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Marshall Electronics AR-DM3X Operating Instructions Manual

Digital audio monitor with dolby / dolby e™ capability
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Marshall Electronics
Warranty
Marshall Electronics warranties to the first consumer that this AR-DM3X-X Audio Monitor will, under normal use, be free
from defects in workmanship and materials, when received in its original container, for a period of one year from the
purchase date. This warranty is extended to the first consumer only, and proof of purchase is necessary to honor the
warranty. If there is no proof of purchase provided with a warranty claim, Marshall Electronics reserves the right not to
honor the warranty set forth above. Therefore, labor and parts may be charged to the consumer. This warranty does not
AR-DM3X
apply to the product exterior or cosmetics. Misuse, abnormal handling, alterations or modifications in design or
construction void this warranty. No sales personnel of the seller or any other person is authorized to make any warranties
Digital Audio Monitor with Dolby™ / Dolby E™ Capability
other than those described above, or to extend the duration of any warranties on behalf of Marshall Electronics, beyond
the time period described above. Due to constant effort to improve products and product features, specifications may
change without notice.

Operating Instructions

Marshall Electronics, Inc.
1910 East Maple Ave.
El Segundo, CA 90245
Tel: (800) 800-6608 / (310) 333-0606 • Fax: 310-333-0688
www.LCDRacks.com
•
sales@lcdracks.com
24

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Summary of Contents for Marshall Electronics AR-DM3X

  • Page 1: Operating Instructions

    This warranty is extended to the first consumer only, and proof of purchase is necessary to honor the warranty. If there is no proof of purchase provided with a warranty claim, Marshall Electronics reserves the right not to honor the warranty set forth above.
  • Page 2 Specifications (continued) Intentionally Left Blank Input / Output Modules ■ ARDM-HDSDI Input Module Inputs: 1 x SDI (75Ω BNC) – 16 channels embedded audio Outputs: 1 x SDI Equalized Loop-Through (75Ω BNC) SDI Formats: 525i, 625i, 720p, 1080i, 1080p SDI Standards: SMPTE 259M, 292M, 274M, 296M, 260M Audio Coding: PCM, DOLBY E, DOLBY DIGITAL (AC-3)
  • Page 3 Specifications Intentionally Left Blank AR-DM3X-X Audio Monitor ■ METERS Peak Acoustic Output: 104dB SPL Headphone Power Output: 150 mW AR-DM21-B ■ ELECTRICAL Meter Type: 16 x 10 Segment LED Bar Graph Meter Dynamics: Simultaneous VU & PPM (True Peak) AR-DM21-B...

  • Page 4: Table Of Contents

    Warranty....................................24 7. To remove the module, push aside the metal brackets on each side of the slot so that the module is release upward. 8. Close the AR-DM3X-X Audio Monitor by re-fastening the 14 screws on the top panel.

  • Page 5: Product Overview

    Opening the AR-DM3X-X Audio Monitor without proper anti-static precaution may void the warranty. For further flexibility – up to four I/O modules can be installed in a single AR-DM3X-X audio monitor, each module with up to 16 information, contact Marshall Electronics.

  • Page 6: Installation And Initial Setup

    2. Remove the blank cover if present over the empty slot using a Philips screwdriver with appropriate head size. * AR-DM3X-X series monitors may be pre-configured with input/output modules or DOLBY module if ordered as such. DOLBY module installation is indicated by a label on the exterior of the unit.

  • Page 7: Quick Start Guide

    Quick Start Guide Output Modules Install an Input Module Ensure at least one input module is installed in the AR-DM3X-X audio monitor. If no modules are installed, see Module Installation for detailed instructions. Connect an Audio Source Connect an audio source to the audio monitor. Depending on the chosen input module, the signal could be SDI video with embedded audio, AES/EBU digital audio, analog audio, etc.

  • Page 8: Front Panel Features

    Front Panel Features Optional Modules Input Modules ■ ARDM-AES-BNC ■ ARDM-HDSDI Features: Features: • 4 Unbalanced AES/EBU Inputs (8 Audio Channel Inputs) • HD-SDI Input (16 Audio Channel Inputs) • 4 Passive Loop-Through Outputs (8 Audio Channel Outputs) • Re-Clocked HD-SDI Loop-Through Output •...

  • Page 9: Rear Panel Features

    Supplies with 4-Pin XLR connectors providing 24 VDC. USB Port The USB port is used to upgrade firmware to the AR-DM3X-X audio monitor. Additionally, the USB port can be used to configure LKFS settings with USB memory stick. Contact Marshall Electronics regarding available firmware upgrades and instructions.

  • Page 10: Basic Operation

    ■ Introduction Basic operation of the AR-DM3X-X Audio Monitor involves selecting an input module as the audio source, using the LED presence indicators to monitor signal presence, or using the LED bar graphs to display signal levels, and choosing a Beginning in December 2012, the CALM Act requires TV stations, cable and satellite TV operators in the U.S.

  • Page 11: Audio Monitoring

    DOLBY Decoding (continued) Note: If a channel pair contains a DOLBY encoded signal, the corresponding LED bar graphs will not show a signal level. DOLBY signal presence is indicated by the illumination of the blue LED below each channel pair. See the DOLBY Encoded Signals section on page 13 for more information.

  • Page 12: Headphone Output Ad Audio Adjustments

    The ARDM-552 DOLBY Module must be installed in the AR-DM3X-X audio monitor in order to decode DOLBY signals from any input module. If this module is not present, the AR-DM3X-X will indicate DOLBY signal presence with the aforementioned blue LED, but will not be able to decode the bitstream into discrete channels.

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