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10.4 av integration (unity gain)
The NAC 282 unity gain function enables an audio-visual
processor to be integrated such that the processor’s
volume control takes over command of signals connected
to selected NAC 282 inputs. Unity gain can be selected
only on the AV input.
To select unity gain, first switch the NAC 282 into program
mode as previously described. The front panel
source mute
button will illuminate if unity gain is selected. If it is not
enabled it can be switched on by pressing the
source mute
button twice. Deselect unity gain by again pressing the
source mute
button.
Unity gain options only become operational on exiting from
program mode by pressing and holding the handset
prog
key.
Note:
The unity gain feature must be used with care. It
effectively by-passes the NAC 282 volume and balance
controls leaving any signal connected to a unity gain input
to be passed to the power amplifier and speakers at full
volume. Additionally, if the AV input is selected while unity
gain is enabled the volume and balance handset functions
will be disabled and their indicators will turn off. This will be
flagged by the volume or balance indicators flashing if
either handset function is operated.
10.5 volume and balance control
The remote handset
volume
and
balance
keys provide
some alternative control characteristics. A quick press and
release of a key will adjust by a preset “nudge”. A quick
press and release of a key followed by press and hold will
cause continual slow adjustment. Simple press and hold
will cause continual fast adjustment.
10.6 mute and mono
Mute and mono functions can be controlled independently
for source and record signals via the buttons to the left of
the two banks of source and record selection buttons.
Mute
silences the output signal, while
mono
sums the left
and right channels.
10.7 display
The NAC 282 front panel button display can be switched off
by pressing the remote handset (in preamplifier mode)
disp
function. Any subsequent handset or front panel operation
will temporarily restore the display. A second operation of
the
disp
function will permanently restore the display.
10.8 switch-on
After switch-on, via the NAPSC and power supply, or power
amplifier,
power
button, the NAC 282 will remain muted for
30 seconds while control systems and circuits stabilise.
The source side will then un-mute automatically leaving the
record side muted (and its circuits unpowered).
Note:
A flashing mute indicator after switch-on indicates
that the preamplfier power supply or link plugs are
incorrectly connected.
10.9 remote control
The NARCOM 3 remote handset supplied with the NAC 282
duplicates all configuration options. See Section 17 for
more information. The Flash handset will also control the
NAC 282. See Section 16 for more information.
10.10 defaults
To restore all programmable settings to the factory defaults
press and hold the remote handset
disp
key while the
preamplifier is in program mode. The preamplifier will exit
from program mode following this operation.
NAC 282
