evertz 7721AD4-B-HD, Руководство пользователя

Страница: 17 / 22

7700 MultiFrame Manual
7721AE4-(B)-HD HDTV 4 Channel AES Audio Embedder
Revision 1.5
Page-13
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 LED
1 2 3 4 5 6 7 8
Control
Description
Value
Description
1 2 3 4
Off Off Off On Off Off Off Off Disable Off Off Off Off
Sample Rate
Converter
Enable On On On On
Table 5-9: Sample Rate Conversion Switch Settings
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 LED
1 2 3 4 5 6 7 8
Control
Description
Value
Description
1 2 3 4
On Off Off On Off Off Off Off Video Only On Off Off Off
Audio Only Off On Off Off
Status LED
Mode
Video/ Audio On On Off Off
Table 5-10: Module OK Status LED Switch Settings
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 LED
1 2 3 4 5 6 7 8
Control
Description
Value
Description
1 2 3 4
Off On Off On Off Off Off Off Black Off Off Off Off
Loss of Video
Mode
Blue On On On On
Table 5-11: Loss of Video Mode Switch Settings