© 2004 Wohler Technologies Inc. ALL rights reserved
10
AMP1-VS and AMP1-VSA
User Manual P/N
821613
, Rev-
B
8
9
10
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Section 2:
Operation
(Continued)
Phase Indication LEDs
These three LEDs indicate the instantaneous and average phase (polarity) conditions between the source(s) assigned to the
left speaker channel and the source(s) assigned to the right speaker channel. The larger LED labeled
AVG
indicates the
average
phase condition between the left and right speaker channels. The two smaller LEDs labeled
FAST
indicate the
instantaneous
phase relationships. 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.
Bargraph Brightness Trim Pot
This control is recessed into the front panel and can be accessed using a small screwdriver. Turning it clockwise will
increase the relative brightness of all bargraph display LED segments. Adjusting this one control will simultaneously
affect the brightness of all bargraph displays on the front panel.
SDI Signal Error Indication LEDs
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.
Balance Control Pot
This adjusts the volume balance between the left and right speakers or headphones.
Front Panel Features
