Avid Technology DigiDesign PRE, Руководство пользователя

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Chapter 2: Hardware Overview and Stand-Alone Operation
7
Gain/Param Display
This three-character, seven-segment LED displays
the input gain for the currently selected PRE chan-
nel, or the PRE’s MIDI channel.
This display can also show the current firmware
version of PRE.
To display the firmware version of PRE in the
Gain/Param display:
1
Press Shift once, then release it.
2
Press OSC.
Gain/Param Control
The Gain/Param control can be used to add gain to
the input signal on one or more of the PRE’s eight
channels, or to set the PRE’s MIDI channel.
Changes made with the Gain/Param control appear
in the Gain/Param display.
The gain range for each input (Mic, Line, and In-
strument) is 0 dB to +69 dB, adjustable in incre-
ments of approximately 3 dB (see Table 8 on
page 36).
Peak Meter
These fourteen-segment LEDs indicate input sig-
nal level for any channel that currently has its Se-
lect switch enabled. If multiple channels have their
Select switch enabled, only the left-most channel
will be represented in the Peak Meter display.
The meter is referenced from the clip point of the
amplifier (for example, –22 dB is 22 dB
below the clip point of the amplifier).
Clear Clips Switch
This switch clears Clip indicators on the Peak me-
ter and Signal indicators.
Peak Hold Switch and LEDs
This switch sets the clip hold action of the SIG me-
ters atop each of the 8 channels. Clips are also in-
dicated by a red Clip LED on the Peak Meter. The
amount of time the clip stays lit is determined by
the Peak Hold value, as follows:
Off When lit, the Peak Hold function is off. Clip
LEDs will light during clipping, then clear shortly
after clipping stops. This is the default Peak Hold
value, on power up.
3 sec When lit, Clip LEDs are displayed for three
seconds, then automatically clear, as long as no ad-
ditional peaks occur.

(Infinity Symbol)
When lit, Clip LEDs will stay
lit until the Clear Clips switch is pressed.
To change Peak Hold (time constant) performance:

Press Peak Hold once to change to the next set-
ting, or multiple times to toggle through the
three settings. Peak hold is a global command
which sets clip persistence for all channels.
Source Switch and LEDs
This switch sets the active input source for individ-
ual PRE channels to Mic, Line, or Inst (instru-
ment). The three Source LEDs indicate the active
input.