Abstract: System (10) comprising at least two units (1, 2) with clock functionality, the units being coupled to a common system clock line (SCLK), a common internal clock line (ICLK), and a logic bus (L-BUS), whereby one sole unit (1, 2) is being dedicated as a mater unit at a time. One source clock signal (CLK10, CLK20) of a unit is output on the internal clock line (ICLK) and all PLL devices of all units generates PLL output signals derived from the internal clock signal, the outputs of the PLL devices (CLKP1, CLKP2) being in phase with one another such that switchover from one PLL output signal to another is seamless.

Abstract: The present invention relates to an interface in a Radio Base Station for separating its functionality into a first part, which solely relates to the functionality of the radio network, and a second part, which solely relates to the radio part, i.e. the airborne part of the transmission. The interface provides a minimised bandwidth and comprises one or more user data links for uplink and downlink, a control and supervision link, and a synchronisation link.

Abstract: System (10) comprising at least two units (1, 2) with clock functionality, the units being coupled to a common system clock line (SCLK), a common internal clock line (ICLK), and a logic bus (L-BUS), whereby one sole unit (1, 2) is being dedicated as a mater unit at a time. One source clock signal (CLK10, CLK20) of a unit is output on the internal clock line (ICLK) and all PLL devices of all units generates PLL output signals derived from the internal clock signal, the outputs of the PLL devices (CLKP1, CLKP2) being in phase with one another such that switchover from one PLL output signal to another is seamless.

Abstract: The invention relates to an arrangement for automatic control of a hydraulically operated friction disc clutch with diaphragm spring. The hydraulic operating unit comprises a hydraulic cylinder which, by acting on the diaphragm spring, disengages the friction disc clutch. In order to obtain a hydraulic operating unit in which the regulating pressure is proportional to the disengagement degree of the clutch, the hydraulic cylinder comprises a proportionality-forming spring which acts against the hydraulic cylinder piston during the final part of the disengagement stroke of the piston. In a system with master cylinder and slave cylinder, where the slave cylinder acts on the diaphragm spring for disengagement of the friction disc clutch, the master cylinder is also provided with a pressure supply, compensating for wear of the discs, via a hydraulic channel which is closed off at a predetermined regulating pressure level.