2 Digital Reprogrammable Software Radios R&S M3SR
The R&S M3SR (multiband, multimode
and multirole surface radio) represents an
innovative and versatile generation of
software radios for use in the navy, civil
and military air traffic control, air defence
and stationary applications.
In addition to the R&S M3TR (multiband,
multimode and multirole tactical radio)
and R&S M3AR (multiband, multimode
and multirole airborne radio), the R&S
M3SR is the third element of a new radio
equipment generation. All three feature
functionality that can be varied by means
of software.
For the commercial user, the basic units
come standard with the waveform for air
traffic control (ATC) in line with
EN300676. The R&S M3SR can be used
both in normal ATC operation and as an
emergency backup radio.
The R&S M3SR is interoperable with
many types of existing radio equipment
and standards. For military customers,
this means seamless communication
with their own and allied troops. To com-
municate with neighbouring troops, the
radio is switched to the waveform or
communication protocol used there. This
switchover can be carried out online even
during a mission.
The operational functions and the avail-
able waveforms are determined by the
loaded application software. Additional
functions can be implemented, as
required, by downloading the appropriate
software and/or using plug-in hardware
modules.
Modular design
The R&S M3SR features highly modular
hardware and software architecture. All
R&S M3SR units are based on the uni-
form Radio Basis R&S KR4400. The versa-
tile P
3
I upgrade concept of the basic
version helps to avoid unnecessarily high
initial investment costs.
The R&S M3SR is available as a receiver,
transmitter or transceiver, according to
the customer's requirements.
Radio Basis R&S KR4400
The various models are set up on the
hardware and software of the Radio Basis
R&S KR4400, which forms the central and
common part of all R&S M3SR radios. The
radio basis is independent of the RF-
specific modules. Additional radio-
specific hardware and software modules
define the performance features of the
radio.
The R&S KR4400 consists of the mechan-
ical frame, the radio platform and a front
panel with audio interface, loudspeaker
and status displays. The platform is the
control center of the radio. The embedded
realtime operating system controls and
monitors all functions in the radio. A con-
trol panel (R&S GB4000C) can be inte-
grated for local control of the radios.
The main tasks of the radio basis include:
◆ Monitoring and control of the
complete radio unit
◆ Mechanical and electrical accommo-
dation of modules and control panel
◆ Digital voice and data processing
◆ Internal routing of information data
to the interfaces
◆ Standard interfaces to peripherals
◆ Audio interface, loading of encryp-
tion keys and display of status infor-
mation
An oven-controlled crystal oscillator
(OCXO) is integrated as standard to meet
the stringent requirements regarding
time stability.
For the configuration of the various radio
models, the radio basis is equipped with
slots for the radio modules, and a
mechanical fixture on the side to accom-
modate the transmitter module.
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