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7700 MultiFrame Manual
7736CD2 Dual Composite Decoder
4.2.
AUDIO STATUS LEDS
Four LEDs located on the lower end of the module (near the card extractor) indicate which audio channels
are present. Audio channel 1 LED is located closest to the center of the module. Analog audio (on -A4
versions) presence is determined with a silence detector. If the audio is not silent, the LED will be on.
Eight bi-colour (Red and Green) LEDs located on the edge of the audio sub-board indicate which audio
channels are present. Audio channel 1 LED is located at the top of the sub-module. This analog audio
presence is determined based on level peaks.
corresponding Green LED will be on. If the converted audio peaks reach above –1 dBFS, the
corresponding Red LED will also light up to indicate clipping proximity warning.
Page - 10
Audio LED
Colour
1
Green
2
Green
3
Green
4
Green
Table 4-1: Audio Channel Status LEDs (-A4 Version)
Audio Channel Status
Off
No channel 1 present.
Channel 1 present.
Off
No channel 2 present.
Channel 2 present.
Off
No channel 3 present.
Channel 3 present.
Off
No channel 4 present.
Channel 4 present.
If the converted audio peaks rise above –60 dBFS, the
Revision 1.0.4
7736CD2-A8
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