6
Theory of Operation 6-1DXL5000 User and Technical Manual
Theory of Operation
6.1 Chapter Overview
This chapter provides additional details about the design and
function of the DXL5000 Digital Microwave System (DXL5000).
This chapter is intended to complement information contained in
the “Operation” Chapter on page 2-1.
The descriptions in this chapter assume you are already familiar
with the information contained in Chapter 2. We recommend you
review that chapter before beginning to read this one.
Here are the topics covered:
6.2 System Architecture
6.2.1 General
The DXL5000 System is designed to provide a cost effective,
highly reliable, microwave link for long and medium haul
applications, including Studio-to-Transmitter Links (STL) and
Transmitter-to Studio Links (TSL), multi-hop and multi-channel
broadcast, Community Antenna Television (CATV), Standard
Topic Page
System Architecture 6-1
General 6-1
DXL5000 Transmitter 6-1
DXL5000 Receiver 6-1
DXL5000 Transmitter and Receiver Software 6-4
Definition Television (STD), High Definition Television (HDTV),
and Analog Television (ATV) video system networks.
The DXL5000 System provides broadcast high quality digital
format video transmission under Single Carrier Modulation
(SCM) scheme. The System can be configured as either a
simplex or duplex system.
The DXL5000 System consists of a digital microwave
Transmitter and a digital microwave Receiver to provide
microwave digital video or data transmissions.
6.2.2 DXL5000 Transmitter
The DXL5000 Transmitter is a digital mode transmitter that
accepts transport data streams or an external modulated IF
signal. The input data streams are combined and are modulated
onto the IF signal using SCM technology. The modulated IF
signal (or bypassed external IF signal) is then up-converted to
the radio frequency (RF) required and is transmitted through the
antenna.
A functional block diagram of the DXL5000 Transmitter is
provided in Figure 6-1 on page 6-2.
6.2.3 DXL5000 Receiver
The DXL5000 Receiver is a digital mode receiver that receives
RF signals from the antenna and down-converts the RF signals
to 70 MHz IF. The original data streams become outputs from
the Receiver using SCM technology. Bypassed IF is also
available at the output.
A functional block diagram of the DXL5000 Receiver is provided
in Figure 6-2 on page 6-3.
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