Metric Halo Mobile I/O - Manual (Page 73)

ULN-2 Users Guide
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These buttons are labeled with up and down arrows. The currently selected snapshot is indicated by the column
of LED’s labeled C, 1, 2, 3, 4, 5, 6, 7, 8, 9. When the ULN-2 turns on, the “C” indicator will be illuminated,
indicating that the unit has booted up with the state that was stored in the “Boot Snapshot”.
Figure 6.9: ULN-2 Front Panel Snapshot Controls
Pressing the up arrow will move to the next higher snapshot in the list (e.g. if you are currently on snapshot 3,
you will move to snapshot 2). Conversely, pressing the down arrow will move to the next lower snapshot in
the list (e.g. if you are currently on snapshot 3, you will move to snapshot 4). If you are at either beginning of
the list and you press the up arrow, you will wrap around to the last item in the list. When you select a new
snapshot, the new snapshot is applied to the box immediately.
Please see the Bootstates and Snapshots section of this manual for information on saving your information
into the ULN-2.
The ULN-2 front panel provides access to the level control knobs for headphones and for the monitor outs. The
headphone output jack is on the front panel and the monitor output jacks are located on the back of the unit.
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. The ULN-8 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 Monitor output jacks are balanced TRS connectors.
ULN-2 Rear Panel
Figure 6.10: ULN-2 Rear Panel
The ULN-2 rear panel features:
• 2 channels balanced MIC/LINE/INSTRUMENT inputs on Neutrik™ Combo connectors. Each input has:
• 24-bit 96kHz A/D converters (110dB SNR)
• high gain, low noise Mic amps with up to 72 dB of gain (fed by the XLR connector)
• high gain, low noise DI amps with up to 63 dB of gain (fed by the TRS connector)
• switchable input impedance characteristics (Mic input 3.3k Ohms, DI input 200k Ohms)
• switchable 48V Phantom power (on XLR connector)
• balanced analog inserts (S1, S2, R1, R2 jacks) which are post preamp but pre A/D. You can use the
inserts to patch in analog processing between the preamp and the A/D converter. The send jack can
also be used to send a mult of the input signal to another device while still using the A/D section of
the ULN-2. This allows the ULN-2 to be used as an active mic splitter.
• 2 channels balanced TRS main outputs. Each output has:
• 24-bit 96kHz D/A converters (120dB SNR)