Marshall Electronics AR-DM2-B Operating Instructions Manual Download Page 3

Product Overview

The AR-DM2-B is a 16-channel digital audio monitoring system featuring 20-segment tri-color LED bar graphs. Designed
for ultra-near field audio monitoring in space critical environments, the AR-DM2-B is ideal for TV facilities, studios, post-
production facilities, VTR bays, mobile production vehicles, satellite links, and wherever multi-channel audio monitoring is
required.

The AR-DM2-B features stereo loudspeakers in a compact 2RU form factor, with Class D Amplification and 100% digital
processing providing pristine audio quality. Interchangeable input and output modules provide unrivaled flexibility – up to
four I/O modules can be installed in a single AR-DM2-B audio monitor, each module with up to 16 channel inputs,
providing a possible 64 channels per audio monitor. Input choices include balanced/unbalanced AES/EBU, SDI video with
embedded audio, and balanced analog audio. With an optional DOLBY

®

module, the AR-DM2-B supports decoding and

monitoring of

DOLBY

®

E

and

DOLBY

®

DIGITAL

(AC-3) signals, with the option to output discrete decoded channels or

pass through encoded bit streams. Flexible monitoring modes include mono, stereo, and various stereo downmix
configurations for multi-channel audio. 20-segment tri-color LED bar graphs allow simultaneous VU/PPM metering of 16
audio channels. Additional features include volume and balance controls, a headphone jack, and an RS-485 port for on-
site firmware upgrades.

Features

Superior Audio Quality

Stereo Loud Speakers provide superior audio quality in a compact 2RU form factor.

Sixteen LED Bar Graphs

20-Segment Tri-Color LED Bar Graphs allow simultaneous monitoring of VU/PPM levels for 16 audio channels. Bar
graphs also indicate AES/EBU signal presence.

Flexible I/O

Modular design allows the AR-DM2-B to be customized with a variety of inputs and outputs, including balanced and
unbalanced AES/EBU, SDI with embedded audio, and balanced analog audio.

Digital Processing

100% digital signal processing and Class D amplification provide pristine audio signal quality.

Selectable Stereo Downmix Configurations

Multi-channel audio can be downmixed in a variety of stereo configurations including 5.1, 7.1 and more.

DOLBY DIGITAL / DOLBY E Decoding

Optional ARDM-D552 module allows decoding of DOLBY E and DOLBY DIGITAL multi-channel audio signals.
Decoded channels can be output via output modules. A variety of downmix presets based on DOLBY metadata are
available, including Lt/Rt, Lo/Ro, etc.

Firmware Upgradeable

An RS-485 port enables on-site firmware downloads for future upgrades and new features.

® DOLBY is a registered trademark of Dolby Laboratories

Summary of Contents for AR-DM2-B

Page 1: ...Marshall Electronics AR DM2 B Digital Audio Monitor with 20 Segment LED Bar Graphs Operating Instructions...

Page 2: ...e Control 10 Balance Control 10 Mute Functions 10 Reset Functions 10 DOLBY Encoded Signals 11 DOLBY Signal Indication 11 Decoding and Monitoring DOLBY Signals 11 Introduction 11 Entering DOLBY Decodin...

Page 3: ...l audio 20 segment tri color LED bar graphs allow simultaneous VU PPM metering of 16 audio channels Additional features include volume and balance controls a headphone jack and an RS 485 port for on s...

Page 4: ...t Output Module Installation If your audio monitor has not been pre configured with input and output modules at the factory you must install at least one input module to use the audio monitor Addition...

Page 5: ...Hz The Power LED on the front panel will illuminate green 4 Select an Input Module Using the SRC switch on the front panel choose the module location 1 4 to which the input is connected Modules are i...

Page 6: ...See page 8 LED Bar Graphs The LED bar graphs display signal presence and VU PPM information for 16 channels of audio See page 8 Channel Assign and DOLBY Indicator LEDs The channel assign LED below ea...

Page 7: ...included AC power cable to power the AR DM2 L audio monitor RS 485 Port The RS 485 port is used to download firmware to the AR DM2 L audio monitor Contact Marshall Electronics regarding available fir...

Page 8: ...once the module is removed from the audio monitor Volume Balance and Mute settings are common to all modules LED Bar Graphs The LED bar graphs display signal level information for each audio channel...

Page 9: ...Mode Press the Mix button to monitor a stereo downmix of multiple audio channels Press the 9 16 button to downmix channels 9 16 Three downmix configurations are available 5 1 7 1 and 4L 4R The channe...

Page 10: ...phone output Press the MUTE button once to mute both the speakers and headphone output Press again to un mute Pressing the MUTE button multiple times in succession has the following additional functio...

Page 11: ...6 discrete channels of audio DOLBY DIGITAL is typically used to transmit a multi channel audio program to consumers on a DVD or through DTV What is DOLBY E DOLBY E is an encoded bitstream that carrie...

Page 12: ...1 2 C C C 1 2 Ls Rs L R 1 2 LFE LFE C 1 2 Lt Rt L R C C L R 1 2 L C R C L R C 2 2 Stereo Ch L R 5 1 2 2 2 L R L R C C 1 2 Stereo Ch L R 1 2 L R L R C C 2 2 Stereo Ch L R 2 2 2 2 L R L R C C 1 3 Stereo...

Page 13: ...le Embedded Metadata Display with AR DM2 L Audio Monitor Operation 1 Securely connect included DB 25 cable to module tightening screws on the connector 2 When using passive the loop through outputs un...

Page 14: ...4OUT module Monitoring individual channels does not affect the output ARDM AA 2OUT Features 2 Balanced Analog Audio Outputs Built In XLR Connectors Outputs the Stereo Mix currently selected on the au...

Page 15: ...ank cover if present over the empty slot using a Philips screwdriver with appropriate head size 3 Carefully slide the module into the open slot aligning the side edges of the module with the guides in...

Page 16: ...rist strap or another type of grounding device Opening the AR DM2 B Audio Monitor without proper anti static precaution may void the warranty For further information contact Marshall Electronics Use t...

Page 17: ...up 6 Slowly push the module down so that it is parallel to the main board Two metal brackets on either side of the slot will snap into place over the edges of the module holding it place If the module...

Page 18: ...ker Power Output Left Right RMS 4 10W 14W Peak Woofer RMS 4 25W 35W Peak Peak Acoustic Output 104dB SPL Headphone Power Output 150 mW ELECTRICAL Power Consumption Less than 45W Voltage Input 100V 240V...

Page 19: ...Inputs 4 x AES EBU Balanced 110 XLR F via DB 25 Connector Outputs 4 x AES EBU Balanced 110 XLR M via DB 25 Connector Passive Loop Through Formats Professional and Consumer SPDIF Audio Coding PCM DOLBY...

Page 20: ...erefore labor and parts may be charged to the consumer This warranty does not apply to the product exterior or cosmetics Misuse abnormal handling alterations or modifications in design or construction...

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