Lectrosonics MM400b - Manual (Page 5)

Watertight Miniature UHF Belt-Pack Transmitter
Table of Contents
General Technical Description .............................................................................................................................................................. 6
General ................................................................................................................................................................................................. 6
Digital Hybrid Wireless™ Technology* ................................................................................................................................................. 6
Low Frequency Roll-Off ........................................................................................................................................................................ 6
Input Limiter .......................................................................................................................................................................................... 7
Digital Signal Processor ....................................................................................................................................................................... 7
Microprocessor, PLL and VCO Circuits ................................................................................................................................................ 7
Compatibility Modes ............................................................................................................................................................................. 7
Pilot Tone Squelch ................................................................................................................................................................................ 7
Wide-Band Deviation ............................................................................................................................................................................ 7
Magnetic Power ON/OFF Switch .......................................................................................................................................................... 7
Battery Life ........................................................................................................................................................................................... 7
Frequency Agility .................................................................................................................................................................................. 7
Circulator/Isolator ................................................................................................................................................................................. 7
Controls and Functions ......................................................................................................................................................................... 8
Preventing Internal Corrosion ............................................................................................................................................................... 8
Power ON/OFF Switch ......................................................................................................................................................................... 8
Power LED ............................................................................................................................................................................................ 8
Mic Jack ................................................................................................................................................................................................ 9
Audio Level ........................................................................................................................................................................................... 9
Modulation LEDs .................................................................................................................................................................................. 9
Frequency Select Switches .................................................................................................................................................................. 9
Antenna ................................................................................................................................................................................................ 9
The Belt Clip ....................................................................................................................................................................................... 10
Battery Installation .............................................................................................................................................................................. 10
Operating Instructions ........................................................................................................................................................................ 11
Selecting the Compatibility Mode ....................................................................................................................................................... 11
Adjusting Transmitter Frequency ........................................................................................................................................................ 11
Attaching a Microphone and Adjusting Audio Levels ......................................................................................................................... 12
Power Switch Function Selection ....................................................................................................................................................... 13
Determine Power Switch Function Mode ........................................................................................................................................ 13
Changing Power Switch Function ................................................................................................................................................... 13
Replacing the Power Switch Magnet Housing Assembly ................................................................................................................ 14
Microphone RF Bypassing .................................................................................................................................................................. 15
Replacement Parts and Accessories ................................................................................................................................................. 16
UHF Transmitter Antenna Specifications ............................................................................................................................................ 16
Troubleshooting ................................................................................................................................................................................... 17
Specifications and Features ............................................................................................................................................................... 18
Service and Repair ............................................................................................................................................................................... 19
Returning Units for Repair .................................................................................................................................................................. 19
Rio Rancho, NM 5