Marshall Amplification AR-DM51-B Bedienungsanleitung

Broadcast A/V Division

AR-DM51-B

Digital Audio Monitor

User Manual

Table of Contents

2. Features

3. Package Contents

4. Front Panel

5. Control Buttons

6. Rear Panel

7. Speciﬁcations

8. Operation

9. Setting or Changing the IP Address

10. Updating Firmware

1. Introduction

10. Warranty 14

AR-DM51-B Manual

www.marshall-usa.com 2

The Marshall AR-DM51-B Digital Audio Monitor emphasizes a straight-forward, high-quality design

and simplicity of operation. The AR-DM51-B exceeds the capabilities of many larger 2RU designs,

and is equally at home in production ﬂy packs, news vans, remote OB vans, and equipment rooms.

High Performance Audio

• Matches or exceeds many larger 2RU designs

• Enough “punch” for the noisiest server rooms (up to 100dB)

Multiple Input Types

• 3G SDI with Looping Output

• HDMI

• Analog XLR Balanced - 2 Channels

• Analog RCA Unbalanced Line Level - 2 Channels

Flexible Output Types

• AES-EBU Pair Balanced XLR (converted from Analog input)

• Analog Unbalanced RCA Line Level - 2 Channels

2” Video Display

• Provides conﬁdence image of selected HDMI or SDI source

• Text indicates Source, Format, Selected Channels and more

Controllable via Ethernet or RS-232 Serial

• Remote Control App and Protocol available on Marshall Website

Compact 1RU Design Saves Rack Space

• Minimum size

• Low power consumption, low heat emission into rack

1. Introduction

2. Features

Please ensure the following are included:

• One AR-DM51-B Main Chassis

• One 12-Volt Universal Power supply (120/240V – 50/60Hz)

1. Speakers

Provides sound from selected channel pair except when Solo buttons are pressed.

2. LCD Video Display

When an HDMI or SDI source is being monitored, the associated video will appear here. Also a

text overlay shows input source, selected audio channels, and source video parameters.

Note: The LCD display will be black when Analog Sources are selected.

3. Headphone Jack

Designed to accept stereo headphones with 3.5mm plug.

4. Control Buttons

Provides quick access for standard equipment operation.

5. Volume / Mute Knob

Turn the knob to adjust the sound level of both speakers.

Press in on the knob to instantly Mute the speakers.

3. Package Contents

4. Front Panel

1 3 4 52

AR-DM51-B Manual

www.marshall-usa.com 4

1. Solo Left & Solo Right

Press one of these to isolate the left or right channel only.

Note: Sound will come out of both speakers when a solo channel is selected but will originate from a single source.

2. Left / Right Arrow Buttons

Press the Left Arrow button to select a lower numbered pair of channels, press the Right Arrow

button to select a higher numbered pair of channels.

For example, when monitoring channels 3 & 4, pressing Left Arrow will switch to channels 1 &

2, pressing Right Arrow will switch to channels 5 & 6. The lower-numbered channel audio in a

selected pair will play from the Left speaker. The higher-numbered channel audio will play from

the Right speaker.

3. Up / Down Arrow Buttons

Press the Up Arrow to select channel group 1 – 8, press the Down Arrow to select channel

group 9 – 16.

Note: This applies to SDI sources only

4. Input

Press to change input source (input type) in this order:

• HDMI

• SDI

• Analog (XLR Balanced)

• Analog (RCA Unbalanced)

5. Down Mix

The button on the far right provides a stereo mix from 5.1 or 7.1 surround sources.

5. Control Buttons

1 2 3 4 5

6. Rear Panel

1 2 4 5 6 7 8 9 103

1. Power Switch

2. 12-Volt DC Power Input XLR 4-pin

3. RS-232 Serial Control 9-pin D-Sub Port

4. Ethernet Control RJ-45 Port

5. HDMI Input

6. SDI Input and Loop Out

7. Analog Balanced XLR Inputs (2 channels)

8. AES/EBU Output XLR (2 channel pair converted from balanced analog input)

9. Stereo Unbalanced Input 2 channel RCA jacks

10. Stereo Unbalanced Output 2 channel RCA jacks

AR-DM51-B Manual

www.marshall-usa.com 6

7. Speciﬁcations

Model Name

Technical

Mechanical & Electrical

Video Inputs

Video Formats Supported

Audio Inputs

Audio Outputs

Digital Audio Supported

Signal to Noise Ratio (SNR)

HDMI connector

Serial Control Connector

Network Connector

Housing

Dimensions [H x W x D]

Weight

Mounting

Included Power supply

Power consumption

Operation temperature

Storage temperature

Relative humidity

ESD protection

HDMI HDCP

HDMI 2.0 x 1

3G SDI x 1 with looping output

HDMI Up to 4K2K@60fps (4:4:4 sampled 8-bits)

