Metric Halo +DSP, Руководство пользователя

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2882 Users Guide
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• Phantom power — Indicates that at least one of the preamps has the phantom power enabled.
• FireWire — Indicates that the 2882 has been successfully connected to a FireWire bus and has detected
the isochronous cycle required to transmit and receive audio.
• Locked — Indicates that the system clock recovery circuit is properly locked to the selected clock source.
If this light is not illuminated, the 2882 will not be locked to a clock and will revert to its failsafe internal
clock source. Even if the Locked light is not illuminated, the actual sample rate will still be indicated
on the front panel display.
• Digital I/O Section:
• The AES and S/PDIF lights are mutually exclusive and indicate which of the the two input ports are
feeding the Stereo Digital input of 2882. The Locked light indicates when the digital receiver is locked
to the incoming digital audio signal.
The Mobile I/O front panel also provides access to the Headphone output and some associated controls. The
headphone output jack is a TRS 1/4” jack that provides the Left Channel on the tip, the Right Channel on the
ring and the ground return for the two channels on the sleeve. These signals are all ground referred, so they
may also be split and fed single-ended (unbalanced) to an external audio device.
The 2882 headphone output is suited to a wide range of impedances. Headphones with lower impedance
would be expected to get louder than those with higher impedance.
The Mute and Dim buttons provide instant access to simple level control for the headphone output. The Mute
button provides a quick, tactile “panic switch” which mutes the front panel headphone outputs in case of ac-
cidental feedback loops and other audio unpleasantries. The Dim button attenuates the front panel headphone
output by 18 dB.
2882 Rear Panel
Figure 5.9: 2882 Rear Panel
The Mobile I/O rear panel features:
• 4 channels balanced XLR inputs. Each input has:
• 24-bit 96kHz A/D converters (110dB SNR)
• remote controllable pre-amps with 40 dB of gain
• remote switchable input impedance characteristics
• remote switchable 20dB pad
• remote switchable 48v Phantom power, with 10mA current limit
• 4 channels balanced TRS inputs. Each input has:
• 24-bit 96kHz A/D converters (110dB SNR)
• remote controllable pre-amps with 40 dB of gain
• remote switchable input impedance characteristics
• remote switchable 20dB pad
• remote switchable 48v Phantom power, with 10mA current limit
• 8 channels balanced TRS outputs. Each output has:
• 24-bit 96kHz D/A converters (120dB SNR)
• remote controllable output gain (from -12dBV up)
• TOSLINK connectors for ADAT Optical or Optical SPDIF I/O
• 8 channels of ADAT® lightpipe input (switchable to Optical SPDIF)