4 Digital Reprogrammable Software Radios R&S M3SR
or
Radio modules
Power modules
RX
Synthesizer
EPM
processor
Radio basis
Radio module bus (RMB)
Standard I/O
Guard
receiver
incl. DC
power supply
AC/DC
power
supply
Radio control and signal processing
Local
control
panel
Backplane
Audio front panel with fill gun connector
Interface cards
TX
Block diagram of R&S M3SR
Internal AC/DC Power Supply
R&S IN4400A
The R&S IN4400A is the internal AC/DC
power supply required for receiver and
multireceiver radio types. Its submodules
are an AC/DC converter and a DC/DC con-
verter. The AC/DC converter delivers DC
from the external mains supply. The R&S
IN4400A occupies the slot assigned to
the transmitter module. The external
Universal Power Supply R&S IN4000A is
required for transceivers or transmitters.
Local control panel
A local control panel can be integrated in
the front of the Radio Basis R&S KR4400.
If a local control panel is not required, a
blank panel is fitted instead.
Comfort Control Panel (CCP)
R&S GB4000C
The ½ 19" plug-in CCP is the standard
control panel and allows easy and conve-
nient local control of the radio. All radio
functions are controlled by the R&S
GB4000C. The 5" display has softkeys and
a user-friendly, menu-guided user inter-
face. The keypad is backlighted by LEDs.
Any additional R&S M3SR units that are
connected can be controlled and moni-
tored from a local control panel.
Interfaces
In addition to the interfaces provided as
standard, interface cards can be inserted.
Six free slots are available for interface
cards. These cards may contain customer-
specific interfaces as well as other func-
tions.
Backplane R&S GH4400
The Backplane R&S GH4400 connects the
optional interface cards and the transmit-
ter module to the radio module bus. This
passive PCB does not occupy a radio
module slot. The Backplane R&S GH4400
is required for every R&S M3SR configu-
ration except receivers, which do not
need interface cards.
Antenna connector configura-
tions
The connector for a combined transmit-
ting/receiving antenna is configured as
standard. Depending on the antennas
used, various connector combinations are
offered. This means that either separate
or combined antenna connectors are
available for main receiver, guard receiver
and transmitter.
Due to the use of a universal wideband
amplifier, only one antenna connector is
required, irrespective of the frequency
range. If separate operation of the VHF
and UHF range is required for special
applications, an external diplexer (e.g.
R&S FT224) has to be used.
Remote control
A variety of standardized interfaces is
available for remote control of the radio
units. An integrated LAN (local area net-
work) hub allows easy integration into
data networks. Any number of radios can
thus be controlled from a central operator
position.
The R&S M3SR radios can be remote-con-
trolled via external remote control units,
other R&S M3SR units with integrated
control panel, Rohde&Schwarz remote
control systems or customer-specific
solutions.
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