Tascam FW-1804, Руководство пользователя

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TASCAM FW-1804
7
Parts of the FW-1804
Front Panel
The FW-1804 front panel is conveniently grouped into logical areas.
Input Section
TRIM controls
Analog level controls for the input level of the mic (XLR)
inputs 1 through 4, and line inputs 1 through 8. Their func-
tion is the same regardless of the monitor mode selected.
Note that the best signal-to-noise ratios are achieved by
maximizing the level of analog inputs at the A/D convert-
ers. For the mic and line inputs of the FW-1804, the
TRIM
controls provide the means for optimizing these levels.
OL indicators
The OL indicators light to indicate a signal peaking at
–2.5dBFS or higher by default (this level is adjustable
between 0.0 dBFS and 5.0 dBFS, in 0.5 dB increments,
using the FW-1804's software Control Panel). When one of
these indicators lights, it indicates an overloaded input—
reduce the level of the input to the channel until the indica-
tor goes out.
SIGNAL indicators
The SIGNAL indicators light to indicate the presence of an
audio signal at the corresponding analog input. These indi-
cators light when the signal level is –42 dBFS or higher.
These indicators and the OL indicators indicate signal lev-
els to the eight analog inputs regardless of the monitor
mode selected.
PHANTOM switch
Use this switch to enable phantom power for the micro-
phone jacks.
CAUTION
Microphones should not be connected to or disconnected
from the FW-1804 with phantom power switched on.
Unbalanced dynamic microphones should never be con-
nected to phantom-powered connectors.
GUITAR/LINE switch
Affects LINE IN 8 only. When this is set to GUITAR , the
input impedance then matches that of an electric guitar or
passive bass. For all other instruments, leave this in the
LINE position.
Indicators
ADAT indicator
This indicator lights when a valid clock signal in ADAT
format is received.
D IN indicator
This indicator lights when a valid clock signal in S/PDIF or
TOSLINK format is received.
CLOCK indicator
This indicator lights when the internal clock is locked to the
selected sampling frequency.
FireWire indicator
This indicator lights when a valid IEEE 1394 (FireWire)
connection is made between the FW-1804 and the host
computer.
MIDI IN and OUT indicators
These light momentarily when MIDI activity is detected on
the appropriate port(s). These indicators function independ-
ently of the monitor mode.