User Manual

9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-
1
Date:-04/07/2003
Page:-
3 of 69
5.2.6.2 Technical Specification ....................................................................................................................30
5.2.6.3 Drg. Nō. 12-002201, 3 Stage Alarm Board Assembly Drawing & Parts List..................................31
5.2.6.4 Drg. Nō. 12-002270, 3 Stage Alarm Board Circuit Diagram..........................................................32
5.2.6.5 Generic Rack Shelf Enclosure Alarm Wiring Sketch .......................................................................33
5.2.7 450MHz 20W Power Amplifier (12-004201)..........................................................................................35
5.2.7.1 Description.......................................................................................................................................35
5.2.7.2 Technical Specification ....................................................................................................................35
5.2.7.3 Drg. Nō. 12-004201, PA General Assembly ....................................................................................36
5.2.7.4 Drg. Nō. 12-004270, PA Circuit Diagram.......................................................................................37
5.2.7.5 Drg. Nō. 12-004270C1, PA Parts List(1).........................................................................................38
5.2.7.6 Drg. Nō. 12-004270C2, PA Parts List(2).........................................................................................39
5.2.7.7 Drg. Nō. 12-003670, PA to Alarm Wiring Details...........................................................................40
5.2.8 Single DC/DC Converter (13-001702) ....................................................................................................41
5.2.8.1 Description.......................................................................................................................................41
5.2.8.2 Technical Specification ....................................................................................................................41
5.2.8.3 Drg. Nō. 13-001702, 12.8V Regulator Assembly Drawing & Parts List .........................................42
5.2.8.4 Drg. Nō. 13-001771, 12.8V Single Regulator Circuit Diagram ......................................................43
5.2.9 24V Single Relay Board (80-008902)......................................................................................................44
5.2.9.1 Description.......................................................................................................................................44
5.2.9.2 Drg. Nō. 80-008970, Single Relay Board Circuit Diagram.............................................................45
5.2.10 24V 410W Power Supply (96-300054)................................................................................................46
5.2.10.1 Description...................................................................................................................................46
5.2.10.2 Technical Specification ................................................................................................................46
5.3 VTA Downlink Channel Shelf (50-025304)..............................................................................................47
5.3.1 UHF 3dB Splitter (05-002603) See section 5.2.1 ....................................................................................47
5.3.2 4-Way Splitter (05-003401) .....................................................................................................................47
5.3.2.1 Description.......................................................................................................................................47
5.3.2.2 Technical Specification ....................................................................................................................47
5.3.3 Channel Control Module (17-002101).....................................................................................................48
5.3.3.1 Description.......................................................................................................................................48
5.3.3.2 Technical Specification ....................................................................................................................48
5.3.3.3 VHF/ UHF Programming Procedure ..............................................................................................49
5.3.3.4 VHF/ UHF Programming Example .................................................................................................50
5.3.4 Channel Selectivity Module (17-010601) ................................................................................................51
5.3.4.1 Description.......................................................................................................................................51
5.3.4.2 Drg. Nō. 17-003080, Generic Channel Module Block Diagram .....................................................52
5.4 VTA Uplink Duplexer Shelf (50-025305, 4U Chassis) ............................................................................53
5.4.1 Bandpass Filters (02-011204 & 02-013401) See section 5.1.1................................................................53
5.5 VTA Uplink Amplifier Shelf (50-025306, 8U Chassis)............................................................................53
5.5.1 20Watt Class A Power Amplifier (12-016301)........................................................................................53
5.5.1.1 Description.......................................................................................................................................53
5.5.1.2 Technical Specification ....................................................................................................................53
5.5.1.3 Drg. Nō. 12-016370, 20W PA Circuit Diagram ..............................................................................54
5.5.2 Automatic Gain Control (17-001101, Det. & 17-001201, Atten.)...........................................................55
5.5.2.1 Description.......................................................................................................................................55
5.5.2.2 Technical Specification ....................................................................................................................56
5.5.2.3 Drg. Nō. 17-001101, ACG Detector Assembly ................................................................................57
5.5.2.4 Drg. Nō. 17-001171, AGC Detector Circuit Diagram.....................................................................58
5.5.2.5 Drg. Nō. 17-001171C, AGC Detector Parts List .............................................................................59
5.5.2.6 Drg. Nō. 17-001201, AGC Attenuator Assembly Drawing ..............................................................60
5.5.2.7 Drg. Nō. 17-001270, AGC Attenuator Circuit Diagram..................................................................61
5.5.2.8 Drg. Nō. 17-001270C, AGC Attenuator Parts List ..........................................................................62
6. INSTALLATION............................................................................................................................ 63
6.1 Initial Installation Record .........................................................................................................................63
7. MAINTENANCE............................................................................................................................ 64
7.1 General Procedures....................................................................................................................................64
7.1.1 Basic Fault Finding ..................................................................................................................................64