Codan Radio Communications UT-3-460-S08 User Manual
DE
DANIELS
ELECTRONICS
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
iii
TABLE OF CONTENTS
Page
1
GENERAL.................................................................................................................... 1-1
1.1
1.1
Introduction....................................................................................................... 1-1
1.2
Performance Specification................................................................................. 1-1
2
THEORY OF OPERATION ........................................................................................ 2-1
2.1
2.1
Amplifier Operation .......................................................................................... 2-1
2.2
Power Requirements ......................................................................................... 2-2
2.3
RF Circuitry...................................................................................................... 2-2
2.3.1
UT-3/400 Lowpass Filter...................................................................... 2-2
2.4
Power Control Circuitry.................................................................................... 2-3
2.5
Power Sensing Circuitry ................................................................................... 2-3
2.5.1
Output Power Sense.............................................................................. 2-3
2.5.2
VSWR Sense........................................................................................ 2-4
2.5.3
VSWR Overload................................................................................... 2-4
3
UT-3/400 AMPLIFIER ALIGNMENT........................................................................ 3-1
3.1
3.1
General.............................................................................................................. 3-1
3.2
Repair Note....................................................................................................... 3-1
3.3
Recommended Test Equipment List.................................................................. 3-1
3.4
Printed Circuitboard Numbering Convention.................................................... 3-2
3.5
Standard Factory Settings and Jumper Configuration....................................... 3-2
3.6
UT-3/400 Amplifier Alignment......................................................................... 3-2
3.6.1
General.................................................................................................. 3-2
3.6.2
UT-3/400 Amplifier Adjustment ........................................................... 3-3
3.6.2.1
General Set-Up ......................................................................... 3-3
3.6.2.2
Output Power Alarm (Forward Power) ..................................... 3-4
3.6.2.3
Output Power............................................................................ 3-5
3.6.2.4
Antenna VSWR Alarm (Reverse Power)................................... 3-5
3.6.2.5
Antenna VSWR Overload......................................................... 3-6
3.6.2.6
Procedure Verification............................................................... 3-6
4
ILLUSTRATIONS AND SCHEMATIC DIAGRAMS............................................... 4-1
4.1
4.1
UT-3/400 UHF Amplifier Component Layout.................................................. 4-2
4.2
UT-3/400 UHF Amplifier Schematic Diagram ................................................. 4-3
4.3
UT-3/400 UHF Lowpass Filter Component Layout ......................................... 4-5
4.4
UT-3/400 UHF Lowpass Filter Schematic Diagram......................................... 4-5