SDI up to 1080p50, 59.94,60 (4:2:2 sampled 10-bits)

Analog Balanced x 2 XLR Female

Analog Unbalanced x 2 RCA Jack

AES/EBU x 1 (Digital Pair) XLR Male

Analog Unbalanced x 2 RCA Jack

PCM 2, 5.1, 7.1 channels

85 dB

HDMI type A

DB-9 [9-pin D-sub female] supports RJ-45 for Ethernet control

WE/SS 8P8C for control via Ethernet

Metal enclosure

1.75” X 19” x 8.5” / 4.45 cm x 48.25 cm x 21.6 cm

7.3 lbs / 3.3 Kg

Chassis has “ears” for standard 19” rack mount

Rated 12 VDC 5 Amps, AC Input (120 - 240 VAC)

6 Watts Avg

0~40 C [32~104 F]

-20~60 C [-4~140 F]

20~90% RH [no condensation]

Human body model — ±15kV [air-gap discharge] & ±8kV [contact

discharge]

HDCP 2.2 and 1.4 Supported

AR-DM51-B

8. Operation

Controls on the AR-DM51-B are designed to be extremely straight-forward. To start, simply press the

Input button to select the desired source, then adjust the volume knob to the desired listening level.

Metering Type

The default audio metering type is PPM (Peak Program Meter). The metering type can be switched

to VU (averaging) using the remote control software or press Mix Down button for 3 seconds.

Monitoring HDMI Sources

When HDMI is selected, video from that source will appear on the front panel LCD display along

with information about the video format and selected audio channels. This is a convenient feature

allowing quick conﬁrmation that the desired source is being monitored. Channels 1 & 2 will appear

on the LED meters and be heard from the speakers. Up to 8 audio channels may be carried in an

HDMI program. These are often arranged as 5.1 or 7.1 surround. Use the Right or Left arrow buttons

to hear other channel pairs or press the Mix Down button to hear all of the channels as a stereo mix.

Monitoring SDI Sources

When SDI is selected, video from that source will appear on the front panel LCD display along with

information about the video format and selected audio channels. Channels 1 & 2 will appear on the

LED meters and be heard from the speakers. SDI can carry up to 16 channels, organized as two

groups of 8 channels each. Press the Right or Left arrow buttons to hear other channels in the ﬁrst

group (channels 1 – 8).

Press the Up or Down arrows to select the second group (channels 9 – 16) then press Left or Right

to select channels in this group.

Monitoring Analog Sources

Connectors are provided for either broadcast level +4DBm balanced audio (XLR) or AV line level

-10dBm unbalanced (RCA) audio. When the LED meters are in PPM mode, a broadcast level tone

at +4dBm will indicate at the arrow mark on the meter bar, line level 10 at -10dBm will indicate at the

same point when connected via the RCA connectors.

In addition to metering and monitoring, analog sources are sampled and converted to AES digital

and will appear at the AES/EBU connector on the back panel. The AES connection is balanced

110-ohm type.

Note: If it is desired to connect to equipment that accepts AES digital audio on a 75-ohm BNC connector, please

use a 110-ohm to 75-ohm “balun” converter.

AR-DM51-B Manual

www.marshall-usa.com 8

9. Setting or Changing the IP Address

STEP 1

If you know the current IP address you can skip to Step 6.

If the IP address is not known, it maybe be discovered and changed using an RS-232 serial

connection. If you do not have a way to connect via RS-232, low cost adapters can easily be

ordered on-line by searching for “USB to RS-232 adapter”.

Here’s an example of one from Amazon. Note the

pins pointing out from the RS-232 end. This is a

“straight through” cable, not a “crossover” or “null

modem” version.

Windows will provide drivers for this product

automatically once the USB part is plugged in.

STEP 2

Obtain the latest control software from the Marshall website. This will likely come bundled with

the latest Firmware update ﬁle.

https://marshall-usa.com/monitors/audio/model/AR-DM51-B.php

Find the link on this page Control Software, click it, download the ﬁle and UnZip it.

Step 3

Run the AR-DM51-B Remote application. It should run immediately without an installation step.

You will see this screen.

STEP 4

Next, click the RS232 button. Allow a moment for the AR-DM51 to respond. If there is only one

Com Port running on the computer, the App will usually connect automatically. This is apparent

when green bars appear next to Brightness, Contrast and Saturation. When the App does not

connect automatically, you will need to select a port number from the pulldown menu. If this is the

wrong port number, a small error message will appear. Close the message and select a different

port number unit the AR-DM51 responds.

Next, click the Read button.

The Current IP address, Subnet Mask, Gateway and MAC Address should appear.

A small window with “Finish!” will appear as well. You can close that window by clicking OK.

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