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System
1
On
0
Off
LTC DST Config
System/On/Off
Local
LTC
Time
Input
UTC
Serial
Port
Control
Figure 3-11: 8084 Local Time to UTC Conversion Block Diagram
>TEST MESSAGE
Test msg off
Test msg on
OPERATION
Models 8084/8084AD/8085 Closed Caption Encoder Manual
Calculate
UTC Time
Local
UTC
LTC RDR Config
Local/UTC
3.3.10 Encoding a Test Message
During system setup and verification it is often desirable to have the
caption encoder generate a test message. Data integrity and signal quality
of the captioned signal may be verified using the test message.
TEST MESSAGE
test messages or not.
Select Test msg on to enable test message encoding. The
encoder will insert a test message that includes all 9 data
channels. This is generated by simulating a data stream into
the Port A communications buffer. The COMM LED will blink
On and the Port A output will generate a stream of prompt
characters ('*').
This will allow you to verify the setup of your system without
having a computer sending data to the 8084(AD).
The test message mode will be automatically turned off
whenever the keyer is turned off from the front panel, or when a
Control-C character is received on any communications port
from captioning software.
Select Test msg off to disable the encoder test message.
System
DST Flag
Calculate
Local Time
System
Time
(UTC)
System
Create
Timezone
"Time of Day"
Offset
XDS Packet
Stored
Time Data
in Encoder
is used to select whether the encoder will generate
(e.g.: TST F2 C1) is encoded for the CC3 data stream
Revision 1.6.6
Front Panel
Display
T
.: 09.52:02
Encode On
Video Line 21, Field 2
Page 3-26
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