ATI DM200 User Manual
DM200
DIGITAL AUDIO MONITOR
OPERATION AND MAINTENANCE MANUAL
© Copyright 1997-2005, Audio Technologies Incorporated - Printed in USA
Audio Technologies Inc. | 154 Cooper Road #902 | West Berlin, NJ 08091 | Voice 856-719-9900 | Fax 856-719-9903 | www.
audio.com
DESCRIPTION
The DM200 monitors AES/EBU, IEC958 and S/PDIF formatted digital audio lines. It provides a 24
bit, 27 to 96KHz D/A converter feeding a high quality stereo headphone amplifier for audible
monitoring and quality assessment. The DM200 also includes a balanced 600 ohm stereo line level
output to drive external power amplifiers, console inputs, etc.
The DM200 allows you to meter digital headroom (down from 0dBFS) to warn of possible
overdrive at the signal source. The balanced audio line output is also metered with a conventional
reference level of +4dBm at 0dB on its meter scale.
The DM200 can be used freestanding, desk mounted or rack mounted with other NanoAmps up to
three across in one rack unit (1 %4"). Optional field cases, protection plates and battery power
packs are available (see Field Accessories).
PERFORMANCE
The DM200 provides dynamic range in excess of 90dB (IEC-A weighted) and THD below .01 %
measured at the analog line outputs for all but the lowest sampling rate of 32kHz. All measurements
are noise limited at -90dB (20Hz to 20kHz bandwidth). Response is +/ -.25dB, 20 to 20kHz, at all
but the lowest sampling rate.
INPUTS
The DM200 accepts AESIEBU and SP/DIF digital audio signals from either an XLR female 110ohm line or a BNCIRCA 75 ohm line as selected by the front panel INPUT switch. Inputs from .10
to 1OVp-p are properly detected. The selected digital input is transformer isolated, floating and DC
blocked to eliminate ground loop hum and jitter. All inputs are properly terminated for minimum
signal reflection when the rear panel INPUT termination switch is activated.
The XLR female digital input loops-through to an XLR male output connector. BNCIRCA inputs
also simultaneously loop-through to the BNC/RCA outputs. Opening the rear panel termination
switch allows the DM200 to bridge loop-through digital lines without loading. The last device
should always terminate the line.
Audio Technologies Inc. | 154 Cooper Road #902 | West Berlin, NJ 08091 | Voice 856-719-9900 | Fax 856-719-9903 | www.
audio.com
Loading...