© 2003 Wohler Technologies Inc. ALL rights reserved
4
ATSC/DVB-3/SDI User Manual P/N 821557 Rev-A
Features
ATSC/DVB-3/SDI
Description
Section 1: General Features and Specifications
The
ATSC/DVB-3/SDI
is a powered stereo monitor designed specifically for flexible, comprehensive monitoring of the six audio
channels associated with ATSC/DVB programming. The unit is 2RU in size, for excellent fidelity without using excessive rackspace
in the critical "operating zone" of rack bays and consoles.
The
ATSC/DVB-3/SDI
monitors
SDI
(Serial Digital Interface),
PCM
(Pulse Code Modulation),
AES/EBU,
and
AC-3
(Dolby Dig-
ital
®
) signals providing capabilities to handle monitoring requirements throughout the facility.
The speakers and amplifiers are arranged in the popular Wohler “biamp summed bass stereo” configuration: bass frequencies from
ALL selected channels are summed into a 20 watt amplifier, which drives the woofer. The two side channel amplifiers and speakers
reproduce, in stereo, only the mid- and high-frequencies. Note that the center speaker (the woofer) is NOT a dedicated
Center
nor
LFE
speaker. There is also a headphone output, which mutes the speakers while in use.
Six high-resolution wide-range LED bargraph level meters are provided for all six channels for very accurate metering. Fifty-three bi-
color segments spanning a range of 65 dB simultaneously display signal levels according to both the
PPM
and
VU
standards. An
adjustable-duration hold of the
Peak PPM
value may also be displayed.
Both Left/Right and Front/Surround "Phase"/Polarity LED indications are provided to alert of possible cancellation from mixdown in
any likely playback situation.
To isolate possible faults, two rotary switches on the front panel let the operator route any one or pair of inputs independantly to left and
right speaker channels for acoustic monitoring. A toggle switch is provided for mixing all six channels down to two for listening to all
channels at once.
2U Stereo Digiotal Audio Speaker Monitor
ATSC/DVB-3/SDI Front Panel
• 2U high: highest fidelity in minimum rackspace
• Monitors SDI, AC-3 (Dolby Digital), and PCM or AES/EBU
audio signals
• Simultaneous visual monitoring of all 6 channels
• 53-segment tri-color, wide-range, high-resolution LED
bargraph level meters
• SDI, AC-3, and PCM or AES/EBU Status Indication LEDs
• Pro-16 signal select switch and indication LED
• Left/Right Front “phase" indicators
• Select any channel or pair of channels for isolated listening, or
a stereo mixdown of all 6 channels
• Selected channel analog outputs on XLR connectors
• Headphone output
AVG
10
13
16
31
28
22
20
25
18
46
51
38
42
66
56
34
L FRONT
1
SELECTOR DISABLED
POWER
IN
34
CENTER
SOURCE
R FRONT
2
56
66
46
51
38
42
3
2
2
4
7
18
31
28
22
20
25
10
13
16
4
7
OUT
O
0
0
STATUS
INPUT
AC-3
PCM
0
13
16
4
10
7
31
22
20
25
28
18
2
51
38
46
42
66
56
34
34
4
LF EFX
SELECTED
ALL
SOURCE
L SURR
56
66
46
51
38
42
5
2
18
31
28
22
20
25
10
13
16
4
7
0
R SURR
6
DIGITAL AUDIO
MONITOR PANEL
2
1
SELECT
PRO-16
WOHLER
TECHNOLOGIES
ATSC/DVB-3/SDI
SELECT
LEFT SPEAKER
6
5
4
3
2
1
4
3
2
1
SDI GROUP
6
5
4
3
2
1
SELECTOR DISABLED
SELECT
RIGHT SPEAKER
2
1
SUBGROUP
-SDI
2
-AES
1
SOURCE
INPUT
SDI
