Dolby Laboratories DM100 User manual

DM100 User’s Manual
i
Dolby Laboratories, Inc.
Corporate Headquarters
Dolby Laboratories, Inc.
100 Potrero Avenue
San Francisco, CA 94103-4813
Telephone [phone]
Facsimile 415-863-1373
www.dolby.com
European Headquarters
Dolby Laboratories
Wootton Bassett
Wiltshire, SN4 8QJ, England
Telephone [phone]
Facsimile (44) 1793-842101
DISCLAIMER OF WARRANTIES: Equipment manufactured by Dolby Laboratories is
warranted against defects in materials and workmanship for a period of one year from the date
of purchase. All warranties, conditions, or other terms implied by statute are excluded to the
fullest extent allowed by law.
LIMITATION OF LIABILITY: It is understood and agreed that Dolby Laboratories’
liability whether in contract, in tort, under any warranty, in negligence or otherwise shall not
exceed the cost of repair or replacement of the defective components and under no
circumstances shall Dolby Laboratories be liable for incidental, special, direct, indirect, or
consequential damages (including but not limited to damage to software or recorded audio or
visual material), or loss of use, revenue, or profit even if Dolby Laboratories or its agents have
been advised, orally or in writing, of the possibility of such damages.
Dolby, the double-D symbol, AC-3, and Surround EX are trademarks of Dolby Laboratories. Toslink
is a trademark of Toshiba Corporation. Windows is a trademark of Microsoft Corporation.
2000 Dolby Laboratories Inc; all rights reserved. Issue 1
Part No. 91751
S00/13416

DM100 User’s Manual
ii
Table of Contents
Note: References to the front-panel buttons are shown using brackets
throughout this manual (e.g., “[STATUS]”). References to multiple button
combinations means sequences, not simultaneous button presses. Press the
first button, release, and press the next button.
Chapter 1 Introduction
1.1 About the DM100..................................................... 1-1
Chapter 2 Getting Started
2.1 Power........................................................................ 2-1
Battery Installation........................................ 2-1
[Power] Button.............................................. 2-2
Battery Low LED.......................................... 2-2
Auto-Power Off ............................................ 2-2
External DC Power Supply........................... 2-3
2.2 Rear Belt Clip/Stand................................................. 2-3
2.3 Inputs........................................................................ 2-4
Dolby Digital ................................................ 2-4
Dolby E......................................................... 2-4
PCM.............................................................. 2-4
Other ............................................................. 2-4
Video............................................................. 2-4
2.4 Outputs..................................................................... 2-5
Headphone Output........................................ 2-5
Speaker Output ............................................. 2-5
2.5 Hookup..................................................................... 2-6
2.6 Quick Start ............................................................... 2-7
Making Your First Reading.......................... 2-7
Generating a Bitstream ................................. 2-7

DM100 User’s Manual
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Chapter 3 Operation: Status Mode
3.1 Main Status Screen...................................................3-1
Dolby E.........................................................3-2
Dolby Digital ................................................3-3
PCM..............................................................3-4
3.2 The Status Menus..................................................... 3-5
3.2.1 Dolby E Metadata Input Menu......................3-6
Px Prog Desc.................................................3-7
Px Dialogue Lev............................................3-7
Px Channel Mode.......................................... 3-8
Px LFE Channel............................................3-8
Px Bitstrm Mode...........................................3-8
Px Line Mode Pro......................................... 3-9
Px RF Mode Pro............................................ 3-9
Px RF Ov Protect .......................................... 3-9
Px Center Dwnmx.........................................3-10
Px Srnd Dwnmx............................................ 3-10
Px Dolby Srnd...............................................3-10
Px Mixing Level............................................3-11
Px Room Type ..............................................3-11
Px Copyright .................................................3-11
Px Orig Bitstrm.............................................3-11
Px Extnd Bitstrm........................................... 3-12
Px DC Filter..................................................3-13
Px Lowpass Filt.............................................3-13
Px LFE Filter................................................. 3-13
Px Srnd 3dB Attn..........................................3-13
Px Srnd Ph Shift............................................3-13
Px Begin Gain............................................... 3-13
Px End Gain..................................................3-13

