Simoco EMEA Ltd SB2K5354O2O2V Manual De Usuario
SGD-SB2025NT-TUM, Part 1
Jan 12
Page 20
GENERAL DESCRIPTION
4 GENERAL DESCRIPTION
The SB2025 series employs state of the art design and construction methods to deliver a range of
high performance, ultra reliable radio transceivers. They are ideally suited for use in VHF or UHF
two way voice radio systems, however, the SB2025 can perform in a range of applications where
the added advantage of linear frequency and phase response from DC to 3.4 kHz can be utilised.
The SB2025 uses a two-point modulation method synthesiser for extended low-end Voice
Frequency (VF) transmit frequency response. The Receiver, Exciter and Power Amplifier (PA) are
contained in their own specialised aluminium module and can be easily removed from the main
chassis.
high performance, ultra reliable radio transceivers. They are ideally suited for use in VHF or UHF
two way voice radio systems, however, the SB2025 can perform in a range of applications where
the added advantage of linear frequency and phase response from DC to 3.4 kHz can be utilised.
The SB2025 uses a two-point modulation method synthesiser for extended low-end Voice
Frequency (VF) transmit frequency response. The Receiver, Exciter and Power Amplifier (PA) are
contained in their own specialised aluminium module and can be easily removed from the main
chassis.
The flexibility of the SB2025 series allows it to be configured for a wide range of applications.
4.1 P
HYSICAL
D
ESCRIPTION
The SB2025 base station is a compact lightweight standard 19” rack mounting transceiver. It is
designed to mount horizontally in a 19” rack frame and occupies 2U (89mm). The depth of the unit
is 330 mm and the weight is less than 10 kg.
designed to mount horizontally in a 19” rack frame and occupies 2U (89mm). The depth of the unit
is 330 mm and the weight is less than 10 kg.
The unit consists of six main sub assemblies an Exciter Module, a Rx Module, a PA Module, a
Micro Controller Board, and Solar 2 NI and, optionally, a TM unit. These modules are housed in a
fully welded steel case.
Micro Controller Board, and Solar 2 NI and, optionally, a TM unit. These modules are housed in a
fully welded steel case.
The SB2025 base stations feature a high degree of Radio Frequency Interference (RFI) and
Electro-Magnetic Interference (EMI) screening throughout the design and construction. The Rx
and Exciter (low power Tx) modules are contained in solid aluminium enclosures and, for additional
screening, each interface pin in the modules is individually filtered. The PA module is contained in
a special compact efficient extrusion for minimum harmonic radiation. This design results in low
conducted and radiated emissions and minimal susceptibility to RFI and EMI.
Electro-Magnetic Interference (EMI) screening throughout the design and construction. The Rx
and Exciter (low power Tx) modules are contained in solid aluminium enclosures and, for additional
screening, each interface pin in the modules is individually filtered. The PA module is contained in
a special compact efficient extrusion for minimum harmonic radiation. This design results in low
conducted and radiated emissions and minimal susceptibility to RFI and EMI.
User interface is via the front and rear panels. The rear panel provides access to all connectors
and the standard front panel provides six Light Emitting Diode (LED) indicators of the radio status.
and the standard front panel provides six Light Emitting Diode (LED) indicators of the radio status.
For reference purposes, the top and rear views of a typical SB2025NT are shown overleaf in
Figure 1.
Figure 1.
In Figure 1, the main modules and Printed Circuit Boards (PCBs) are numbered and refer to the
following:
following:
1.
Rx Module.
8.
Rear Panel Ethernet PCB.
2.
Exciter Module.
9.
Power Distribution and LED PCB.
3.
T36 Option – Tx Reference Oscillator.
10.
Environment PCB.
4.
Micro Controller PCB.
11.
Management PCB.
5.
Network Interface PCB.
12.
Switch PCB.
6.
Compact Flash Adapter PCB.
13.
Power Amplifier.
7.
Pico ITX Motherboard.