SEM 93
The SEM 93 is a software- controlled VHF voice and data radio device . It was developed and manufactured by Thales (formerly SEL / Alcatel ). With the SEM 93 transmission of information is to secrecy NATO Secret possible.
The SEM 93 in the further developed version SEM 93E has been used in the field by the Bundeswehr since August 2001 . The further developed version is more powerful; Among other things, a higher data rate than the basic model can be switched in data radio operation. The use of programmable standard components ( FPGAs ) instead of user-specific integrated circuits (ASICs) freed up a slot in the device.
Structure and connections
The device intended for vehicle installation (supply voltage: 24 volts) is a compact unit that consists of plug-in modules inside. Instead of the base plate, Thales uses a mechanical swing frame. The SEM 93 is also available as SEM 91 , which differs in its design and is only used in helicopters.
The combination of two SEM 93 allows relay operation . The SEM 93 can be integrated into a digital on-board communication system with active noise reduction.
Technical characteristics
The device works in the frequency range 30.000–79.975 MHz in a 25 kHz channel grid ; it has 2,000 channels. The transmitter can be switched to three power levels , namely 0.4 W, 4 W and 40 W at 50 ohms.
The SEM 93 / SEM 93E offers electronic protective measures . In addition to clear (unencrypted) voice and data transmission in single-channel operation (so-called manual selection mode) and in conventional nuclear power plant operation (automatic channel selection), encrypted and deceptive transmission in so-called ECCM nuclear power plant operation and frequency hopping is possible.
The maximum switchable data rate is 9600 bit / s for the SEM 93 and 14400 bit / s for the SEM 93E.
The device has protective measures against the nuclear electromagnetic pulse (NEMP).
System accessories
The SEM 93 / SEM 93E includes the operating instructions generation and management device BEV 93 , which is used to generate and manage crypto variables, frequency hop bundles, nuclear power plant bundles and manual selection frequencies. The BEV 93 can also be used to transmit crypto variables and operating data via radio. The SEM 93 system also includes the BSP 93 operating specifications memory, with which operating specifications and crypto variables can be stored and passed on.
The SEM 93 / SEM 93E can be operated remotely via the wired remote control FB 93 (distance max. 15 m).
compatibility
The SEM 93 / SEM 93E is downwardly compatible with all VHF troop radios that have been introduced to the Bundeswehr to date. In the encrypted manual radio operation, it is interoperable with US troop radios. With an adapter set, the SEM 93 is compatible with PR4G and SINCGARS in all radio operating modes .
Logistic concept
The SEM 93 is service-friendly thanks to its construction with modular plug-in assemblies. It has an integrated self-test facility which, in addition to permanent function monitoring, also offers function tests in the form of a switch-on test and other tests.
Others
In October 2002, Jane’s Defense Industry reported on a contract between Thales and the Federal Office for Defense Technology and Procurement (BWB) for the manufacture and delivery of the third batch of SEM 93. The volume of this contract, which includes the delivery of approximately 1000 SEM 93, Spares and training equipment, Jane's put at € 31 million.
The SEM 93 will u. a. used in the LeFlaSys weapon system .
swell
- ↑ Thales flyer for SEM 93 / 93E / 91 with properties and technical data (PDF; 696 kB)
- ↑ Report on the delivery of the third batch SEM 93 to the Bundeswehr at Jane's (English)