Abstract: A measurement application device includes at least one signal port, at least one measurement unit coupled to the at least one signal port, wherein the at least one measurement unit is configured to process an incoming signal received via the at least one signal port based on at least one of a predefined resolution bandwidth and a predefined video bandwidth, and a signal processor coupled to the at least one measurement unit, wherein the signal processor is configured to determine at least one of the resolution bandwidth and the video bandwidth for the at least one measurement unit based on at least one of a maximum signal level to be measured, and a minimum signal level to be measured. Further, the present disclosure provides a respective method.

Abstract: The object of the invention is to provide a lock-in process and device for a YIG-tuned oscillator which takes into account ageing and hysteresis of the YIG-tuned oscillator. This object is attained in that during a predetermined frequency change, the frequency of the YIG-tuned oscillator (1) is preset by means of a microprocessor (17) that progressively changes the current (I.sub.SP) in the main tuning coil (13) of the YIG-tuned oscillator (1) by an iterative capture routine, until the capture range (.DELTA.FM) of the switched-on frequency-locked loop, which changes with the coil current (I.sub.SP), includes the new operating frequency (f.sub.SET). The switched-on frequency-locked loop then pulls the oscillator frequency into the capture range of the PLL and the PLL locks-in the oscillator frequency to the new operating frequency (f.sub.SET). The microprocessor (17) interrupts the capture routine when a PLL-LOCK detector (11) announces to the microprocessor (17) that the new operating frequency (f.sub.