Local onboard configuration settings – Grass Valley 8920DMX User Manual
Page 15
8920DMX Instruction Manual
15
Configuration
Local Onboard Configuration Settings
The 8920DMX can be configured using the rotary switch shown in
to access the configuration items shown in
. To make a
configuration setting, rotate the switch to the desired configuration param-
eter. Use the paddle switch to select either the switch Up or switch Down
setting.
Note
Currently, when an audio group is extracted and deleted from the SD output,
the demultiplexing chip does not revise the CRC checksum included in the
output signal. As a result, a CRC error may be reported by downstream
devices.
provides the possible input conditions and the output condition
that result when the rotary switch is set to extract and pass G1 (position 2),
G2 (position 3), G3 (position 4) or G4 (position 5) or extract and delete the
selected group.
Table 3. 8950DAC Configuration Functions
Function
Switch
Paddle
Switch Up
Paddle
Switch Down
Function Description
0
--
--
Inactive position
1
--
--
Not Used
2
St 1/2 from G1 and pass G1
N/A
Extracts and passes AES1 and AES2 from Group 1, if signals are present
3
St 1/2 from G2 and pass G2
N/A
Extracts and passes AES1 and AES2 from Group 2, if signals are present
4
St 1/2 from G3 and pass G3
N/A
Extracts and passes AES1 and AES2 from Group 3, if signals are present
5
St 1/2 from G4 and pass G4
N/A
Extracts and passes AES1 and AES2 from Group 4, if signals are present
6
St 1/2 from G1 and delete G1
Same as Setting 2/Up
Extracts and removes or passes G1 AES/EBU in the D1 output stream
7
St 1/2 from G2 and delete G2
Same as Setting 3/Up
Extracts and removes or passes G2 AES/EBU in the D1 output stream
8
St 1/2 from G3 and delete G3
Same as Setting 4/Up
Extracts and removes or passes G3 AES/EBU in the D1 output stream
9
St 1/2 from G4 and delete G4
Same as Setting 5/Up
Extracts and removes or passes G4 AES/EBU in the D1 output stream
A-D
--
--
Not used
E
CRC from input signal
CRC internally generated
Select source of CRC and UVC generation. Internal inserts internally gen-
erated CRC/UVC into both streams
F
Recall
Store
Store or recall user settings
Table 4. Possible Operating Conditions
SD Video
Input Condition
AES/EBU Audio
Input Condition
Output Condition
Present
Present
If G(n) exists in incoming video, AES1 and AES2 will be extracted, and unchanged video will be
passed. If G(n) does not exist in the incoming video, the AES output will be digital silence.
Present
Not Present
If no audio group exists in incoming video, AES output will be digital silence.
Not Present
Not Present
If no video or audio input, video output will be random noise and audio output will be digital silence.
Present
Present
If extracted group has been selected to be deleted (rotary switch settings 6 – 9), extracted audio group
will be deleted from incoming video stream. (See
Note
above concerning CRC errors.)