Rutter VDR-100G3 Installation Manual page 73

Below is an example of a typical S-VDR 4-channel Audio Module arrangement:
Channel 1: Transmitted and received signals from the primary VHF radio;
Channels 2, 3, and 4: 2 FWD Helm Area microphones, 2 AFT Chart Table/GMDSS Area
microphones, and 2 Outdoor Wing Area microphones.
In this configuration, the inputs are utilized as follows:
VHF TX/RX: Input 1-2
Internal Microphones: Input 3-4 and Input 5-6
External Microphone: Input 7-8
The Audio Module digitizes the audio inputs from all input channel and transmits the combined
data through the Ethernet port.
NOTE: Optional 6-input channel (12 input-port) or 8-input channel (16 input-port) Audio Modules
are available for capturing audio data from additional microphones or other sources.
Additional specifications:
The audio inputs can be configured as either microphone or line level (VHF) connections
during installations;
The 8, 12, or 16 audio inputs are mixed 2:1 (either LEFT/RIGHT or FWD/AFT for
microphones, or TX/RX for VHF) to produce 4, 6, or 8 data input channels;
Separate gain control potentiometers on the circuit board, can be adjusted for each audio
input. These levels are preset during manufacturing; and
The Audio Module Ethernet is connected to a dedicated Ethernet port on the DMM.
The placement of microphones on the bridge is critical to ensure that all required areas on the
bridge which require audio recording are monitored. The areas to be covered include:
Conning/helm stations;
Radar displays;
Chart tables; and
All other bridge workstations;
There are 2 types of microphones available with the VDR-100G3. Both microphone assemblies
include an integrated microphone test buzzer:
1. Indoor microphones are black and use condenser style boundary technology.
They usually mount to the ceiling in the bridge area, with a junction box located
above the ceiling for cable connection; and
2. Outdoor microphones are white, use condenser style boundary technology and
come with an externally mounted wiring junction box.
The microphone locations must be determined during the planning phase of installation.
The Audio Module supports a maximum of 8 audio input channels. Typical channel input sources
include:
Pairs of indoor microphones;
A pair of outdoor microphones, and
A transmit (Tx) and receive (Rx) VHF radio line (as in Duplex systems) or combined
Tx/Rx on a single pair of wires (as in Symplex systems).
NOTE1: Primary VHF MUST be on separate channels
NOTE2: If only 1 microphone will be connected to an audio input channel, it must
be wired to the top input (odd number) of the channel for proper self test
operation.
VDR-100G3/G3S Installation Manual
Chapter 8: Audio Module, Rev 1.1
8-2
06/10/2008