Configuring output mode, Remote control lockout – Grass Valley 8920ADC v.2.0 User Manual
Page 16
10
8920ADC Instruction Manual
8920ADC Analog Audio to AES/EBU Converter
■
Apply the maximum level to the input (example +24 dBu) and adjust
the gain toggle switch for each channel until the clip LED comes on.
This is -0.5 dBFS, and by tapping the toggle switch four more times you
will be within 0.15 dB (worst case) of the correct gain setting.
CAUTION
Using a maximum level that is larger than the high end of the range setting
jumper will result in a clipped waveform and high distortion. Use the next
higher jumper setting that includes the maximum level and readjust the gain
following the instructions above.
Configuring Output Mode
The 8920ADC provides thirteen possible output configurations as shown in
. The module can be configured using the rotary switch shown in
. To make a configuration setting, rotate the switch to the
desired output configuration. The 16-position rotary switch selects one of
13 possible output modes. Positions B and C are not used and positions 0
and F select the same mode—the factory default.
Remote Control Lockout
When a jumper is placed across pins 1 and 2 of jumper block JP7 (see
), module output mode settings are adjustable from the
Local on-board switches only. To have both Local and Remote access, set
the jumper across pins 2 and 3.
Table 5. 8920ADC Output Mode Configuration
Switch
Position
Mode Description
0
Factory default – No phase inversion, channel swapping or summing
1
Channel swap – Left and Right
2
Both channels phase inverted
3
Left channel phase inverted
4
Right channel phase inverted
5
Right channel to both channel outputs
6
Left channel to both channel outputs
7
Left + Right to both channel outputs (-6 dB mono sum)
8
Left - Right to both channel outputs
9
Left + Right to Left channel output and Left- Right to Right channel output
A
Left + Right to both channel outputs and both channels phase inverted
B
Not used (outputs AES silence)
C
Not used (outputs AES silence)
D
Tone 1 to all channels (AES Silence)
E
Tone 2 to all channels (1 kHz, -20 dBFS)
F
Factory default – No phase inversion, channel swapping or summing