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2 - Features of the FireOne
IMPORTANT SAFETY PRECAUTIONS
The controls and connectors of the FireOne are described in
the following sections. Note that the specific functionality of
the control surface buttons may vary with the application that
Top panel
1
2
3
4
7
SIG and OL indicators
1
Each input has indicators located just above its associated
GAIN
control to assist in setting the proper input signal
levels. The
SIG
indicator flashes green to indicate that
an audio signal is present at that input connector. The
indicator flashes red when a signal approaching the
OL
FireOne's clipping level is detected (the signal level that
to flash is -2.5dBFS).
OL
causes
When one of these indicators lights, it indicates an over-
loaded input, and you should reduce the level of the input
to the channel gradually, until the
flashing.
WARNING
If you ignore the OL indicator, peaks in the incoming
signal will be internally clipped at the A/D converter
input, resulting in distortion in the recorded signal!
2
GAIN controls
controls allow the signals at FireOne's input
GAIN
The
jacks to be amplified or attenuated, such that the signal at
the input to the A/D converter can be optimized. Careful
optimization of the signal levels will maximize the
signal-to-noise ratio of the recorded signal, while prevent-
ing distortion due to overload. The signal level indicators
TASCAM FireOne
6 8 9
5
t
y
0
OL
indicator stops
it's being used with. Please refer to the Application Guide
for more details.
r
described below will help you to set the proper levels. In
the section on metering, we'll also describe a way to use
FireOne's stereo meters to help you set the input level
most accurately.
3
PHANTOM switches and indicators
The XLR connectors on the FireOne inputs can be used
to supply phantom power to microphones which require
its use. Each input has an associated
ton switch, and an LED indicator to indicates the status of
+48 V phantom power on the channel.
WARNING
Microphones should not be connected to or discon-
nected from the FireOne with phantom power
switched on. Unbalanced ribbon microphones should
never be connected to phantom-powered connectors.
e
q
w
pushbut-
PHANTOM
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Troubleshooting
