Daniels VT-3/140-SWA2, Instruction Manual

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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................................................1-5
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.........................................................................3-7