HD9084 HDTV Caption Encoder Manual
TROUBLESHOOTING
Page 6-5
2. Connect your SD-SDI source to the SD-SDI IN connector.
3. Look for video out of the SD-SDI BYPASS PGM OUT connector.
If there is still no SD-SDI video passing through the unit, check for presence of SD-SDI video upstream,
and check for cabling problems.
6.3.4.
There is No HD-SDI Video Present on the HD-SDI Output
The HD9084 includes a HD-SDI video bypass relay to ensure that HD-SDI video is passed, even when
the unit is powered-down. Make sure that your HD-SDI source is connected to the BNC connector
marked HD-SDI PGM IN, and the primary HD-SDI video output is connected to the BNC connector
marked HD-SDI BYPASS PGM OUT. If you still see no video, try the following:
1. Unplug the power from the Closed Caption Encoder.
2. Connect your HD-SDI source to the HD-SDI IN connector.
3. Look for video out of the HD-SDI BYPASS PGM OUT connector.
If there is still no HD-SDI video passing through the unit, check for presence of HD-SDI video upstream,
and check for cabling problems.
6.3.5.
How Do I Check if Captions are Being Processed?
6.3.5.1.
Control-A Protocol Test Using a Terminal Program
Control-A protocol can be used to determine if captions are processed and available out of Ports A, B,
or C. Please ensure the latest firmware is downloaded from
HD9084.
Follow the load firmware section in 5.2.
Procedure:
•
Connect a null modem cable to Port A,B, or C and to the RS-232 communication port of a PC.
•
Begin a Terminal Program (Windows Hyper-terminal) and configure the communication settings
to the following:
Baud
57600
Parity
none
Data bits
8
Stop bits
2
Flow Control
None
•
Make sure captions are present in the up-stream SD-SDI and/or HD-SDI video or enable the
CEA-608 Test Message of the HD9084.
•
Turn the HD9084 on.
•
Using the front panel menu system set the desired port to Control-A protocol. See section 3.6.
•
Set the Port settings to match the settings in Hyper-terminal as shown above.
•
Press ENTER on the keyboard and ensure you see an asterisk (
*
) prompt every time you push
the ENTER key.
•
If you do not see the asterisk (
*
) prompt, communication has not been established between the
HD9084 and PC. Begin from the beginning of this procedure and ensure all settings are
correct.
•
At the prompt with the *astrix in Hyper-Terminal, type in the following command:
USO
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