DM100 User’s Manual
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3.2.2 Dolby Digital Metadata Input Menu............. 3-14
DD Dialogue Lev.......................................... 3-15
DD Channel Mode........................................ 3-15
DD LFE Channel.......................................... 3-15
DD Data Rate................................................ 3-16
DD Bitstrm Mode ......................................... 3-16
DD Line Mode Pro ....................................... 3-17
DD RF Mode Pro.......................................... 3-17
DD Center Dwnmx....................................... 3-17
DD Srnd Dwnmx.......................................... 3-18
DD Dolby Srnd............................................. 3-18
DD Mixing Level.......................................... 3-18
DD Room Type............................................. 3-19
DD Copyright ............................................... 3-19
DD Orig Bitstrm ........................................... 3-19
DD Extnd Bitstrm......................................... 3-20
DD Dual Mono MD...................................... 3-21
DD Format.................................................... 3-22
DD Sample Rate ........................................... 3-22
DD Bitstream ID........................................... 3-22
DD Stream # ................................................. 3-23
3.2.3 AES3 Status Menu........................................ 3-24
3.2.4 Input Level Menu.......................................... 3-25
3.2.5 Generator Status Display .............................. 3-26
3.2.6 Video Reference Status Display................... 3-26
3.2.7 Timecode Status Display .............................. 3-27
3.2.8 Error Statistics Menu .................................... 3-28
3.2.9 DM100 Firmware Version............................ 3-28

DM100 User’s Manual
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Chapter 4 Operation: Setup Mode
The Setup Menus..............................................................4-1
4.1 Monitor Control........................................................4-2
4.2 Gen Control..............................................................4-4
4.3 AES3 Output ............................................................4-6
4.4 User Presets..............................................................4-7
4.5 I/O Control ...............................................................4-8
4.6 System Settings ........................................................4-9
Chapter 5 Reference Information
5.1 Data Transfer............................................................5-1
Test Bitstream Loading................................. 5-1
Data Logging.................................................5-1
Firmware Upgrade ........................................5-2
Data Transfer Error Messages: .....................5-2
5.2 Unit Reset................................................................. 5-3
Restore Default Settings................................5-3
Hardware Reset............................................. 5-3
5.3 Connector Pinout Information.................................. 5-4
RS-232 Serial Port....................................................5-4
5.3.2 XLR Connectors ...........................................5-4
5.3.3 Headphone Connector...................................5-4
5.4 DM100 Specifications..............................................5-5
5.5 System Block Diagram............................................. 5-5

DM100 User’s Manual
1-1
Chapter 1
Introduction
1.1 About the DM100
The Dolby DM100 is a hand-held diagnostic tool that can
monitor or generate Dolby Digital, Dolby E, and PCM
bitstreams. The unit allows audio systems integrators and service
engineers to quickly test the integrity and composition of these
signals throughout a facility. The DM100 is intended for use in
broadcast, cable, DBS, and post-production facilities, as well as
DVD mastering and home theater installation.
The DM100 accepts input signals via XLR, BNC, and Toslink™
connectors. The unit identifies the format of the input signal and
activates the appropriate built-in decoder. The decoded analog
signal, sent to a standard 1/8-inch stereo headphone jack, can be
switched to monitor any two decoded channels, while a small
built-in speaker can monitor the sum of any channel pair. A
front-panel LCD displays Dolby Digital and Dolby E metadata
information. Six front-panel LEDs indicate critical bitstream and
system status information.
A set of Dolby Digital, Dolby E, and PCM test bitstreams is
stored in internal, nonvolatile RAM, and can be changed in the
field via software download. The selected test bitstream is
produced simultaneously on all output connectors. The unit can
receive and decode an input signal while generating a test
bitstream. The DM100 also features a pass-through mode that
allows modification of the input signal’s AES channel status bits
before passing the signal to the output connectors. (The input
signal can be monitored simultaneously.)

DM100 User’s Manual
2-1
Chapter 2
Getting Started
2.1 Power
The DM100 is powered by four standard AA 1.5 V batteries or
from an external 6V, 800 mA DC power supply via the power
input connector. The internal batteries are disconnected when
the external DC power supply is used.
Battery Installation
Push the cover as
shown, and slide
out.
Insert four AA
batteries with
alternating positive
terminals, and
replace the cover.

DM100 User’s Manual Getting Started
2-2
Dead Battery…
[Power] Button
To turn on the DM100, press and hold the [Power] button down
for two seconds. The display reads as shown for approximately
one second while a self-test diagnostic runs.
The power-on process ends with the DM100 operating in the
last-used state. If the diagnostic test fails, the Error LED lights
and an error message is displayed.
To turn off the DM100, press [Power] again. The display reads
“Power Off,”and the unit shuts off.
Battery Low LED
The front-panel battery LED flashes when the
battery voltage drops below 4.3 V. If the
battery voltage drops below 4.1 V, the
DM100 display reads “Dead Battery”and the
unit shuts off.
Auto-Power Off
When the DM100 is powered from the batteries (external power
supply not connected), the unit can be set to turn itself off after a
selectable number of minutes with no user activity (5, 10, 15, or
30 minutes). This feature can be disabled. The factory default
setting is 15 minutes.
The wait time is set from the Setup menu under System Settings,
Power Management. See section 4.6.
Model DM100
Unit Name
Power Off…