© 2004 Wohler Technologies Inc. ALL rights reserved
10
AMP2-VS and AMP2-VSA
User Manual P/N
821583
Rev-
A
Section 2:
Operation
(Continued)
Front Panel Features
9
10
11
Phase Indication LEDs
These three LEDs indicate the instantaneous and average phase (polarity) conditions between the channels assigned to the
left and right speaker channels. The two smaller LEDs labeled
FAST
show
instantaneous
phase relationships in the signal.
The larger LED labeled
AVG
will indicate the
average
phase condition. Indication is as follows:
•
The
left
FAST
LED glows (or blinks) GREEN for
in-phase
signals.
•
The
right
FAST
LED glows (or blinks) AMBER for
out-of-phase
signals.
•
The large
AVG
LED indicates the
average
phase condition by glowing GREEN for
in-phase
signals, or RED for
out-of-phase
signals.
In general, observing the
AVG
LED alone is sufficient for proper phase monitoring. While it is normal for stereo signals to
contain some intermittant instantaneous
out-of-phase
and
in-phase
conditions (
FAST
LEDs), a steady RED glow of the
AVG
LED indicates an
out-of-phase
alarm condition.
Balance Control
This control changes the volume balance between the left and right speaker channels. Note that this control attenuates the
signal from the source, so that the left and right
bass
frequencies (summed together and reproduced in the woofer channel)
will respond to balance adjustments in tandem with the left and right speaker channels. See page
14
for more information
concerning the balance control characteristics.
SDI Status LED
This bi-color (GREEN/RED) LED, labeled
SDI
, glows GREEN as long as a valid
SDI
digital datastream is being received.
It glows RED if TSR errors are present in the signal. If there is no
SDI
signal present the LED will be unlit. This LED always
functions whether or not the
SDI
digital signal is selected for monitoring through the unit.
