I N S T A L L I N G T H E 4 P R E H A R D W A R E
23
The 4pre on-board mixer also supplies 12dB of
digital trim adjustment for the S/PDIF input pair,
which can be adjusted from CueMix FX (“Input
trim” on page 53).
CONNECT AND SYNC S/PDIF DEVICES
DAT decks and other devices with S/PDIF digital
I/O will sync to the 4pre via the S/PDIF connection
itself. Just connect it to the 4pre via the S/PDIF
connectors. When the device records a digital
audio signal (from the 4pre), it will simply
synchronize to the clock provided by the digital
audio input from the 4pre.
When recording digital audio into your host audio
software via the 4pre’s S/PDIF input, you can either
resolve the external device to the 4pre, as described
above, or you can resolve the 4pre to its S/PDIF
input.
Figure 4-2: The setup for synchronizing a S/PDIF device with the 4pre.
Sync is achieved via the digital I/O connection itself. In this case, you
have to choose S/PDIF as the 4pre’s clock source when resolving it to
the other device.
POWER OPTIONS
The 4pre can draw power from two possible
sources:
1. the computer via FireWire, or
2. a DC power supply.
If you use USB to connect to your computer, you
must also use the DC power supply included with
your 4pre.
Bus power requirements
The 4pre draws all the power it needs from the
FireWire bus connection to the computer.
However, the FireWire connection to the computer
must meet all of the requirements discussed below.
9-pin and 6-pin FireWire connectors
The 4pre can only draw power over the FireWire
bus from a 9-pin to 9-pin cable, or a 6-pin to 9-pin
cable. It cannot draw power from a FireWire cable
with a 4-pin connector, as shown below:
Figure 4-3: 4-pin FireWire connectors cannot be used for bus power.
When operating under bus power, daisy-chaining
is not recommended
The 4pre can be daisy-chained with other FireWire
devices from a single FireWire connection to the
computer. However, if the 4pre is operating under
bus power, this is not recommended. If you need to
daisy chain the 4pre with other devices on the same
FireWire bus, power the 4pre with the included
power adapter. The other devices on the chain
should also have their own power supply. In
general, bus-powered FireWire devices should not
be daisy-chained.
FireWire adapter products must be powered
If you are using a FireWire adapter (a third-party
product that supplies one or more FireWire ports
to your computer), it must have direct access to a
power supply:
S/PDIF
S/PDIF device
4pre
4pre
Clock Source setting =
Internal
(when resolving the other
device to the 4pre)
4pre
Clock Source setting =
S/PDIF
(when resolving the 4pre to the
other device)
S/PDIF
6-pin FireWire
4-pin FireWire
✓ ✗
YES
NO
Summary of Contents for 4pre
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Page 5: ...Part1 GettingStarted ...
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Page 16: ...P A C K I N G L I S T A N D S Y S T E M R E Q U I R E M E N T S 16 ...
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Page 29: ...Part2 Usingthe4pre ...
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