© 2003 Wohler Technologies Inc. ALL rights reserved
10
ATSC/DVB-3/SDI User Manual P/N 821557 Rev-A
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Please refer to
Figure-2a
on the following page to familiarize yourself with the front panel features of the
ATSC/DVB-3/SDI
unit.
The following sections describe these features and are referenced, by number, to
Figure-2a
.
Front Panel Features
Section 2: Operation
Speakers (Left/Middle/Right)
The
ATSC/DVB-SDI
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.
Speaker Select Switches (Left and Right)
Use the
left
switch to select any one of six selected channels for monitoring from the
left
speaker. Use the
right
switch to
select any one of six selected channels for monitoring from the
right
speaker.
Note:
These two switches are only functional when the
All/Selected Switch
(
Item 7
) is in the
SELECTED
position. These
two switches are NOT functional when the
All/Selected Switch
is in the
ALL
position.
Speaker Select Disabled Indication LEDs (Left and Right)
When the
All/Selected Switch
(
Item 7
) is in the
ALL
position (thus
disabling
the
Speaker Monitor Select Switches
) both
of these LEDs will glow RED.
Audio Level Meter LED Bargraph Displays (1-6)
Audio levels for source channels
1
through
6
are displayed via these six high-resolution 53-segment LED bargraph display
level 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
20
for more information about these level meters.
Bargraph Brightness Trim Pot (Left and Right)
These two trim pots are recessed into the front panel and can be accessed using a small screwdriver. Turning either trim pot
clockwise
will increase the relative brightness of the associated bargraph display LED segments. The
left
trimpot affects the
left
three bargraph displays (
1
-
3
); the
right
trim pot affects the
right
three bargraph displays (
4
-
6
).
Input Source Select Switch
This 2-position toggle switch allows the operator to choose between two possible input sources (
1-AES
or
2-SDI
) for
monitoring through the unit. Choosing
1-AES
selects the
AC-3
or
PCM/AES
signals entering the
Source 1
connectors on
the rear panel (See
Items C
and
D
, page 14). Choosing
2-SDI
selects an
AC-3
or
PCM/AES
source that is de-embedded
from the
SDI
signal entering the
Source 2
connector on the rear panel (see
Item F
, page 14).
All/Selected Switch
When this 2-position toggle switch in in the
ALL
position, a stereo mixdown of the five full channels is applied to the speaker
amps (the LFE channel is excluded). In this posiotion both the
left
and
right
Speaker Select Switches
(
Item 2
) are disabled
and the
Speaker Select Disabled Indication LEDs
(
Item 3
) will glow RED.
When this switch is in the
SELECTED
position, channel selection defaults to the settings as selected by the
left
and
right
Speaker Select Switches
(
Item 2
) and the
left
and
right
Speaker Select Disabled Indication LEDs
(
Item 3
) will be unlit.
SDI Group Select Switch (1, 2, 3, or 4)
This 4-position rotary switch allows the operator to choose
SDI GROUP 1
,
2
,
3
, or
4
for monitoring. The
Subgroup
(
1
or
2
)
of each
SDI GROUP
is selected using the
SDI Subgroup Select Switch
(
Item 17
, page 12).
Note that the
Input Source Select Switch
(
Item 6
) must be set to
2-SDI
in order for the selected
SDI
signals to be actively
monitored.
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.
(Continued)
