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Lectrosonics AM16/12 Operating Instructions Manual

16 channel automatic matrix mixer
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AM16/12
16 Channel Automatic Matrix Mixer
OPERATING INSTRUCTIONS
and trouble-shooting guide
LECTROSONICS, INC.
Rio Rancho, NM
www.lectrosonics.com

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  • Page 1 AM16/12 16 Channel Automatic Matrix Mixer OPERATING INSTRUCTIONS and trouble-shooting guide LECTROSONICS, INC. Rio Rancho, NM www.lectrosonics.com...

  • Page 2: Table Of Contents

    The AM16/12 is the most advanced automatic matrix mixer available today. Combining 16 automatic input channels, 12 output channels, and a full crosspoint matrix system into 2 rack spaces, the AM16/12 is a compact solution for a wide variety of sound system applications. 15 nonvolatile preset memory positions mean complete flexibility and reconfigurability.

  • Page 3: General Technical Description

    16 Channel Automatic Matrix Mixer GENERAL TECHNICAL DESCRIPTION The AM16/12 uses a straightforward analog signal path to provide excellent audio performance. This is coupled with a sophisticated microcontroller to implement the automatic mixing, matrix control, room combining, and programmable input and output functions. The Adaptive Level Proportional automatic mixing algorithm is used by the AM16/12. This algorithm uses the signal level pattern at the microphones to derive a pattern of channel gains.

  • Page 4: Installation

    AM16/12 Audio Outputs Each of the 12 AM16/12 outputs is balanced, and outputs 9 - 12 may be set for line or microphone level output. To use an output in the unbalanced line level mode, take the signal from the “+” output connection and the output ground.
  • Page 5 Audio Expansion In/Out connectors on the rear panel of the AM16/12. These two 30 pin headers are just to the right of the LecNet (RS232) jack on the rear panel. A 3" 30 conductor ribbon cable is supplied with each AM16/12 for this purpose.
  • Page 6 Video Codec Connecting the AM16/12 to the AM8 Connecting the AM16/12 to the TH3A and a video codec LecNet Expansion In/Out When other LecNet devices are used in conjunction with the AM16/12s, the LecNet Expansion ports of these devices must also be interconnected. Refer to the diagrams above for proper interconnections. The LecNet Expansion In and Out pinouts are shown below.

  • Page 7: Front Panel Description

    CHANNEL ACTIVITY LEDS - Indicates channel activity. The LEDs light when the attenuation applied by the auto­ matic mixing algorithm is less than or equal to 6dB. The indication of channel activity is responsive to the Input Qualification and Output Hold time parameters, which may be set in the Miscellaneous tab of the AM16/12 control panel.

  • Page 8: Rear Panel Description

    AUDIO EXPANSION IN/OUT - Allows multiple AM16/12s to be linked together when more than 16 inputs are needed. In multiple AM16/12 setups, one AM16/12 is set to be the Master, and all others are set to be Slaves. The Audio Expansion In of the Master AM16/12 is connected to the Audio Expansion Out of the first Slave AM16/12, using the supplied 30 pin ribbon cable.

  • Page 9: Operating Instructions

    Input preamp gain is set using the dip switches just to the left of each 5 pin input connector. Dip switch settings for 0dB, +30dB, and +50dB input gain are shown on the rear panel of the AM16/12. Generally, the +50dB position is used for all dynamic microphones and electret microphones where the working distance from the microphone will be greater than about 18 inches.
  • Page 10 Each input channel has two gain control points, in addition to the rear panel preamp gain switches. The input control point labeled “Input Trim” is adjusted using the Input Gain tab on the AM16/12 control panel. This control is used to adjust the sensitivity of each microphone or line level input to the desired gain.
  • Page 11 This option is not available in the Programmable Inputs tab, but is set automatically by the AM16/12 control panel when the room combining function is active. Not Used: Unassigns a programmable input from any system function.

