Company History

SRS was founded in 1985 with the aim of developing powerful radio systems with distinctly smaller dimensions and lower price than the established systems. Through consistent appli­cation of the not yet widely used SMD technology SRS has succeeded in developing very small components and devices (Fig.1 is a UHF transmitter of miniature design from 1990). Thermal treatment of components and boards, conformal coating and burn-in as well as casting tech­niques perfected after long trials were a prerequisite for highly reliable and rugged devices such as the telemetry for the landing gear of the Eurofighter Typhoon prototypes.

The development of a UHF Diversity re­ceiv­er with 160 kHz baseband response and a resulting 320 kBit NRZ data channel al­lowed fast and highly reliable wireless links under the most difficult operating conditions, such as telemetry from the helicopter rotor or use in automotive test tracks. For example the testing of AntiLock Braking Systems (ABS) became much easier using this radio link instead of a heavy test rack replacing the passenger seat.

The experience from this period resulted in a modular, standardized product line, con­sisting of transmitters, amplifiers, receivers (1-channel and diversity) and special equip­ment such as flight-termination systems. The front panel is always similar, and the pin assignment is largely standardized: power, digital and analog signals and interfaces are on the same pin numbers, so that a single adapter cable can be used for programming all types of devices. The standardized form factor also facilitates customer planning: of devices for different frequencies and data rates, etc., as they always have identical dimensions and connections.