© 2005 Wohler Technologies Inc. ALL rights reserved
8
ATSC/DVB-3
User Manual P/N
821507
Rev-
D
2
3
4
5
6
7
8
9
10
1
Please refer to
Figure-2a
on the facing page to familiarize yourself with the front panel features of the
ATSC/DVB-3
unit. The
following sections describe these features and are referenced, by number, to
Figure-2a
.
Front Panel Features
Section 2:
Operation
Speakers (Left, Right, and Woofer)
The
ATSC/DVB-3
internal speaker system is comprised of two mid-range tweeter speakers (left and right) and one woofer
speaker (middle). The two side channel speakers reproduce, in stereo, only the mid and high frequencies. Please note that
the woofer speaker (middle) is not a dedicated Center nor LFE speaker. See page
14
for more information about the audio
amplifier and speaker configuration.
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 in the speakers or headphones.
Speaker Select Switches (Left and Right)
These two six position rotary switches are used to isolate and monitor any one of the six possible channels through the left
and/or right speakers. Choose positions
1
through
6
for each switch (left or right) and the chosen channel will be monitored
from the respective speaker.
Note:
If the
All/Selected Switch
(
Item 8
) is set to the
ALL
position, then both of these
switches are disabled and the
Selector Disabled LEDs
(
Item 4
) will glow RED.
Selector Disabled LED (Left and Right)
These two LEDs will glow RED to indicate that the
Speaker Select Switches
(
Item 3
) are disabled because the
All/
Selected Switch
(
Item 14
) is set to the
ALL
position.
Audio Level Meters (1-6)
Audio levels for source channels
1
-
6
are displayed via six high resolution 53-segment LED bargraph meters (three on the left
side of the front panel; three on the right side). Dynamic range for these meters is
65 dB
and they are able to display signal
levels using both
PPM
and
VU
standards. An adjustable-duration hold of peak
PPM
value may also be displayed. Each
meter is labeled according to the standard Surround Sound nomenclature (left front, right front, center, low frequency
effects, left surround, and right surround). See page
17
for more information about these level meters.
Level Meter Brightness Controls (1-3 and 4-6)
The brightness of the bargraph meters are adjustable via these two recessed controls. The left control adjusts the brighness of the
left three LED bargraphs (
1-3
) and the right control adjusts the brighness of the right three bargraphs (
4-6
). You must use a small
flathead screwdriver or similar tool to adjust these controls.
Input Source Select Switch
This two position toggle switch allows the operator to choose between two possible input sources;
Input Source 1
or
Input
Source 2
.
Input Source 1
accepts
AC-3
or
AES
signals and is comprised of a
balanced
input and loop-through output on XLR
connectors (
Item C
) and an
unbalanced
input and loop-through output on BNC connectors (
Item D
).
Input Source 2
accepts
AC-3
or
AES
signals and is comprised of a
balanced
input on an XLR connector (
Item F
) and an
unbalanced
input on a BNC
connector (
Item G
).
All/Selected Select Switch
When this two position toggle switch in in the
SELECTED
position, channel selection defaults to the selection as set by the right
and left
Speaker Select Switches
(
Item 3
). When in the
ALL
position, a stereo mixdown of the five full channels is applied to the
speaker amps (the LFE channel is excluded). Speaker channel assignment for the
ALL
setting is as follows:
•
Left Speaker Channel
= LSurr + 1/2Center
•
Right Speaker Channel
= RSurr + 1/2Center
Balance Control
This adjusts the volume balance between the left and right speakers or headphones.
Power LED
The LED glows GREEN to indicate the unit is connected to mains power and an operation voltage is present.
(Continued)
