Abstract: A system, method and computer program product for approval and allocation of costs in electronic procurement is described, wherein approval and allocation of costs are made in response to an electronic invoice, which includes information used to allocate procurement costs to one or more cost centers.

Abstract: Pulses of high-frequency signals (HFS) with different power levels (P1 . . . n) are generated using a first control element (2) for adjusting a power level (P1 . . . n) of a pulse plateau (BP1 . . . N), and a second control element (3) for adjusting a number of level values (PW1 . . . n, PW′1 . . . n) for forming the respective pulse edge (PF1 . . . N) Using an attenuator (2) as a first control element, the power (PN) of a burst (BPN) of the high-frequency signal (HFS) can be adjusted with high precision in small defined power steps, e.g. in a 2-dB tuning lock (ramping), within a time division multiple access system(TDMA) from one time division (Zm) to the next time division (ZM+1). Furthermore, the rate of change of the burst or of each burst (BPN) can be controlled by means of the second control element in the form of a controllable amplifier, so that an admissible interference spectrum is kept and interferences through spurious radiation are avoided.