evertz 8084 Instruction Manual page 49

OPERATION
Models 8084/8084AD/8085 Closed Caption Encoder Manual
COMP VIDEO IN When lit, the caption encoder has detected incoming
composite analog video of the correct standard. When the LED
is flashing, there is a problem such as incorrect video standard,
or the video is of poor quality. The 8084AD may still be able to
key captions onto poor quality analog video, depending on the
severity of the problems. When off, no incoming video has been
detected at the ANALOG VIDEO IN connector.
FLD 1 ENABLE
FLD 2 ENABLE Indicates
information into Field 1 and/or Field 2 of the video when lit.
Null characters will be inserted if there is no incoming data from
the communications ports, or if there is no upstream caption
information for the particular field when in "stream" mode.
The front panel message will display LINE 21 KEY when either
keyer is enabled.
COMM Indicates that data is being received or transmitted on any of the
communications ports. The LED will also be on during the Test
Message Mode that simulates communications with captioning
software.
BUFFER FULL Indicates that one of the communications buffers is
full. The caption encoder sends an XOFF command to the
sending computer to temporarily stop the communications until
the communications buffer is empty, at which time an XON
command will be sent to the computer. RTS flow control is also
used to temporarily stop the communications.
FLD1 DATA OUT Indicates that non-null data being received on one of
the communications port or from the upstream captions is being
inserted into the Field 1 data queue. When the Field 1 captions
are enabled, this data will be inserted on line 21 in field 1.
FLD2 DATA OUT Indicates that non-null data being received on one of
the communications port or from the upstream captions is being
inserted into the Field 2 data queue. When the Field 2 captions
are enabled, this data will be inserted on line 21 in field 2.
DATA OUT Indicates that non-null data being received on one of the
communications port or from the upstream captions is being
inserted into the data queue for either field. When a caption
keyer is enabled, this data will be inserted on line 21. This
indicator is lit when FLD1 DATA OUT or FLD2 DATA OUT
would otherwise be lit.
Revision 1.6.6
that the device is keying caption
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