DigiDesign 1622 1 Manual de instalación - Página 8
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Imprimir página1622 I/O Back Panel
The 1622 I/O has the following back panel
connectors, moving from left to right:
Back panel of the Digidesign 1622 I/O
1. Analog Audio Inputs 1–14
These are balanced, 1/4-inch TRS jacks for
analog audio input connections.
Inputs can be individually calibrated from
+4 dBu to –10 dBV line levels and higher
in 2 dB gain steps, using the Other Options
dialog (Setups > Hardware > Other Op-
tions). This allows the 1622 I/O to accom-
modate any standard, line-level input, in-
cluding synthesizers, samplers and effects
devices. Unbalanced connections are sup-
ported through the use of standard
1/4-inch TRS mono phone plugs.
Because input channels 1–2 of the
1622 I/O are software-selectable between
analog or S/PDIF digital format, input to
these two analog channels is disabled
when S/PDIF digital input format is chosen
in the Pro Tools Hardware Setup dialog.
2. Analog Audio Outputs L-R
These are balanced, 1/4-inch TRS jacks for
analog audio output connections. They
carry Pro Tools main output channels 1–2.
The 1622 I/O analog outputs feature 24-bit
digital-to-analog converters. Both output
channels are continuously active. Output
operating levels are switchable between
4
1622 I/O
+4 dBu and –10 dBV operation using the
Other Options button in the Pro Tools
Hardware Setup dialog.
Unbalanced connections are supported
through the use of standard 1/4-inch TRS
mono phone plugs. The 1622 I/O is factory
calibrated at +14 dBu headroom, yielding a
maximum output level of +18 dBu when
in +4 dBu operating mode. When set to
–10 dBV operating mode, maximum out-
put level is +4 dBV.
3. Slave Clock In/Out
The Slave Clock Out jack is a standard BNC
type connector that outputs a 256x audio
sample rate master Super Clock signal for
slaving and synchronizing multiple
Digidesign Interfaces and synchronization
peripherals together.
When the 1622 I/O Sync Mode is set to In-
ternal, connecting a valid Slave Clock sig-
nal to the Slave Clock In port will cause the
1622 I/O to automatically switch to Slave
mode. When the 1622 I/O is the master in-
terface or the first interface in a chain, Dig-
ital sync mode overrides the Slave Clock
input, and an incoming Slave Clock Out
signal will not switch the 1622 I/O to Slave
mode.
Because crucial timing data is passed over
these ports, you should use high-quality,
75-ohm RG-59 cables for making connec-
tions, and keep total cable length to less
than 3 meters between interfaces.
4. S/PDIF Digital Input/Output
The Sony Phillips Digital Interface Format
(S/PDIF) is used in many professional and
consumer CD players and DAT recorders.