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

UBS-Axcera 5000-Watt UHF Translator 315941

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Chapter 5

4-6 kW UHF Translator Chapter 5, Detailed Alignment Procedures 837B, Rev. 0 5-1 Chapter 5 Detailed Alignment Procedures The 837B translator was aligned at the factory and should not require any additional alignments to achieve normal operation. This translator takes the On channel RF input to the Receiver Tray and converts it to the desired UHF On Channel RF Output at the systems output power level. If the (Optional) Modulator Kit is purchased, this translator can also operate using the baseband audio and video inputs or, if the (Optional) 4.5-MHz composite input kit is purchased, either a single composite video + 4.5-MHz input or separate baseband video and audio inputs. Make sure that the RF output at J2 of the (A11) coupler is terminated into a dummy load of 4000 to 6000 watts, depending on your systems output power. While performing the alignment, refer to the test data sheet for the translator and compare the final readings from the factory with the readings on each of the trays. They should be very similar. If a reading is off by a significant amount, the problem is likely to be in that tray. Switch on the main AC and the UHF exciter circuit breakers on the AC distribution panel behind the rear cabinet door of the Exciter Cabinet. 5.0 UHF/VHF Receiver Tray.)(1142479 or 1265-1100; Appendix C) Connect a UHF or VHF Input that is at the desired Channel Frequency, to J1 50Ω or J5 75Ω located on the rear of the (A7) VHF/UHF Receiver Tray. Check that the On/Off Switch located on the rear of the Tray is On. Note: If the Red LED, DS1 is lit, +12 VDC is present at the input of the Receiver Tray and may damage any test equipment connected to it. Remove the fuse F1, DS1 will not be lit, before connecting test equipment to the input jack of the Receiver Tray. 5.0.1 (A7) UHF Filter, DC Multiplexed {(1035-1204, 50Ω or 1035-1207, 75Ω), VHF Filter, LB, DC Multiplexed (1035-1902, 50Ω or 1035-1903, 75Ω) or VHF Filter, HB, DC Multiplexed (2065-1024, 50Ω or 2065-1023, 75Ω); Appendix D)} The input UHF or VHF signal (-61 dBm to -16 dBm) is fed to the filter which has been factory swept for 6 MHz Bandwidth at the Channel frequency and should not be tuned in the field. The output of the filter is directed to the J1 input of (A8) the Dual Stage Amplifier Assembly. 5.0.2 (A8-A1) Dual Stage Amplifier Board (1227-1501; Appendix D) Mounted in: (A8) a Dual Stage Amplifier Assembly (1227-1503). The Dual Stage Amplifier Board has been factory set to the channel frequency and contains no customer tuning adjustments. The board has approximately +13 dB or +26 dB of gain, depending on whether Jumper W1 on J5 is in place. 5.0.3 (A9) UHF Filter {(1007-1101), VHF LB Filter (1034-1202) or VHF HB Filter (2065-1000); Appendix D} The UHF or VHF Filter has been factory swept for 6 MHz Bandwidth at the Channel Frequency and should not be tuned in the field. The output of the filter (-50 dBm to -5 dBm) is fed either through the additional amplifier stage on the Variable Gain Amplifier Board or to
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Document ID315947
Application IDIvxsTSeCk+NqVRhS+T638w==
Document DescriptionChapter 5
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeUser Manual
Display FormatMicrosoft Word - pdf
Filesize15.73kB (196586 bits)
Date Submitted2003-04-04 00:00:00
Date Available2003-06-17 00:00:00
Creation Date2003-04-04 13:04:50
Producing SoftwareAcrobat Distiller 5.0.5 (Windows)
Document Lastmod2003-04-04 13:04:50
Document TitleMicrosoft Word - 315947.DOC
Document CreatorPScript5.dll Version 5.2
Document Author: fcc
FCC ID Filing: OUS837B-5

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