© 2004 Wohler Technologies Inc. ALL rights reserved
8
AMP1-VS and AMP1-VSA
User Manual P/N
821613
, Rev-
B
1
2
5
6
7
3
4
Please refer to
Figure-2a
on the facing page to familiarize yourself with the front panel features of the
AMP1-VS
and
AMP1-VSA
units.
The following sections describe these features and are referenced, by number, to
Figure-2a
.
Front Panel Features
Section 2:
Operation
(Continued)
Speakers
The
AMP1-VS
and
AMP1-VSA
feature two mid-range speakers (left and right) and
two
woofer speakers. 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 two
woofer (bass) speakers. Note that the woofer channel is NOT a dedicated
LFE
(subwoofer) or
Center
channel. See page
14
for more information concerning the
AMP1 Series
audio amplifier/speaker configuration.
Headphone Jack
This jack accepts a standard 1/4” phone type stereo plug. When you plug in headphones, the internal 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.
Audio Level Meter LED Bargraph Displays (1-4)
Audio levels for the four source channels are displayed via these four tri-color LED bargraph meters. All bargraph LED
segments are of the tri-color type (green, amber, red) and the meters are user adjustable for
Reference 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
meter specifications, see page
5
.
Analog/Digital Source Select Switch (-VSA Model Only)
This two position toggle switch selects between the two primary input sources of the
AMP1-VSA
model;
ANALOG
or
DIGITAL
. When this toggle switch is set to
ANALOG
, the unit will monitor the source signals as input on the rear panel
ANALOG IN
Phoenix connectors (
Item G
, page
10
). When this toggle switch is set to
DIGITAL
, the unit will monitor the
SDI
digital source signals as input on the rear panel
SDI IN
BNC connectors (
Item D
, page
12
).
Volume Control Pot
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 in the speakers or headphones.
Power LED
This LED glows GREEN to indicate the unit is connected to mains power and an operation voltage is present.