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Lectrosonics MM8 Operating Instructions Manual

12 input / 8 output matrix mixer
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MM8
12 INPUT / 8 OUTPUT MATRIX MIXER
OPERATING INSTRUCTIONS
and trouble-shooting guide
LECTROSONICS, INC.
Rio Rancho, NM

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Summary of Contents for Lectrosonics MM8

  • Page 1 12 INPUT / 8 OUTPUT MATRIX MIXER OPERATING INSTRUCTIONS and trouble-shooting guide LECTROSONICS, INC. Rio Rancho, NM...

  • Page 2: Table Of Contents

    INTRODUCTION The MM8 is a high quality 12 input, 8 output audio matrix mixer. Any combination of inputs may be routed to any combination of outputs. Output channel gain can be adjusted from +10dB to -68dB in 1dB increments, plus Off. Input send levels to each output offer three selectable gains: -6dB, 0dB, +3dB, plus Off.

  • Page 3: General Technical Description

    Out connectors allow simple expansion of the input capability of the system. An RS-232 port is available to allow many of the functions of the MM8 to be controlled either by a computer or a dedicated control system (such as the AMX or Crestron systems).

  • Page 4: Installation

    INSTALLATION Installing the MM8 properly is simple, and only requires attention to a few issues. The MM8 should be used in a grounded metal rack. More than one MM8 may be used if more than 12 inputs are necessary. The 9-pin Audio Link In/Out D-sub connectors allow the audio paths of multiple MM8s to be interconnected.

  • Page 5: Front Panel Description

    UP and DOWN Buttons - Increments or decrements the values in the active menu category. If the Up and Down buttons are both pushed while the power is turned on, the MM8 will be returned to factory default condition. Factory defaults are as follows: 1) All input gains in all memories are set to Off.

  • Page 6: Rear Panel Description

    Note that the number of outputs available is 8, no matter how many MM8s are interconnected. RS-232 SERIAL PORT - Provides access to and control of some of the operational features of the MM8. The port is compatible with the serial port of a PC, or other controllers with RS-232 type serial ports. For hardware interconnec- tion and software details, see Appendix 1, “Serial Port Hardware and Software”.

  • Page 7: Operating Instructions

    After setting the input and output levels, the setup may be saved to one of the 9 nonvolatile memories. Each time power is applied to the MM8, it loads the setup from Memory 1. As a result, Memory 1 should be used to store the setup that is desired at power-up.

  • Page 8: Troubleshooting

    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 9: Specifications

    12 Input / 8 Output Matrix Mixer SPECIFICATIONS Line Input Type: Electronically balanced and RF filtered Impedance: Greater than 10K, balanced or unbalanced Input Gain Settings: -6dB, 0dB, +3dB, plus Off Maximum Input Level: +20dBu at 0dB gain Line/Mic Output Type: Electronically balanced and RF filtered Impedance:...

  • Page 10: Serial Cable Wiring Diagram

    (PC) If you are using an AMX system to control your LecNet equipment, you’ll want to purchase the Lectrosonics PT3 Protocol Translator. The PT3 connects between the AMX bus and any LecNet equipment. With the PT3, the LecNet equipment looks just like native AMX equipment. The PT3 is the fastest and most productive way to control LecNet devices with an AMX system.

  • Page 11: Serial Port Commands Available

    Valid address values are 128-254 (80h-FEh). 255 (FFh) is an invalid address and must not be used. Because the MM8 will interpret any single data byte whose value is greater than 127 as an address, single byte data (as opposed to addresses) sent from the host must be in the range of 0-127.
  • Page 12 Acknowledge - Causes the MM8 sends its “name” bytes back Host sends command - 1 Host receives 4 data bytes: Byte 1 is the number of bytes in the name string (3 for the MM8), followed by the ASCII characters “MM8”.

  • Page 13: Memory Commands

    12 Input / 8 Output Matrix Mixer Set Current Input Gain - Allows the current input gain to be set. Range is from 0-3, where 0 corresponds to Off, 1 to - 6dB, 2 to 0dB, and 3 to +3dB. Host sends command - 4 Host sends 3 data bytes: Byte 1: Desired input number.
  • Page 14 Bytes 2-61: Matrix setup data bytes, formatted as in Output Complete Memory Setup (7) above. Note that after each data byte is sent by the host, the MM8 will send a byte of 100 as an acknowledgement of a successful write to EEPROM.
  • Page 15 12 Input / 8 Output Matrix Mixer Misc. Mute Crosspoint - Allows muting of specific or all input channels to a specific output. Host sends command: Dec 112 or Hex 70 Host sends two data bytes: First Data has a range of 0-12 0 = All Input Channels exclusive of the Noise Source 1-12 = Specific Input Channel 13 = Noise Source...

  • Page 16: 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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