Diamond TX Series - Equipment Description

Transmitters 9 November 2001 79
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Tran sm it te r
Equipment Description
DT-TX series plug-in transmitters convert radio frequency
(RF) input into an optical signal and send it, through single
mode fiber optic cable, to optical receivers (nodes) in a
hybrid fiber-coaxial network. The 200-TX modules are return
transmitters; the 700-TX and 800-TX modules are forward
transmitters.
The DT-QTX facilitates the
use of dense wave division
multiplexing (DWDM) for
services such as high-speed
internet access, telephony,
and video-on-demand.
DT-QTX quadrature amplitude modulated (QAM)
transmitters are part of the SpectraHubä 1550 nm Analog/
Digital Overlay Transport System designed for use in the
Diamond Transport Shelf. The 810-QTX offers a 400 MHz
to 870 MHz frequency response and is designed for forward
narrowcast applications. The 210-QTX offers a 5 MHz to
200 MHz frequency response for return path applications.
Figure 35. Diamond™Transport Transmitter Module
All DT-TX and DT-QTX series transmitters fit into the DT-Shelf’s
universal slots. TX series transmitters transmit analog broadband
signals over optical fiber. QTX series transmitters are part of
Philips’ 1550 nm Analog/Digital Overlay Transport System.