Audio Board - Barco Hydra User Manual

3.2.7 Audio board

The audio boards serve to monitor audio signals. An audio board consists of an audio motherboard and one or
two audio daughterboards, which are plugged on the audio motherboard. Up to two audio motherboards can be
used in one H .
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The audio input is inserted into the audio daughterboards. A daughterboard is of analog balanced, digital bal-
anced or digital unbalanced type. On an audio motherboard analog and digital daughterboards can be mixed. On
one daughter board there are 28 mono or 14 stereo channels available. This means an audio motherboard may
contain 56 channels. A H
Connectors
Each audio daughterboard is equipped with a SCSI-4 connector. The figure below shows an audio board, fully
equipped with two daughterboards of digital unbalanced type:
1 SCSI port 1
2 SCSI port 2
The writing on the front plate of the audio board differs according to the type of daughter boards, which are
plugged on it, nevertheless the numbering of the ports remains the same. The following table lists which writing
on the front plate refers to which audio daughter board:
Writing
BALANCED ANA
BALANCED DIG
UNBALANCED DIG
The SCSI cable between the audio boards and Parthenope are not very strong. Handle them
with care. Do not bend!
If connecting 600 Ohm audio sources to an analog audio daughterboard, then to receive
best signal quality the audio input at the Hydra should be terminated with a 600 Ohm
resistor!
Order
The audio boards are inserted into the slots on the left of the output card (looking from the back on the H
Barco – Hydra – R5976260 – Revision 10 – February-2004
8 mono or 14 stereo channels available. This means an audio motherboard may
with maximal two audio motherboards may monitor herewith 112 audio channels.
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quality the audio input at the Hydra should be terminated with a 600 Ohm
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1
Connectors of analog and digital daughterboard
Type of daughterboard f daughterboard
Analog balanced
Digital balanced
Digital unbalanced
No daughterboard
3. Getting started
Figure 3-19
Table 3-3
Writing on the audio board
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