UDR-108 Diversity Receiver
MANUAL V0
187
A.2
DC-SW Switchable Down-Converter
A.2.1
Description
The DC-SW switchable down-converter is suitable to work with COFDM digital
links. It translates RF band signals to UHF band. Different down-converter
models are available which can work from 1.2 to 6.0 GHz in bands.
Depending on the DC-COFDM model, the down-converter will be suitable to
convert signals from a concrete frequency range.
The down-converter is designed to work in environments with high
radiofrequency levels. Two band filters prevent the equipment from receiving
and being saturated by strong nearby signals from other services. An input
filter covers the working frequency range.
PHEMT technology and push-pull first stage are used to ensure excellent
linearity. Moreover, the down-converter’s excellent noise figure (less than 1.5
dB) makes reception of weak signals very clear.
The local oscillator frequency is selectable by a switch. In addition, the local
oscillator has an extremely low noise phase and very high frequency stability.
Excellent MER results are obtained in the Receiver. This MER increase due to
the local oscillator´s spectral purity enables increased link coverage,
particularly when there is no direct vision, and modulation is between 16, 64
and 256 QAM.
The LED at the bottom shows the DC-SW presence.
The equipment is powered by the Receiver. It can also be powered using a
Bias-Tee.
The equipment is waterproof. It can work permanently under extreme
weather conditions.
The down-converter is a very important element in COFDM links, which
require maximum signal quality when using 64QAM or 256 QAM modulations.
The maximum fix mast diameter is 100 mm. In the following figure, the
Down-Converter is shown:
Figure A.2: Down-Converter
Summary of Contents for UDR-104
Page 1: ...UDR 108 RECEIVER MANUAL...
Page 13: ...UDR 108 Diversity Receiver MANUAL V0 13 F 2 Technical Specifications 226 Glossary 228...
Page 15: ...UDR 108 Diversity Receiver MANUAL V0 15 Figure 1 1 AM Multisector Antenna connection figure...
Page 19: ...UDR 108 Diversity Receiver MANUAL V0 19 Chapter 3 How to order...
Page 118: ...UDR 108 Diversity Receiver MANUAL V0 118 Figure 6 4 Google Earth example...
Page 143: ...UDR 108 Diversity Receiver MANUAL V0 143 7 1 2 8 UNIT Figure 7 14 Web Server Unit screen...
Page 174: ...UDR 108 Diversity Receiver MANUAL V0 174 9 1 UDR 108 Mechanical Drawing...
Page 175: ...UDR 108 Diversity Receiver MANUAL V0 175 9 2 DC Down Converter Mechanical Drawing...
Page 176: ...UDR 108 Diversity Receiver MANUAL V0 176...
Page 178: ...UDR 108 Diversity Receiver MANUAL V0 178 9 4 AM 206 Antenna Mechanical Drawing...
Page 179: ...UDR 108 Diversity Receiver MANUAL V0 179 9 5 GPS 02 GPS Receiver Mechanical Drawing...
Page 211: ...UDR 108 Diversity Receiver MANUAL V0 211 Figure D 6 AM 204 AM 404 and AM 604 antenna schematic...
