Metric Halo 2882 operating guide - Manual (Page 17)

Mobile I/O User’s Guide
9
• FireWire
• Indicates that the Mobile I/O 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 Mobile I/O 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 Mobile I/O. 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 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 acciden-
tal feedback loops and other audio unpleasantries. The Dim button attenu-
ates the front panel headphone output by 18 dB.