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LWB-16M/64 Optical Wiring System
LWB Commentary & Communication System - Features

Feature 1: Routing

  • Communication Matrix: Any of the In (Talk) side of an intercom channel, and each box’s talk channel or audio input channel can be freely routed to the Out (Listen) side of an intercom channel and a monitor channel of a box (routing is done on the single channel (mono) basis).
  • Routing of MIC Line: Each commentary box has one microphone input channel for the MIC line (broadcast program) from which the following routing can be done:
    • To any multiple audio output channels
    • To the Out (Listen) side of any multiple intercom channels
    • To any multiple monitor channels
  • Routing of Talk Lines: Each commentary box has four and each remote box has eight talk channels from which the following routing can be done:
    • To any multiple audio output channels
    • To the Out (Listen) side of any multiple intercom channels
    • To any multiple monitor channels
  • Routing of Monitor Lines: Each commentary box has four and each remote box has eight monitor channels to which the following routing can be done:
    • From any multiple audio input channels
    • From the In (Talk) side of any multiple intercom channels
    • From any multiple MIC lines or talk channels

Feature 2: Crosspoint Gain Control

Up to eight input channels can be routed to (summed with) each box’s monitor channels (and intercom channel’s OUT (Listen) side) and these input channels are sometimes routed to other monitor or audio output channels. This system provides the crosspoint gain control function so that users can monitor each audio signal in optimal balance even in such a complex routing (communication matrix).

This function operates as follows:

  • The crosspoint gain control is implemented in the monitor channels [A] and OUT (Listen) side of intercom channels [B] on each box.
  • For each of input channels (max. 8) routed to any channel of A and B, it is possible to adjust its level within A and B.
  • Up to eight input channels routed to A and B are summed after individual level adjustment and then fed to A and B.
  • The level adjustment range is from -48 to +12 dB (in 1 dB steps) to be applicable not only for trimming but also audio signal attenuation.

Feature 3: Head Amplifier Control

The head amplifier for the microphone input channels on the commentary box and audio box can control the following items.

  • Head Amplifier Parameters and Settings: +48-volt phantom power [on/off], -25-decibel pad [on/off], Limiter [on/off], Gain (when pad is off) [17 to 72 dB]
  • Remote Control: If routed to any audio output channel within the same system, a head amplifier can be controlled remotely from the LWB unit to which the corresponding output channel is installed just like LWB unit’s microphone input channels.
  • Volume Control for Talk Channel: Each talk channel is a split from the head amplifier back-end of the microphone input channel for the MIC line. Therefore, there is no head amplifier for each talk channel and changing the head amplifier gain, etc. for the MIC line will affect the talk channel. The talk channel volume is controlled from the monitor channel.
  • Clip Hold: Microphone input channels on the audio box suppor the clip hold function (no clip hold will occur in the MIC line on the commentary box).