LNA-2GHz
Low Noise Amplifier
MANUAL
Dear Customer,
We would like to thank you for choosing this equipment and welcome you to
the SVP’s growing family of products.
We are sure that the addition of this equipment to your existing installation
will cause you nothing but satisfaction.
Please read these instructions carefully, and keep them at hand in case you
have to refer to them.
LNA - Low Noise Amplifier for COFDM Signals
LNA – Low-Noise Amplifier
MANUAL V5
IMPORTANT NOTES:
1. The LNA low noise preamplifier for COFDM signals has a selective input
filter, which can be modified under request of the customer in order to
work in the wanted frequency range.
2. The COFDM low noise preamplifier is powered through the output coax
connector. For it, a bias insertion tee (BIAS-TEE) can be used, which is
an accessory available in our catalogue.
3. The high performance of this equipment is only guaranteed using high
quality cables and connectors.
COFDM reception Low Noise Preamplifier
LNA – Low-Noise Amplifier
MANUAL V5
Contents
1 Description ................................................................................... 5
2 Technical Specifications ................................................................. 6
3 Electronics Diagram ....................................................................... 8
4 Frequency Response ...................................................................... 9
List of Figures
Figure 3.1 COFRDM Low Noise Preamplifier’s electronics diagram ............. 8
Figure 4.1 COFDM Low Noise Preamplifier’s frequency response (1) .......... 9
Figure 4.2 COFDM Low Noise Preamplifier’s frequency response (2) ......... 10
List of Tables
Table 2.1 RF Specifications .................................................................. 6
Table 2.2 Power Supply Specifications ................................................... 6
Table 2.3 Consumption ........................................................................ 6
Table 2.4 Physical Characteristics ......................................................... 6
Table 2.5 Environmental conditions ....................................................... 7
COFDM reception Low Noise Preamplifier
LNA – Low-Noise Amplifier
MANUAL V5
1 Description
The very low noise preamplifier for COFDM signals offers its best
performance with COFDM digital links. Also, it can be used with analogue
links. This LNA is very useful for Broadcast applications and air links.
This equipment expands the possibilities of existing COFDM digital links,
because with it, the noise figure of the receivers is improved. The selectivity
is also increased and it compensates the attenuation caused by the coaxial
cable between the antenna and the receiver.
It has two radiofrequency filters: one selective at the input with 5 poles,
which enables it to work in the most adverse radiofrequency environments
and other between the amplifier’s stages.
The COFDM low noise preamplifier uses PHEMT technology and 90º hybrid
couplers to ensure excellent linearity. The third order intermodulation
products (IP3) are +33 dBm, which means they have no problem working
with strong COFDM signals modulated in 64QAM.
The LNA preamplifier for COFDM signals has an excellent noise figure and
so, link sensitivity is increased, thus improving coverage and reliability.
It has a good input adaptation, eliminating undesired self-oscillations.
The LNA is powered through the output coax. For it, a bias insertion tee
(BIAS-TEE) can be used.
COFDM reception Low Noise Preamplifier
LNA – Low-Noise Amplifier
MANUAL V5
2 Technical Specifications
RF Specifications
Table 2.1 RF Specifications
Item
Specification
Frequency range
2.0 to 2.7 GHz
Noise figure
0,9 dB Typical
Gain
>25 dB
IP3 OUT
+33 dBm Typical
Input return loss
>20 dB (by isolator)
Output return loss
10 dB Typical
Number of filter poles
5
Static protection
Yes
Power Supply
Table 2.2 Power Supply Specifications
Item
Specification
Power range
10 to 30 VDC
DC Connector
RF output Connector (N connector)
Consumption
Table 2.3 Consumption
Item
Specification
DC Current
250 mA
Physical Characteristics
Table 2.4 Physical Characteristics
Item
Specification
Size
137 x 126 x 30 mm
Weight
1 kg
COFDM reception Low Noise Preamplifier
LNA – Low-Noise Amplifier
MANUAL V5
Environmental Conditions
Table 2.5 Environmental conditions
Item
Specification
Rango de temperatura de
funcionamiento
-10ºC a 55ºC
COFDM reception Low Noise Preamplifier
LNA – Low-Noise Amplifier
MANUAL V5
3 Electronics Diagram
Figure 3.1 COFRDM Low Noise Preamplifier’s electronics diagram
COFDM reception Low Noise Preamplifier
LNA – Low-Noise Amplifier
MANUAL V5
4 Frequency Response
Figure 4.1 COFDM Low Noise Preamplifier’s frequency response (1)
COFDM reception Low Noise Preamplifier
LNA – Low-Noise Amplifier
MANUAL V5
Figure 4.2 COFDM Low Noise Preamplifier’s frequency response (2)
LNA – Low-Noise Amplifier
MANUAL V5
NOTES:
LNA – Low-Noise Amplifier
MANUAL V5
End note
At SVP Broadcast Microwave S.L. we make a constant effort to continuously
improve our equipments and models. For that reason, please understand
that there may be some changes in design, equipment and technology.
Therefore, we cannot be held liable for the data, figures and descriptions
given in this datasheet.
The datasheet’s text, figures and standards are based on the information
we had when the datasheet was published.
Reprinting, reproduction and translation of all or part of this datasheet is
forbidden without written permission by SVP Broadcast Microwave S.L.
SVP Broadcast Microwave S.L. reserves all copyrights.
All right to make changes are reserved.
SVP Broadcast Microwave reserves the right to make changes to
this user’s guide and the device without prior warning.
C/Zubiaurre 7 bajo
48215 Iurreta
Vizcaya – España
Tel-34-94620 3722
info@svpbm.com
www.svpbm.com
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