CLOSED CAPTION SERIES
MADE IN THE USA
LINK ELECTRONICS, INC.
CAPTION ENCODER/DECODER SD SDI/ANALOG
MODEL PTC-892
FEATURES
‹ V-Chip compatible & TSID ready
‹ Dual RS-232 com ports
‹ LTC input & “B” Type USB port
‹ Detailed front panel display with menus
‹ Data Recovery of both caption & text
‹ Weather Lift up to 4 lines
‹ Firmware version viewed from front panel
‹ User, power-up, and factory default settings
‹ SD analog decoded outputs including component
‹ Optional Modem w/ RI, OH, and CD indication
‹ User selectable encode modes, including newswire
‹ SD SDI to SD analog conversion
‹ SD SDI/analog encoded outputs
‹ User selectable data recovery modes
‹ Auto Detection of NTSC/PAL
‹ Encodes both caption and text
The PTC-892 is captioning encoder, decoder,
and data recover capable of inserting, decoding,
and recovering data of captions and text for
NTSC/PAL for the following signals: composite,
Y/C, S-video, RGB, YUV, and SDI.
encoders to be controlled at once, a back up
communication port, or to do data recovery out of
its ports. Port 1 is either a “B” type USB port or
RS-232 port. Port 2 is either a RS-232 port or an
optional modem. Both ports can be set to have
different baud rates (1200, 2400, 4800, 9600,
19200, 38400) independently through the front
panel menus.
Captioning and text may be inserted (encoded) in
either field of the Vertical Blanking Interval (VBI).
That inserted data may be displayed as open
captions through the decoder output(s). In
addition, caption data on the incoming or
outgoing video may be recovered from either field
of the VBI. This data can be sent to another
encoder, to a language translation machine or
program then re-encoded, or to be captured by a
program to be manipulated. Each of these
important functions (encoding, decoding, and
data recovery) may be done silmultaneously.
Each of these functions can be controlled by the
front panel menus or by serial communications.
RS-232 port 2 will not go down to a baud rate of
1200, because new modems will not allow this.
When the optional modem goes off-hook, it takes
priority over the RS-232 port 2. The RS-232 port
2 control is restored when the modem hangs up.
Front panel LEDs show the unit status with
NTSC/PAL detection, modem status, encode
on/off, video presence detection, negative
pedestal on/off, serial data detection, and LTC
detection. Front panel push buttons allow the
user to select input, select output, perform an
encoder test, and bypass the encoder.
Inputs and outputs are provided for both SD SDI
and SD analog, including composite, Y/C, S-
video, YUV and RGB. The power loss feature
bypasses the composite analog and SDI when
AC power to the PTC-892 fails.
The PTC-892 is V-chip technology compliant and
TSID ready. Link Electronics is incorporating this
technology in the firmware of the PTC-892. The
PTC-892 handles automatic repetition of the “V-
Chip” data and can interweave it with existing line
21 closed captioning data.
In response to the FCC mandated requirements,
captions shall not interfere with emergency
crawls. The PTC-892 incorporates a weather-lift
feature that moves the caption up to 4 lines,
whenever a contact-closure is detected on its
GPI input. The number of lines can be controlled
by the front panel or by software commands.
The PTC-892 has a Longitudinal Time Code
(LTC) input for precise caption timing with the
video. A front panel Vacuum Fluorescent Display
(VFD) shows various functions and menus. A
rotary optical encoder, front panel knob, provides
easy selection of the various operating and set-
up functions.
The serial communication port(s) allow for remote
captioning. The dual ports allow multiple
LINK
ELECTRONICS, INC. ELECTRONICS, INC. ‹ 2137 Rust Avenue ‹ Cape Girardeau, MO 63703-7668
Phone 573 334 4433 ‹ FAX 573 334
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