6
Introduction
The Telecast DiamondBack2™ system consists of a dual optical output fiber
optic transmitter/multiplexer (TX) and a mating receiver/demultiplexer (RX). The
TX unit multiplexes and launches simultaneously onto the fiber up to eight
NTSC/PAL/SECAM video signal channels plus a ninth auxiliary port for
compatible data use only. The compatible devices include the Telecast Adder™
161 and Adder™ 882i, which mux audio and data/switch or intercom and
data/switch information onto a coax to the BNC input on the DiamondBack2 TX.
Within a DiamondBack2 TX, the video signals are first digitized at 23.04 Mb/sec x
10 bits and then multiplexed at a data clock rate of 2.488 Gb/s. This digital data
is converted to an optical signal and launched into the fiber. The DiamondBack
RX receives the optical transmission and restores the video and data signals to
the corresponding output ports.
The DiamondBack2 TX is optionally equipped with two parallel laser outputs for
redundancy or split feeds. In redundant operation, the DiamondBack RX accepts
two optical inputs, with automatic switchover protection.
The DiamondBack2 TX and RX units have similar appearances; front and rear
views are shown in the photo on the opposite page. Front panel indicators for
channel and system status are very similar, and the locations of the electrical I/O
connections on the rear panels are identical.
A rotary switch and BNC output on both TX and RX front panels enables the
selection of one of the eight video signal channels for display on a local monitor.
An internal Ni-Cad battery provides backup in the event of line power loss.
DiamondBack2’s are housed in a standard 19 inch electronics rack.
Setup
The DiamondBack system consists of:
• One DiamondBack2 TX Transmitter
• One DiamondBack2 RX Receiver
• Two external power supplies (AC/DC adapters)
• Rack mount adapter kits (ears)
