Troubleshooting; Answers To Frequently Asked Questions; Which Serial Port Should I Connect To; There Is No Sdi Video Present On The Sdi Output - evertz MIO-CCE-4K/3G User Manual

7.

TROUBLESHOOTING

7.1.

ANSWERS TO FREQUENTLY ASKED QUESTIONS

7.1.1.

Which Serial Port Should I Connect To?

Any serial port can be used for typical captioning functions, since they all use the same Control-A serial
protocol. All three serial ports are configured from the factory to work with an off-the-shelf null-modem cable.
Ports A, B, and C are all configurable to support both RS-232 and RS-422 communications.
If the user wishes to connect to an ATSC encoder, Port B must be used. Port B

support SMPTE-333M and Grand Alliance protocols, configurable using VistaLINK
menu system of the MIO-CCE-3G/4K. Please see section 5.8.
7.1.2.

There is No SDI Video Present on the SDI Output

The MIO-CCE-3G/4K includes video bypass relays to ensure that video is passed, even when the unit is
powered-down. Make sure that your SDI source is connected to the BNC connector marked INPUT A/B,
and the primary 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. Activate the appropriate A or B bypass relay.
2. Connect your SDI source to the SD-SDI IN connector.
3. Look for video out of the SDI BYPASS PGM OUT connector.
If there is still no SDI video passing through the unit, check for presence of SDI video upstream, and check
for cabling problems.
7.1.3.

How Do I Check if Captions are Being Processed?

7.1.3.1.

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
3G/4K.
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:
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 MIO-CCE-3G/4K.
Turn the MIO-CCE-3G/4K on.
•
Using VistaLINK
•
SMPTE ST 2110/4K/3G/HD/SD Closed Caption Encoder with Media–to–IP Streaming
Baud
Parity
Data bits
Stop bits
Flow Control
menu system set the desired port to Control A protocol.
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