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5.5.
SELECTING SAMPLE RATE CONVERSION FOR AES INPUTS
When the DIP switches are as shown in Table 5-9, the toggle switch is used to select whether the sample
rate conversion for the AES inputs is enabled or not.
DIP Switch
1
2
3
4
Off
Off
Off
On
When the Sample Rate converters are Enabled, the AES inputs are sample rate converted at 48 kHz
which is synchronous to the input video. AES inputs can be either synchronous or asynchronous to the
video source.
When the Sample Rate converters are Disabled, the content of AES inputs is preserved without any loss,
and directly embedded into the input video. AES inputs must be synchronous to the video source. This
setting is required when embedding Dolby E.
5.6.
SELECTING FUNCTION OF THE MODULE OK STATUS LED
When the DIP switches are set as shown in Table 5-10, the toggle switch is used to select the function of
the Module OK LED status indicator (please refer to section 4.1).
DIP Switch
1
2
3
4
On
Off
Off
On
In the Video only mode the Module OK status LED will be On when there is video present.
In the Audio only mode the Module OK status LED will be On when there is audio present on at least one
of the AES inputs.
In the Video and Audio mode the Module OK status LED will be On when there is video present and there
is audio present on at least one of the AES inputs.
5.7.
SELECTING OPERATION WHEN THERE IS NO VIDEO INPUT
When there is no input video, the 7721AE4-HD will generate its own video and embed the audio onto it.
When the DIP switches are set as shown in Table 5-11, the toggle switch is used to select whether the
module will generate black or blue video.
DIP Switch
1
2
3
4
Off
On
Off
On
5
6
7
8
Off
Off
Off
Off
Table 5-9: Sample Rate Conversion Switch Settings
5
6
7
8
Off
Off
Off
Off
Table 5-10: Module OK Status LED Switch Settings
5
6
7
8
Off
Off
Off
Off
Table 5-11: Loss of Video Mode Switch Settings
Revision 1.4
7721AE4-HD HDTV 4 Channel AES Audio Embedder
Control
Value
Description
Description
Sample Rate
Disable
Converter
Enable
Control
Value
Description
Description
Video Only
Status LED
Audio Only
Mode
Video/ Audio
Control
Value
Description
Description
Loss of Video
Black
Mode
Blue
7700 MultiFrame Manual
LED
1
2
Off
Off
On
On
LED
1
2
On
Off
Off
On
On
On
LED
1
2
Off
Off
On
On
7721AE4-HD-13
3
4
Off
Off
On
On
3
4
Off
Off
Off
Off
Off
Off
3
4
Off
Off
On
On
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