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E18
Preamplifier Operation
14.3 Handset Volume and Balance
Control
The remote handset volume and balance keys provide some
alternative control characteristics.
With the NAC 552, NAC 252, NAC 282 and NAC 202 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.
With the NAC 152 XS, a short press and release of a key will
adjust by a preset “nudge”, while pressing and holding the key
will result in three seconds of slow adjustment followed by
continual fast adjustment.
Note: The NAC 152 XS does not incorporate any facility for
channel balance control.
14.4 Mute, Mono and Mon
Mute silences the output signal and can be selected by pressing
the front panel mute button. On preamplifiers equipped with
separate source and record sections Mute can be selected
independently for source and record. Mute can also be selected
from the handset.
Some preamplifiers include a mon (mono) function that sums
the left and right channels. Mono can be selected by pressing
the front panel mon (NAC 552 mono) button. On preamplifiers
equipped with separate source and record sections mono can
be selected independently for source and record. Mono can
also be selected from the handset.
Note: The NAC 202 and NAC 152 XS do not incorporate any
mono facility.
The NAC 202 incorporates a mon (“tape monitor”) function.
Pressing the mon button routes the hdd, av or aux 1 input
signals to the preamplifier output while leaving the input
selection routed to the hdd, av and aux 1 outputs. The mon
function can also be selected from the handset.
Note: Only the hdd, av and aux 1 inputs (those that incorporate
outputs) can be selected when mon is engaged. However, if
one of these inputs carries the source signal, that input will be
unavailable for monitoring.
Note: The record mute function on the NAC 552, NAC 252, NAC
282 and NAC 202 is engaged by default. It can be disengaged
on the NAC 202 by pressing the mute button while mon is
engaged. See Section 10.3.
Note: The NAC 152 XS does not incorporate any front panel
monitor facility.
14.5 Display
The preamplifier front panel button illumination 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 restore the display.
14.6 Switching On
After switch-on, via the power amplifier or power supply power
button, the preamplifier will remain muted for 30 seconds while
control systems and circuits stabilise.
14.7 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.
20


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