ATI Audio DP100 User Manual

Page 3

audio.com

The DP100 and MM100 are level and impedance matching interfaces for semi-pro,
industrial and consumer audio equipment operating into professional balanced 600-ohm
systems.

The DP100 is a uni-directional stereo interface for Playback Only applications. It is
designed specifically to convert the unbalanced RCA outputs of Digital Compact Disc
Players to transformer balanced and isolated XLR 600-ohm line levels with no
compromise or degradation of the superb performance available from the digital audio
source. The DP100 is equally at home on a newsroom desk to interconnect field ENG
cassette recorders into broadcast systems for dubbing.

The MM100 is a bi-directional interface which bridges a stereo pair of 600 ohm balanced
or unbalanced, +4dBm lines and converts those signals to a nominal .25 Volt (-10dBu)
level to feed, for example, the record inputs of a consumer cassette or reel-to-reel tape
recorder. Simultaneously the MM100 also converts the unbalanced, stereo, .25 Volt
playback outputs from tape deck to a transformer balanced, floating +4dBm, 600-ohm
professional line level. The MM100 RCA connectors may also be jumpered for use as a
two channel 600 ohm Line Amplifier, a two output Distribution Amplifier or a Mono
Summing Amplifier.

The MM100 and DP100 are identically packaged in a rugged, compact steel enclosure.
All controls and connectors are recessed for protection and their identification markings
are printed on the protected reverse side of a heavy-duty polycarbonate overlay. All
power supply components are internal and are well shielded by the steel wrap-around.
Keyhole slot mounting angles are supplied with the unit to assure secure mounting to
shelves and desks. An accessory rack panel mounts one or two units side-by-side in a
single 1-3/4 inch rack space.

INSTALLATION

MOUNTING

Your ATI interface can also be rack mounted either singly or in pairs in only 1-3/4 inches
by using Accessory Front Panel Kit, P/N 20273-501. Each interface mounts to panel
with precisely three #8 x 3/16” screws. Why precisely three screws? We calculated that
two screws would really be enough to hold firmly and three screws would survive a
major earthquake, therefore using four screws would definitely be gross over design and
not justified. (Actually, the fourth screw was right in line to spear an output transformer.)

GROUNDING

We have taken heroic measures to keep RF out of your Interface. This heroism includes
output transformers, split and bypassed input and output resistor networks, beaded,
bypassed and isolated power inputs, non-concentric wound power transformers, double
ground plane PC boards and a well shielded enclosure which will also keep rain and

This manual is related to the following products:

MM100