Lexicon PCM 81 - REV User Manual page 18

Selecting a Digital Input Source
1. Press Control.
2. Press Up or Down until the leftmost digit in the lower lefthand corner of the
display is 0.
3. Turn SELECT to 0.0 Word Clock, and turn ADJUST to display Ext: XLR or
Ext: Coax, depending on the input you are using.
Selecting Word Size
1. Press Control.
2. Press Up or Down until the leftmost digit in the lower lefthand corner of the
display is 0.
3. Turn SELECT to 0.3 Word Size, and turn ADJUST to display desired Word
Size.
NOTE: When using analog outputs as primary outputs, set Word Size to 20
bits.
Setting Analog and Digital Input Level
1. Press Control.
2. Press Up or Down until the leftmost digit in the lower lefthand corner of the
display is 0.
3. Turn SELECT to 0.2 Dig In Lvl, and turn ADJUST to display 0%.
NOTE: If you are not running digital audio, controlled by External Clock, into
the PCM 81, the digital audio input will be disabled or muted. Until there is
valid digital audio input, select 0.0 External to enable the digital input level
control. Until valid digital audio is connected, the Dig In Lvl control will remain
muted.
4. Turn SELECT to 0.1 Analog In Lvl, and turn ADJUST to display 100%.
5. Adjust the front panel INPUT knob so that program material level peaks
cause the headroom display to reach the top of the column without lighting
the overload indicators. An occasional large signal peak causing momentary
flashing of the overload indicator is acceptable in most instances, but should
be validated by listening to the actual result.
6. If you are running digital audio, turn SELECT back to 0.2 Dig In Lvl, and turn
ADJUST to the desired level. You may want to back off the Analog In Lvl
setting to prevent the analog/digital mix from overloading the effects proces-
sor.
Setting Output Level
While still in Control mode, turn SELECT to 0.6 Output Level. The Output Level
parameter has two range positions. The appropriate position depends on the
level handling capability of the device connected to the analog outputs. Devices
capable of handling outputs with peak levels of 18dBu require setting Output
Level to the +4dBu setting. Devices which cannot handle peak levels greater
than +4dBu require the -10dBu setting.
Product Overview
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