Related Manuals for Lectrosonics MM400B
Summary of Contents for Lectrosonics MM400B
- Page 1 INSTRUCTION MANUAL MM400B Watertight Miniature UHF Belt-Pack Transmitter ™ Featuring Digital Hybrid Wireless Technology Fill in for your records: Serial Number: Purchase Date: Rio Rancho, NM, USA www.lectrosonics.com...
- Page 2 MM400B LECTROSONICS, INC.
- Page 3 50 Ohm SMA port on the transmitter. • Ultra-lightweight, corrosion resistant housing The MM400B is machined from a solid aluminum block • Watertight seals for use in wet environments to provide the lightweight, rugged package needed in •...
- Page 4 MM400B LECTROSONICS, INC.
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Page 5: Table Of Contents
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 ..................................... -
Page 6: General Technical Description
The Lectrosonics Digital Hybrid Wireless™ system excessive power amplifier drain or even damage to overcomes channel noise in a dramatically new way, loudspeaker systems. -
Page 7: Input Limiter
A magnetic power switch is used to control the applica sients, so that its action is hidden from the listener, but tion of power to the MM400B circuits and as an audio recovers slowly from sustained high levels, to both keep mute switch. -
Page 8: Controls And Functions
Unit Audio Mute Turns On Audio Mutes Audio Mode If the MM400B Power ON/OFF Switch has been Audio Level Control configured for Audio Mute Mode, it is still possible to Microphone Jack turn off the transmitter without removing the battery. -
Page 9: Mic Jack
M152-WP (waterproof) is specifically designed for Compatiblity Modes and for configuring the Power ON/ the MM400B, other two-wire lavaliere microphones can OFF switch. be adapted to the MM440B using the WPMC-3 or The switches are accessed by loosening the retaining WPMC-10 kits. -
Page 10: The Belt Clip
NiMH batteries. It is possible to track battery status using the Battery Timer function available in a number of Lectrosonics receivers. (Refer to your receiver manual to determine if this function is available.) Alkaline batteries provide about 1.75 hours of operation with some warning. -
Page 11: Operating Instructions
• 100 Series mode: All Digital Hybrid receivers are capable of working with • 200 Series mode: Lectrosonics MM400B transmitter, and by setting the • Mode 3: proper Compatibility Mode, the unit will also work with • 400 Series mode: 200 Series and 100 Series analog receivers, plus some •... -
Page 12: Attaching A Microphone And Adjusting Audio Levels
Frequency Select Switch settings loudest voice. indicated in the receiver’s display. 7) Once the MM400B’s audio gain has been set, the If you are using a 100 Series receiver, turn off the remaining components of the audio system can be transmitter and observe the RF LED on the front panel energized and adjusted. -
Page 13: Power Switch Function Selection
Watertight Miniature UHF Belt-Pack Transmitter Power Switch Function Selection Frequency Switch Cover Plate The Power ON/OFF Switch can also be used as an audio mute switch. When used as an audio mute switch, the power switch causes the transmitter’s audio to be muted when the Power ON/OFF switch is placed in the OFF position. -
Page 14: Replacing The Power Switch Magnet Housing Assembly
MM400B Replacing the Power Switch Magnet Housing Assembly Although the Power Switch’s Magnet Housing Assem bly is designed to provide years of rugged use it may become inadvertently damaged or lost. Use the following procedure to install a new Magnet Housing Assembly. -
Page 15: Microphone Rf Bypassing
Install the capacitors as follows: Use 330 pF capacitors. Leadless capacitors: P/N SCC330P Capacitors are available from Lectrosonics. Please All Lectrosonics lavaliere mics are already bypassed specify the part number for the desired lead style. and do not need any additional capacitors installed for proper operation. -
Page 16: Replacement Parts And Accessories
MM400B Replacement Parts and Accessories Part/Model # Description 26486 Replacement wire belt clip AMM (xx) Replacement whip antenna, specify frequency block (xx) 21357 Non-watertight audio input plug WPMC-3 Watertight plug kit - 3 pieces WMPC-10 Watertight plug kit - 10 pieces... -
Page 17: Troubleshooting
Watertight Miniature UHF Belt-Pack Transmitter Troubleshooting Before going through the following chart, be sure that you have a good battery in the transmitter. It is important that you follow these steps in the sequence listed. SYMPTOM POSSIBLE CAUSE TRANSMITTER PWR LED OFF 1) Battery is inserted backwards. -
Page 18: Specifications And Features
MM400B Specifications and Features Controls: Front panel knob adjusts audio gain. Operating frequencies: Rotary switches on bottom panel adjust Block 21 537.600 - 563.100 transmitter frequency. Block 22 563.200 - 588.700 Audio Frequency Response: 80 Hz to 20 kHz, +/-1dB, -3 dB @ 70 Hz Block 23 588.800 - 607.900 and 614.100 - 614.300... -
Page 19: Service And Repair
There are no adjustments inside that will make a malfunctioning unit start working. LECTROSONICS’ Service Department is equipped and staffed to quickly repair your equipment. In-warranty repairs are made at no charge in accordance with the terms of the warranty. Out-of-warranty repairs are charged at a modest flat rate plus parts and shipping. -
Page 20: Limited One Year Warranty
This warranty does not apply to used or demonstrator equipment. Should any defect develop, Lectrosonics, Inc. will, at our option, repair or replace any defective parts without charge for either parts or labor. If Lectrosonics, Inc. cannot correct the defect in your equipment, it will be replaced at no charge with a similar new item.
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