Metric Halo Mobile I/O - Manual (Page 117)

ULN/LIO-8 Front Panel Guide
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rest of the box, but just that the AES signal is being properly decoded and (a) could be used as a valid clock
source and (b) will provide valid audio if the the input is running at the same rate as the rest of the box.
The AES Clock source indicator is illuminated when the corresponding input port has been selected as the
clock reference for external AES clock. At most one of the 4 AES Clock source indicators will be illuminated.
If the box’s clock source is not set to AES, then none of these indicators will be illuminated.
Monitor Control Section
The Front Panel provides a Monitor Control Section that allows you to control both the dedicated headphone
monitor level and the monitor level of the outputs assigned to the monitor controller. You switch between the
headphones and the monitor controller by pressing the monitor control knob (activating the integrated switch).
The currently selected path is indicated by the currently illuminated LED under the monitor control knob.
Figure 9.14: Monitor Control Knob
In addition to the Monitor Control knob, there are two tact switches above the Monitor Control knob — Mute
and Dim. These two buttons function as toggle switches and apply to the currently selected monitor path.
When the MUTE is engaged, the selected path indicator turns Red and the output is muted. When the DIM is
engaged, the selected path indicated turns yellow, and the output level is turned down by 20 dB. Both MUTE
and DIM can be engaged at the same time, and the MUTE mode will dominate.
The Front Panel includes a dedicated headphone output with its own discrete DAC, headphone amp and
analog domain volume control. The monitor control knob controls the Volume Control for this output when
the monitor control mode is set to Cans.
Figure 9.15: Cans Jack
Front Panel DI Inputs
The Front Panel provides two Ultra-Hi-Z DI inputs that are summed into the Channel 1 and Channel 2 line
input paths. The DI inputs have programmable gains that are configured via jumpers (this requires opening the
box). The signals applied at the DI will appear on the corresponding line inputs mixed with any signal present
at the line input on the back panel. If you do not want this mixing, you should ensure that only one connector