  • Page 12: Am16/12 Control Panel Software

    All Presets selection copies all 15 presets to the AM16/12. After a preset is loaded to the AM16/12, it will be transferred to the active AM16/12 setup. If all 15 presets are loaded, preset 1 will be made the active preset.
  • Page 13 Auto mode. Direct mode is useful for line level sources. NOM Bus - Sets the NOM bus association for each input. The AM16/12 has 8 NOM busses, and any input may be assigned to any NOM bus, or to “None”. All inputs assigned to the same NOM bus act like a single automatic mixer, in that their instantaneous gains are determined by the relative signal levels on all other inputs assigned to that NOM bus.
  • Page 14 With 8 NOM busses, up to 8 separate mixers can be configured with the AM16/12. If an input is assigned to “None”, it will neither affect any other channel’s automatic gain or be affected by another channel. Short Cuts: A left mouse click on the NOM box will associate the input with NOM bus 1, while a right mouse click will set the association to “None”.
  • Page 15 Exp In and Noise. Exp In is the signal from the 8 pin mini-DIN LecNet Expansion In connector on the rear panel of the AM16/12. This signal would be used if another LecNet device, like a TH3A Telephone Hybrid, were connected to the AM16/12 via the expansion cable.
  • Page 16 Note that the Increase and Decrease buttons are push-and-hold, and will increment or decrement the output gain for as long as they are held down. Programmable Inputs Tab The AM16/12 has 17 program­ mable inputs (available on the 25 pin D-Sub connector on the rear panel) which allow control of a wide variety of AM16/12 functions.
  • Page 17 Apply Button - Applies the current setting of “Function” and “Applies To” to the current programmable input. When the Apply button is enabled, this indicates that the setting of “Function” and “Applies To” in the AM16/12 does not match the setting of “Function”...
  • Page 18 Increase In 1dB / Decrease In 1dB - Allows one or more input gains to be controlled by a contact closure on a programmable input pin. Increase and Decrease input gain control goes from a maximum of 0dB gain to a minimum of 30dB attenuation, plus “Off”.
  • Page 19 This guarantees that the desired programmable input/memory preset associations are stored in all memories of interest. The screen to the right indicates that the function of programmable input 1 is to recall AM16/12 Memory Preset 1. Rio Rancho, NM – USA...
  • Page 20 Toggle Crosspoint Gain - Allows for a temporary matrix connection to be made between one input and any combination of outputs, at any one of the available crosspoint matrix gains. The first momentary contact closure on the program­ mable input pin will make the specified input-to-output(s) con­...
  • Page 21 Prog. Outputs Tab The AM16/12 has 19 program­ mable outputs (available on the 25 pin D-Sub connector on the rear panel) which can indicate either channel activity or the current state of a programmable input.
  • Page 22 Apply Button - Applies the current setting of “Function” and “Applies To” to the current programmable output. When the Apply button is enabled, this indicates that the setting of “Function” and “Applies To” in the AM16/12 does not match the setting of “Function” and “Applies To” shown on the control panel screen. Clicking the Apply button will load the control panel setting into the active AM16/12 setup.
  • Page 23 Associated output(s) muted The screen below shows programmable output 1 indicating the status of programmable input 1. Room Combining Tab The AM16/12 has built-in room combining capability to support up to 4 rooms. Note that up to 8 rooms may be combined (using...
  • Page 24 Preset memory 2 could be set for room combining not active, in which case you can use the AM16/12 in any way that meets your needs.
  • Page 25 Boundary Switch Programmable Input Assignment - Shows the assignment of programmable input pins made by the AM16/12 control panel for room boundary connection switches. For each boundary you’ve selected, you’ll see a line. This line includes the programmable input number assignment, as well as the actual pin number on the 25 pin Programmable Inputs D-sub connector on the rear panel.
  • Page 26 Shown below is the proper setup for teleconferencing or video conferencing assuming all 16 inputs are near end microphones to be sent to the far end, and further that all inputs are associated with AM16/12 NOM bus 1 (see the Input Gain tab to establish these associations).

  • Page 27: Troubleshooting

    Here are a few tips for diagnosing problems: 1) If you get no sound (and the AM16/12 power is on), first check the Input Gain tab. If the number in the Gain box is too low, you might want to turn it up a bit. If the Gain box has a red background, it means the input has been muted.

  • Page 28: Serial Cable Wiring Diagrams

    SERIAL CABLE WIRING DIAGRAMS The serial port on the AM16/12 is a minimal RS-232 implementation. The figure shows the wiring diagram to accommodate interconnection with either a 9 or a 25 pin serial port on a PC or other serial device.

  • Page 29: Serial Port Commands Available

    4) The LecNet device sends to the host 7 bytes. The first byte is 6 hex, which is the number of bytes in the AM16/12’s name string. The AM16/12 will then send the ASCII characters “A”, “M”, “1”, “6” , “1” and “2” to the host.
  • Page 30 Host sends command - 1 (1 hex) Host receives 7 bytes: Byte 1 is the length of the name string (6 for the AM16/12), bytes 2 - 7 are the ASCII values for “AM1612” (65, 77, 49, 54, 49, 50).
  • Page 31 6dB. Note that the input activity status is conditioned by the input qualification time and the output hold time, which may be set in the Miscellaneous Settings tab of the AM16/12 control panel application. Host sends command - 20 (14 hex)
  • Page 32 Get Output Gain - Gets the output gain associated with any one output or all 12 outputs. This gain value is the same one you can manipulate from the Output Gain tab on the AM16/12 control panel. Host sends command - 61 (3D hex) Host sends 1 byte: output number to return, 0 - 11 (0-B hex) returns the single gain value from outputs 1 ­...
  • Page 33 AMX or Crestron control systems, because very complex AM16/12 actions may be triggered by one serial command. The programmable input must first be programmed with the desired function using the Programmable Inputs tab on the AM16/12 control panel before this command is used.

  • Page 34: Specifications

    This product meets the CE Compliance Standards - EN55022 and EN50082-1:1998. A copy of the Declaration of Conformity may be requested from your dealer or by contacting the factory directly: Lectrosonics, Inc. Marketing Department 581 Laser Rd. NE, Rio Rancho, NM 87124 USA tel: 505-892-4501 fax: 505-892-6243 e-mail: marketing@lectrosonics.com...

  • Page 35: Service And Repair

    There are no adjustments inside that will make a malfunctioning unit start working. The 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 36: 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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