User Manual
Table Of Contents
- AMENDMENT LIST RECORD SHEET
- INTRODUCTION
- 1.SAFETY CONSIDERATIONS
- 2.OVERVIEW/SYSTEM DESCRIPTION
- 3.SPECIFICATION
- 4.SYSTEM DRAWINGS
- 5.SUB-UNIT MODULES
- 5.1VTA Downlink Duplexer Shelf 60-025302 (4U chassis)
- 5.2VTA Downlink Amplifier Shelf (50-025303, 8U Chassis)
- 5.2.1UHF 3dB Splitter (05-002603)
- 5.2.2¼Watt 0- -30dB Switched Attenuator \(10-00
- 5.2.3Low Noise Amplifier (11-006102)
- 5.2.4Low Noise Amplifiers (11-007302 & 11-007402)
- 5.2.4.1Description
- 5.2.4.2Technical Specification, (11-007302)
- 5.2.4.3Technical Specification (11-007402)
- 5.2.4.4Drg. No. 11-007302, LNA Assembly With Alarm Relay
- 5.2.4.5Drg. No. 11-007370, LNA RF Circuit Diagram
- 5.2.4.6Drg. No. 11-007371, LNA DC Wiring Diagram
- 5.2.5.7Drg. No. 11-003971, LNA DC Circuit Diagram
- 5.2.63 Stage Amplifier Alarm Boards (12-002201)
- 5.2.7450MHz 20W Power Amplifier (12-004201)
- 5.2.8Single DC/DC Converter (13-001702)
- 5.2.924V Single Relay Board (80-008902)
- 5.2.1024V 410W Power Supply (96-300054)
- 5.3VTA Downlink Channel Shelf (50-025304)
- 5.4VTA Uplink Duplexer Shelf (50-025305, 4U Chassis)
- 5.5VTA Uplink Amplifier Shelf (50-025306, 8U Chassis)
- 5.5.120Watt Class A Power Amplifier (12-016301)
- 5.5.2Automatic Gain Control (17-001101, Det. & 17-001201, Atten.)
- 5.5.2.1Description
- 5.5.2.2Technical Specification
- 5.5.2.3Drg. No. 17-001101, ACG Detector Assembly
- 5.5.2.4Drg. No. 17-001171, AGC Detector Circuit Diagram
- 5.5.2.5Drg. No. 17-001171C, AGC Detector Parts List
- 5.5.2.6Drg. No. 17-001201, AGC Attenuator Assembly Drawing
- 5.5.2.7Drg. No. 17-001270, AGC Attenuator Circuit Diagram
- 5.5.2.8Drg. No. 17-001270C, AGC Attenuator Parts List
- 6.INSTALLATION
- 7.MAINTENANCE
- APPENDIX AINITIAL EQUIPMENT SET-UP CALCULATIONS
9 Way Channelised UHF Cell Enhancer
Maintenance Handbook
H/book Number:-50-025301HBKM
Issue No:-
1
Date:-04/07/2003
Page:-
37 of 69
5.2.7.4 Drg. N. 12-004270, PA Circuit Diagram
1A
12-004270
POWER AMPLIFIER 450MHz 10/20W CLASS A
CIRCUIT DIAGRAM
-
3/8/98DBS
BYDATEDESCRIPT IO NNo
ISSUE
123456789
A
B
C
D
E
F
123456789
A
B
C
D
E
F
PRODUCTION ISSUE
PDC
3/8/98
+
RF INPUT
+
+
+
+
RF OUTPUT
+24v
ALARM
REF
ALARM
DET.1
ALARM
DET.2
R1
1R2
1KR
R2
R3
470R
REG .1
ADJ
OUT
IN
ADJ
REG .2
OUT
IN
C3
1uF
1nF
C7
1uF
C9
220pF
C8
L1 L3 L4 L5
FB4FB3FB2FB1
L2
47pF
C5
47pF
C6
1-14pF
C4
1-14pF
C2
C1 0
1-14pF
C1 1
1-14pF
TR1
TP5012
PTB20 0 31
TR2
C1 3
1-14pF
C1 5
1-14pF 1-14pF
C2 5 C26
1-14pF
C2 2
1-14pF
18pF
C2 8
27pF
C1 6
C1 7
27pF
C2 9
18pF
56pF
C1 2
4.7uF
C1 4
R5
R4 7
C1 9
56pF 1uF
C1 8
C2 0
1uF 56pF
C2 1
1000pF
C3 0
1KR
R4
1uH
D1
2OCTQ45
C2 4
15pF
C2 3
15pF
56pF
C2 7
C1
56pF
LM337T LM337T
CONDUCTORS SHOWN THUS: ARE 50 ohm STRIPLINES
REFER TO 12-004211 FOR COMPONENT POSITIONS EXCEPT FOR THOSE MARKED
(THEY ARE SPECIFIED ON 12-004201)
*
*
*
*
*
*
*
*
CR1679
16/5/00
DBS1B
Fax (01494)777002
Tel: (01494) 777000
Aerial Facilities Limited
THIS IS A PROPRIETARY DESIGN O F AERIAL FACILITIES LTD.
REPRODUCTION OR USE OF THIS DESIGN BY OTHERS IS
PERMISSIBLE O NLY IF EXPRESSLY AUTHORISED IN WRITING
BY AERIAL FACILITIES LTD.
NO DECIMAL P L ACE ± 1 mm
ONE DECIMAL PL ACE ± 0.3mm
TWO DECIMAL PLACES ± 0.1mm
AL L DIMENSIO NS ARE IN mm
UNLESS OTHERWISE STATED
CHKD
DRAWN
APPD
DATE
TO LERANCES
SCALE
England
CUSTOMER DRAWING.No
TITLE
3
A
C3 1
1nF
*
GB BB