5
User’s Guide
MDM
. The
DMTi
can be interfaced with a Modular Digital Multitrack tape deck
using either of two options:
The ADAT option
, for use with Alesis, Fostex, and Panasonic decks, uses an
optical connnector for audio and a DB-9 connector for synchronization. The
pair labelled
In
is for signals from an ADAT. (Be careful not to connect the
ADAT option’s optical connectors with an
AES
or S/PDIF optical input or
output—you won’t damage anything, but the formats are not compatible.)
It is possible to use just the optical cable when connecting an ADAT to the
DMTi
, but it is not advised—using the sync cable is an easy way to avoid
potential synchronization problems, and it can’t do any harm. Some other
devices that use the ADAT interface, such as mixers, do not use the sync
cable.
The DA-88 (or “TDIF-1”) option,
for use with TASCAM and Sony decks, uses
a single 25-pin connector which handles both input and output signals.
Word clock
. This input accepts sample-rate or word clock from an external
source such as a digital audio system (with separate word clock signal) or a
synchronizer. The word clock signal is a square wave, with a frequency of
between 38 kHz and 53 kHz, at a nominal level of 5 volts peak-to-peak
(minimum 200 mV). The signal is carried on 75
Ω
unbalanced coaxial cable,
terminated with a BNC connector.
Outputs
AES1
,
AES2
,
AES3
,
and
AES4
.
These four outputs each carry a stereo signal.
Like the
AES
inputs, these are the “professional” type of AES/EBU
connectors, using XLR connectors, and they can also be used to drive
“Consumer”-type AES/EBU or Sony/Philips Digital Interface Format
(S/PDIF) inputs on other devices, with proper external adapters (see Page
10).
The
AES1
output is also sent to an optical connector, for use with
compatible AES or S/PDIF devices.
Output switches on the front panel determine whether the output signals
are in “Pro” or “Consumer” format. The difference involves certain channel
status information. (There are also differences in level and impedance, but
this switch does not deal with them.) One switch controls output
1
, while
the other controls outputs
2
,
3
, and
4
.