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ATSC/DVB-3/SDI User Manual P/N 821557 Rev-A
WOHLER
TECHNOLOGIES
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 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
4
ATSC/DVB-3/SDI
2U Stereo Digiotal Audio Speaker Monitor
AVG
O
OUT
IN
POWER
0
0
2
2
4
4
7
7
10
10
2
3
13
13
1
4
16
16
SDI
18
18
20
20
22
22
25
25
28
28
31
31
INPUT
SDI GROUP
34
34
SOURCE
38
38
1
-AES
SELECTOR DISABLED
42
42
46
46
3
4
51
51
2
5
2
-SDI
56
56
66
66
1
6
L FRONT
R FRONT
CENTER
1
2
3
LEFT SPEAKER
SOURCE
SELECT
ATSC/DVB-3/SDI Front Panel
© 2003 Wohler Technologies Inc. ALL rights reserved
INPUT
AC-3
PCM
STATUS
1
2
PRO-16
SELECT
ALL
SELECTED
LF EFX
Description
Features
• 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
Section 1: General Features and Specifications
0
0
2
2
4
4
7
7
10
10
13
13
16
16
1
18
18
20
20
22
22
25
25
28
28
2
31
31
SUBGROUP
34
34
38
38
SELECTOR DISABLED
42
42
46
46
3
4
51
51
2
5
56
56
66
66
1
6
L SURR
R SURR
4
5
6
RIGHT SPEAKER
SOURCE
SELECT
ATSC/DVB-3/SDI
DIGITAL AUDIO
MONITOR PANEL
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