Lectrosonics MM400c User Manual
Page 5
Watertight Miniature UHF Belt-Pack Transmitter
Rio Rancho, NM
5
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
Belt Clip .................................................................................................................................................................................................9
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