Dolby Labs DM100 Bitstream Analyzer

Dolby Labs DM100 Bitstream Analyzer

3.8/5 rating (4 votes)

The Dolby DM100 is a portable, handheld diagnostic tool that can monitor and generate Dolby Digital, Dolby E, and PCM bitstreams.

The DM100 Dolby® Bitstream Analyzer is a uniquely efficient tool for end-to-end system testing. With its built-in test-signal generator, the DM100 allows audio system integrators and service engineers to quickly monitor and check the integrity and composition of Dolby Digital, Dolby E, and PCM signals routed through production, broadcast, cable, and satellite facilities, or even a home theater system.

The DM100 accepts digital input signals via XLR, BNC, and Toslink™ optical connectors. The unit identifies the format of the input signal—Dolby Digital, Dolby E, or PCM—and activates the appropriate built-in decoder. A standard 1/8-inch stereo headphone jack can be switched to monitor any two decoded channels or a downmix of the whole program, while a small built-in speaker provides a mono output.

A preselected set of useful Dolby Digital and Dolby E test bitstreams is stored in internal nonvolatile RAM, and users can change the set in the field via software download from the included CD-ROM. The DM100 can generate the selected bitstream simultaneously on all the output connectors, even while receiving and decoding an input signal. The DM100 is also capable of generating two-channel PCM signals. In this mode, the user can select the output waveform type (white noise, pink noise, sine, square), amplitude, and frequency. A serial port allows software upgrades and error and status logging via a Windows®-based PC.

A pass-through mode permits modification of the input signal’s AES channel status bits before passing the signal to the output connectors. The input signal can still be monitored at the same time. Monitoring capabilities include error detection at the AES3 layer and within the coded audio layers (that is, for Dolby Digital and Dolby E bitstreams), including SMPTE 337 formatting information.

The DM100 is powered by four AA batteries or by an included wall-mounted DC power supply, and it ships with a soft carrying case.

Display and Controls
Two-line, 16-character LCD with control keys for status indication and setup operations

Status LEDs
Indicate critical bitstream and system information

RS-232 Serial Input/Output Port
8-pin female mini-DIN connector for software upgrades and logging functions

Volume Control
Headphone and speaker level

Digital Audio Inputs
AES/EBU 110Ω via XLR female connector
BNC female connector, unbalanced, 75Ω, signal levels per AES-3ID-1995 (SMPTE 276M)
Fiber-optic via Toslink connector
One input active at any time

Digital Audio Outputs
AES/EBU 110Ω via XLR male connector
BNC female connector, unbalanced, 75Ω, signal levels per AES-3ID-1995 (SMPTE 276M)
Fiber-optic via Toslink connector

Video Reference Input
ANTSC/PAL program or black; signal level per SMPTE RP 154-1994; RCA female connector

Headphone Output
+11.5 dBu max into 600Ω, adjustable level
1/8-inch standard headphone jack

Audio Sampling Rates
32, 44.1, and 48 kHz for Dolby Digital and PCM 48 kHz for Dolby E

Video Frame Rates
29.97 or 25 fps

Frequency Response
Digital outputs: 20 Hz to 20 kHz, ±0.25 dB

<0.01% at 1 kHz
<0.02%, 20 Hz to 20 kHz

Dynamic Range
>100 dB

Output Word Length
Up to 24 bits

ABS plastic handheld enclosure

Power Requirements
External 6 VDC, 400 mA power adapter (included), or four AA batteries

Dimensions and Weight
100 × 200 × 41 mm (4 × 7.9 × 1.6 inches)
Net: 0.68 kg (1.5 lb)

Environmental Conditions
Operating: 0°C–50°C (32°F–122°F), natural convection cooling 0%–98% relative humidity (noncondensing)
Nonoperating: 20°C to 70°C (−4°F to 158°F)

Supplied Accessories
Owner’s manual
Warranty card
Carrying case
DC power adapter
RCA-to-BNC and BNC-to-RCA adapters
CD-ROM of Dolby Digital and Dolby E test bitstreams

Regulatory Notices

North America: This unit complies with the limits for a Class A digital device pursuant to Part 15 of the FCC rules and Industry Canada ICES-003 Class A requirements. The 110 V power transformer is UL Listed.
Europe: This unit is designed to comply with the requirements of EMC Directive 89/336/EEC and carries the CE marking accordingly.

One-year limited, parts and labor; see disclaimer.
Specifications subject to change without notice.

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. There are no other express or implied warranties and no warranty of merchantability or fitness for a particular purpose, or of noninfringement of third-party rights (including, but not limited to, copyright and patent rights).

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 or accused infringing devices, 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), cost of defense, 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.


MAP: $2,200

McCalley AudioCall McCalley Audio: (952) 938-7777

Fax McCalley Audio: (952) 938-0096