Parts List

iv Transmitter Main Board Instruction Manual
2.4.1 General...............................................................................................2-12
2.4.2 Power Requirements ...........................................................................2-12
2.4.3 Audio Processor Turn-on Time ..........................................................2-13
2.4.4 Audio Processor Signals.....................................................................2-13
2.4.4.1 Audio Processor Outputs........................................................2-13
2.4.4.2 Audio Processor Modulation Output......................................2-14
2.4.4.3 Audio Processor Low Frequency / Direct Mod. Output.........2-14
2.4.4.4 Audio Processor Inputs ..........................................................2-14
2.4.4.5 Audio Processor Microphone Input........................................2-15
2.4.4.6 Audio Processor Balanced Input.............................................2-15
2.4.4.7 Audio Processor Auxiliary Input ............................................2-15
2.4.4.8 Audio Processor Subtone Inputs ............................................2-15
2.4.4.9 Audio Processor Direct Modulation Input..............................2-16
2.5 Low Frequency Modulation ............................................................................2-16
3 TRANSMITTER ALIGNMENT .................................................................................3-1
3.1 General...........................................................................................................3-1
3.2 Repair Note.....................................................................................................3-1
3.3 Printed Circuitboard Numbering Convention ..................................................3-1
3.4 Recommended Test Equipment List................................................................3-1
3.5 Standard Factory Settings and Jumper Configuration .....................................3-2
3.5.1 MT-3 Transmitter Board Factory Configuration .................................3-2
3.5.2 MT-3 Audio Processor Factory Configuration ...................................3-3
3.6 MT-3 Transmitter Board Alignment ...............................................................3-4
3.6.1 General...............................................................................................3-4
3.6.2 MT-3 Transmitter Board Test Points..................................................3-5
3.7 Module Installation and Removal ....................................................................3-5
3.8 MT-3 Audio Processor Alignment ..................................................................3-6
3.8.1 General...............................................................................................3-6
3.8.2 MT-3 Audio Processor Standard Deviation Adjustment .....................3-6
3.9 Standard Factory Settings and Jumper Configuration .....................................3-8
3.9.1 MT-3 Audio Processor Factory Configuration (Version 1.8).............3-8
3.10 MT-3 Audio Processor Alignment (Version 1.8)............................................3-10
3.10.1 General...............................................................................................3-10
3.10.2 MT-3 Audio Processor Standard Deviation Adjustment .....................3-10
3.11 Low Frequency Modulation Configuration .....................................................3-11
3.11.1 MT-3 Transmitters ..............................................................................3-11
3.11.2 MT-3 Tr ansmitter Audio Processors ..................................................3-12
3.11.3 Synthesizer and Crystal Controlled Oscillator ....................................3-13
3.11.4 Tuning the Transmitter ........................................................................3-14
4 TRANSMITTER INTERCONNECT PIN DEFINITIONS ........................................4-1
5 ILLUSTRATIONS AND SCHEMATIC DIAGRAMS..............................................5-1
5.1 Transmitter Block Diagram.............................................................................5-1
5.2 Tra nsmitter Main Board Electrical Assembly..................................................5-3