Instruction Manual

DE
DANIELS
ELECTRONICS
Enhanced AM/FM Synthesizer Instruction Manual OS(R/T)-3(A/H) 29 - 470 MHz iii
TABLE OF CONTENTS
Page
1 GENERAL..........................................................................................1-1
1.1 Introduction...................................................................................1-1
1.2 OS(R/T)-3(A/H) Enhanced Synthesizer Family Models ................................1-1
1.3 Performance Specifications .................................................................1-3
1.4 Printed Circuit Board Numbering Convention ...........................................1-4
2 THEORY OF OPERATION......................................................................2-1
2.1 Internal Power and Control (Digital Board)...............................................2-1
2.2 Synthesizer Analog Circuitry (Analog Board)............................................2-1
2.2.1 Common Analog Board Circuitry.......................................................2-1
2.2.2 29 - 71.4 MHz Analog Board Circuitry ................................................2-3
2.2.3 118 - 159.4 MHz Multichannel AM Analog Board Circuitry........................2-3
2.2.4 128 - 174 MHz Analog Board Circuitry................................................2-4
2.2.5 406 - 470 MHz Analog Board Circuitry................................................2-5
2.3 Synthesizer Digital Circuitry (Digital Board) .............................................2-6
2.4 Frequency Control ...........................................................................2-6
2.4.1 BCD Switch Frequency Control ........................................................2-6
2.4.2 Frequency Select Handle Frequency Control..........................................2-7
2.5 Synthesizer Base and Frequency Increment Table .......................................2-7
2.6 5.0/6.25 kHz Channelization. ..............................................................2-8
2.7 8.333 kHz Channelization. .................................................................2-8
2.8 12.5 kHz Channelization....................................................................2-9
3 SYNTHESIZER ALIGNMENT .................................................................3-1
3.1 General ........................................................................................3-1
3.2 Repair Note ...................................................................................3-1
3.3 Recommended Test Equipment.............................................................3-1
3.4 OS(R/T)-3(A/H) Synthesizer Factory Configuration ....................................3-1
3.5 OS(R/T)-3(A/H) Synthesizer Alignment ..................................................3-2
3.5.1 General .....................................................................................3-2
3.5.2 Synthesizer Test Points...................................................................3-2
3.5.3 Synthesizer Removal and Installation...................................................3-3
3.5.4 Circuit Board Removal ...................................................................3-3
3.5.5 Frequency Adjustment and Channel Selection.........................................3-3
3.5.5.1 VHF OS(R/T)-3H 29 - 71.4 MHz VCO Alignment ...............................3-4
3.5.5.2 VHF OS(R/T)-3A 118 - 159.4 MHz Alignment ...................................3-5
3.5.5.3 VHF OS(R/T)-3H 128 - 174 MHz VCO Alignment...............................3-5
3.5.5.4 UHF OS(R/T)-3H 406 - 470 MHz VCO Alignment...............................3-6
3.5.5.5 Reference Frequency Alignment .....................................................3-6
3.5.6 Jumper Configuration ....................................................................3-6