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Lectrosonics AM8 Operating Instructions And Owner's Manual

8 channel automatic matrix mixer
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AM8/4
8 Channel Automatic Matrix Mixer
OPERATING INSTRUCTIONS
and trouble-shooting guide
LECTROSONICS, INC.
Rio Rancho, NM
www.lectrosonics.com

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Summary of Contents for Lectrosonics AM8

  • Page 1 AM8/4 8 Channel Automatic Matrix Mixer OPERATING INSTRUCTIONS and trouble-shooting guide LECTROSONICS, INC. Rio Rancho, NM www.lectrosonics.com...

  • Page 2: Table Of Contents

    2 auxiliary line inputs channels, 4 output channels, and a full crosspoint matrix system into 1 rack space, the AM8/4 is a compact solution for a wide variety of sound system applications. 8 nonvolatile preset memory positions mean complete flexibility and reconfigurability.

  • Page 3: General Technical Description

    Minus signal is available which allows easy interfacing to teleconferencing hybrids like the TH3. An RS-232 port is available to allow many of the functions of the AM8/4 to be controlled either by a computer or a dedicated control system (such as the AMX or Crestron systems).

  • Page 4: Installation

    The 2 line inputs are balanced but without switchable Phantom power. AM8/4 Audio Outputs Each of the 4 AM8/4 outputs is balanced. To use an output in the unbalanced mode, take the signal from the “+” output connection and the output ground. Leave the “-” output floating.
  • Page 5 When multiple AM8/4s are used in an application, their Audio Link ports must be interconnected using the Audio Link In/Out connectors on the rear panel of the AM8/4. The Audio Link In/Out connector is just to the right of the Program- mable In/Out connector on the rear panel.

  • Page 6: Front Panel Description

    When other LecNet devices are used in conjunction with the AM8/4s, 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: Rear Panel Description

    AUDIO EXPANSION IN/OUT - Allows multiple AM8/4s to be linked together when more than 8 inputs are needed. In multiple AM8/4 setups, one AM8/4 is set to be the Master, and all others are set to be Slaves. The Audio Expansion In of the Master AM8/4 is connected to the Audio Expansion Out of the first Slave AM8/4, using the supplied LecNet Expansion cable.

  • Page 8: Operating Instructions

    The AM8/4 control panel may be used in one of two ways. When launched from the LecNet Master Pro application, you can control all the parameters of the AM8/4 in real time. Needless to say, your PC must be connected to the AM8/4 using the supplied LecNet serial cable in order for this to happen.
  • Page 9 Remote Input/Output Level Limits tab on the AM8/4 control panel. In addition, you may set a rear panel preset gain value that will be applied to any outputs which are being controlled by a programmable input.

  • Page 10: Am8/4 Control Panel Software

    File Menu Options Copy Preset(s) to AM8/4 from Disk File... - Allows any preset stored to a disk file (.amd file extension) to be loaded to the corresponding AM8/4 memory preset. The Preset 1 through Preset 8 selections copy a single preset, while the All Presets selection copies all 8 presets to the AM8/4.
  • Page 11 8 Channel Automatic Matrix Mixer Enter Input/Output Names... - Allows names to be assigned to the 10 inputs and the 4 outputs of the AM8/4. These names may be up to 15 characters long and are stored in nonvolatile memory in the AM8/4. In addition, the names are stored in any disk files generated with any of the save to disk options above.
  • Page 12 Input Gain Tab The Input Gain tab allows the input gain and Send/React to NOM status to be set for each of the 8 automatic input channels, and the input gain to be set for the two line input channels. Gain - Allows the input gain level to be trimmed between +15dB and -63dB, or Off.
  • Page 13 Exp In is the signal from the dual 8 pin mini-DIN LecNet Expansion In connector on the rear panel of the AM8/4. This signal would be used if another LecNet device, like a TH3 Telephone Hybrid, were connected to the AM8/4 via the expansion cable.
  • Page 14 (available on the 15 pin D- Sub connector on the rear panel) which allow control and indication of a wide variety of AM8/4 func- tions. Pins 1-8 on the rear panel D-Sub can be programmed to be either programmable inputs or...
  • Page 15 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 AM8/4 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 AM8/4 setup.
  • Page 16 Minimum Input Gain, if it is programmed for less attenuation than “Off”), and +5VDC corresponds to 0dB. In addition to analog control, this mode can be used to perform input “muting” using a simple toggle switch. To mute input(s), simply connect the toggle switch to connect the programmable input to ground (GND pin). The screen shown below indicates that the function of programmable input 1 is analog input control of inputs 1, 2, 8, and Line 1.
  • Page 17 The screen below shows that the function of programmable input 1 is to recall AM8/4 Memory Preset 1. Toggle Crosspoint Gain - Allows for a temporary matrix connection to be...
  • Page 18 Not Used - Unprograms a programmable i/o such that there will be no action associated with it. Remote I/O Level Controls Tab The Remote I/O Level Controls tab allows AM8/4 remote level control parameters to be set. Rear Panel Input Controls -...

  • Page 19: Troubleshooting

    1) If you get no sound (and the AM8/4 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 20: Serial Cable Wiring Diagram

    Crestron (PC) Port Wiring Diagram, 25 Pin D-Sub LecNet Device Transmit Ring LecNet Device Receive The serial port on the AM8/4 is a minimal RS-232 Sig Gnd Sleeve Host implementation. The figure shows the wiring diagram Chassis Gnd Serial LecNet Port...

  • Page 21: Serial Port Commands Available

    As an example of a specific interchange between a host and an AM8/4 the following general procedure would be used to get a name string back from an AM8/4: Set up the communications parameters of the device which will be the host.
  • Page 22 Host sends command - 1 (1 hex) Host receives 5 bytes: Byte 1 is the length of the name string (4 for the AM8/4), bytes 2, 3, 4, and 5 are the ASCII values for “AM84” (65,77,56,52) Set Device Address - Sets the AM8/4’s device address and stores the new address in nonvolatile memory.
  • Page 23 Get Output Gain - Gets the output gain associated with any one output or all 4 outputs. This gain value is the same one you can manipulate from the Output Gain tab on the AM8/4 control panel. Host sends command - 61 (3D hex) Host sends 1 byte: input number to return, 0 - 3 returns the single gain value from outputs 1 - 3, while 4 returns 4 bytes representing the output gain of all outputs, starting with output 1.
  • Page 24 Matrix Crosspoint Commands Get Crosspoint Gain - Gets the gain associated with a particular matrix crosspoint. Host sends command - 81 (51 hex) Host sends 2 bytes: Byte 1:Input associated with the desired crosspoint. 0 - 10 (0-0A hex), where 0 - 9 corresponds to inputs 1 - 10, and 10 (0A hex) corresponds to the Expansion In.
  • Page 25 AMX or Crestron control systems, because very complex AM8/4 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 AM8/4 control panel before this command is used. Host sends command - 92 (5C hex)

  • Page 26: 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 27: 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 28: 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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Am4

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