Link electronic Network Router PTC 892 User Manual

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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