© 2004 Wohler Technologies Inc. ALL rights reserved
8
AMP2-VS and AMP2-VSA
User Manual P/N
821583
Rev-
A
Please refer to
Figure-2a
on the facing page to familiarize yourself with the front panel features of the
AMP2-VS
and
AMP2-VSA
units. The following sections describe these features and are referenced, by number, to
Figure-2a
.
Front Panel Features
Section 2:
Operation
(Continued)
6
7
8
4
5
1
2
3
Speakers
The
AMP2 Series
monitors feature two mid-range speakers (left and right) and one woofer speaker. Two amplifier/driver
combinations handle midrange and high frequency information in the left and right (stereo) speaker channels, while the third
channel reproduces and sums the left and right channel information below the 500 Hz crossover point in the woofer (bass)
speaker. Note that the woofer channel is NOT a dedicated
LFE
(subwoofer) or
Center
channel. See page
14
for more
information concerning the
AMP2 Series
audio amplifier/speaker configuration.
Audio Level Meter LED Bargraph Displays (1-4)
Audio levels for the four selected source channels are displayed via these four tri-color LED bargraph meters. The four
bargraph meters display audio levels for the digital or analog audio sources selected for monitoring. All bargraph LED
segments are of the tri-color type (GREEN, AMBER, RED) and are user adjustable for
Referrence Level
,
Display Mode
,
Peak Hold
,
PPM Ballistics
,
Alternate Bargraph Scales
, and
Phase Correlation
via DIP switches on the rear panel and
inside the unit. For factory set and user adjustable level meter DIP switch settings, see pages
19
and
20
. For more
information about the
Phase Correlation
feature, see page
22
. For meter specifications, see page
5
.
Headphone Jack
This jack accepts a standard 1/4” phone type stereo headphone plug. Select the headphone audio sources as you would for
the internal speakers. When you plug in headphones, the speakers will mute.
Speaker Assign Channel Buttons (Left and Right)
Use the
left
bank of four buttons to assign one to four of the four available channels for monitoring from the
left
speaker
channel. Use the
right
bank of four buttons to assign one to four of the four available channels for monitoring from the
right
speaker channel. Channel buttons toggle On/Off and will light up BLUE to indicate they are selected.
Operation for channel selection for each bank of four buttons is as follows:
•
Single Channel Select:
Press and
release
a single channel button to select that channel (and
deselect
any
previous selection). Pressing and releasing the selected channel button
again
will deselect it.
•
Multi-Channel Select (Summing):
Press and
hold down
a desired channel button, then press other channel
buttons to add (sum) additional channels (or press any again to deselect). Release
all
buttons to accept the
selection set. When multiple channels are selected, pressing and
holding
an already selected channel button will
allow further modification to the selection set. Releasing
all
buttons accepts the new selection set. Pressing and
immediately
releasing
an already selected channel button will select only it and deselect all other channel selections.
Note that if channels assigned to either the left or right level meters are multi-channel (summed), then the respective
level meter will indicate summed audio levels.
If the user presses a previously selected (lighted) channel button, but then decides not to make any changes to the selection
set, the user should keep the button
depressed
for at least
1.5 seconds
before releasing it
.
This will preserve the current
selection set as though the button was never pushed.
Analog/Digital Source Select Switch
(AMP2-VSDA Only)
This two position toggle switch, featured only on the
AMP2-VSDA
, allows the operator to choose between the two primary
input sources;
ANALOG
or
DIGITAL
. When this toggle switch is set to
ANALOG
, the unit will monitor the
analog
source
as input on the rear panel
ANALOG IN
XLR connectors (
Item G
, page
12
). When this toggle switch is set to
DIGITAL
,
the unit will monitor the
SDI
source as input on the rear panel
SDI IN
connectors (
Item D
, page
12
).
Power LED
This LED glows GREEN to indicate the unit is connected to mains power and an operation voltage is present.
Volume Control
This controls the loudness of the audio reproduced by the internal speakers or connected headphone. Clock-wise rotation
of this control increases the loudness of the monitored audio.
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.
