version 5.2
Document Author: fcc
FCC ID Filing: OUS837B-5

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