Abstract: The invention relates to a signal analyzer, comprising a signal receiving unit configured to receive a signal, in particular a radio frequency (RF) signal, a digitizing unit configured to digitize the received signal, and a trigger detection unit configured to detect a trigger event in the digitized signal. The signal analyzer further comprises an acquisition unit configured to store a segment of the digitized signal in a memory of the signal analyzer if the trigger detection unit detects the trigger event in the digitized signal, and an anomaly search unit configured to analyze the stored segment of the digitized signal in order to detect signal anomalies, in particular glitches, in the stored segment of the digitized signal.

Abstract: An electronic instrument is described. The electronic instrument includes a transmitter circuit, wherein the transmitter circuit is configured to transmit a test signal to a device under test. The electronic instrument further includes a receiver circuit, wherein the receiver circuit is configured to receive an output signal from the device under test. The electronic instrument further includes a processing circuit, wherein the processing circuit is configured to determine at least one signal quality indicator based on the output signal received from the device under test. The at least one signal quality indicator is indicative of a signal quality of the output signal. Further, a signal analysis method of analyzing a signal received from a device under test is described.

Abstract: This disclosure relates to a radio frequency receiver for performing uninterrupted observation of all signals within an operating frequency range. The receiver includes an antenna(s), a splitter(s) to receive an analog input signal from the antenna(s) and to split the analog input signal into at least two analog signals corresponding to at least two frequency bands within an operating frequency range of the receiver, and a signal conversion block operably coupled to the splitter(s), to receive the at least two analog signals simultaneously or quasi-simultaneously. The signal conversion block includes analog-to-digital converters configured to digitize the respective at least two analog signals, thereby generating at least two digitized signals. The signal conversion block includes digital down converters respectively coupled to the analog-to-digital converters, to operate on at least one of the at least two frequency bands and further to down convert the respective at least two digitized signals.

Abstract: The present invention relates to an airborne communication apparatus for or within an aircraft, a corresponding airborne communication system and a method of providing secure communication to and from the aircraft. The present invention is based on the concept of providing a redundant communication link from the ground station to the aircraft. The redundant communication link comprises a first communication link and at least a second different communication link, of which the first one is a conventional analogue communication link and the second one is a VoIP-based communication link. Due to the communication redundancy, the communication becomes more secure since the existence of a dual connection increase the availability of the communication link significantly.

Abstract: A test arrangement and a method for controlling a measurement apparatus are provided. The measurement apparatus, in particular the triggering of the measurement apparatus is controlled by a state machine. If a desired state for triggering the measurement apparatus is not entered within a predetermined time period, the conditions for triggering the measurement apparatus can be adapted. For example, a required state for triggering can be changed or an automated triggering can be initiated.

Abstract: A signal processing circuit for a measurement instrument is described. The signal processing circuit includes an analysis circuit, a measurement input, and at least two parallel measurement channels. The parallel measurement channels are configured to process the input signal, thereby generating first and second complex-valued measurement signals. The analysis circuit is configured to determine first and second error quantities associated with the first and second complex-valued measurement signals, respectively. The analysis circuit is configured to determine a complex-valued average signal corresponding to a combined average of the first and second complex-valued measurement signals. The analysis circuit is configured to determine a combined error quantity based on the complex-valued average signal. The analysis circuit is configured to determine a comparison quantity based on the combined error quantity as well as based on the first error quantity and/or the second error quantity.

Abstract: A detector circuit for a measurement instrument is described. The detector circuit includes a first signal input, a second signal input, and an averaging sub-circuit. The first signal input is configured to receive a first complex-valued measurement signal associated with an input signal received from a device under test. The second signal input is configured to receive a second complex-valued measurement signal associated with the input signal received from the device under test. The averaging sub-circuit is configured to determine an average of the first complex-valued measurement signal and of a complex conjugate of the second complex-valued measurement signal over a predetermined number of samples, thereby obtaining a complex-valued average signal. The averaging sub-circuit is configured to generate an output signal based on the complex-valued average signal. Further, a signal processing circuit and a measurement instrument are described.

Abstract: A phase noise measurement method of measuring phase noise of a device under test is described. The phase noise measurement method includes the steps of: determining, by a measurement circuit, measurement IQ data based on an output signal of a device under test; setting, by a control circuit, a magnitude threshold; determining, by an analysis circuit, critical samples of reference IQ data for which a magnitude of a reference signal is smaller than the magnitude threshold; discarding the critical samples of the reference IQ data and corresponding critical samples of the measurement IQ data, thereby obtaining modified reference IQ data and modified measurement IQ data; and determining, by the analysis circuit, a phase noise spectrum of the output signal of the device under test based on the modified reference IQ data and based on the modified measurement IQ data. Further, a measurement system is described.

Abstract: The present disclosure relates to a device for simulating a battery of a device-under-test (DUT), comprising a battery simulation unit adapted to fit into a battery reception unit of the DUT; and a controller configured to control the battery simulation unit to simulate electrical characteristics of a battery; wherein the battery simulation unit is configured to supply electrical power to the DUT or drain electrical power from the DUT based to the simulated electrical characteristics. The device further comprises a temperature sensor configured to measure a temperature at or in the battery simulation unit; and a heater unit configured to heat the battery simulation unit.

Abstract: The invention relates to a measurement instrument, such as an oscilloscope, comprising a measurement unit adapted to receive an input signal, and a processing unit adapted to classify the input signal, preferably based on signal parameters or characteristics of the input signal. wherein the processing unit is adapted to determine a signal analysis category for the input signal based on said classification of the input signal, and to match the determined signal analysis category to a control configuration, which defines settings and/or configurations of the measurement instrument, based on an adjustment function.

Abstract: A device for generating training data sets for signal type recognition has at least one radio frequency signal generator for generating at least one artificial radio frequency signal, a radio frequency receiver connected to the at least one radio frequency signal generator for receiving the at least one artificial radio frequency signal generated by the at least one radio frequency signal generator, and a signal data recorder connected to the radio frequency receiver for storing the radio frequency signal received by the radio frequency receiver as a training data set. Further, a method for generating training data sets as well as a training data set are provided.

Abstract: The invention provides an analysis of a Bluetooth Low Energy implementation by measuring a packet error rate (PER) on a communication channel between the BLE implementation and a test device.

Abstract: Method, system and probe for visualizing measured values of an electromagnetic parameter of a PCB. A probe head of a probe contactless measures values of at least one electromagnetic parameter at at least two different positions of the PCB, a camera fixed in position relative to the probe head records for each of the different positions an image of an area of the PCB around the probe head, for each of the different positions, the measured value of the electromagnetic parameter is correlated with the recorded image of the area of the PCB around the probe head, a location of each of the recorded images of the areas on a map representation of the PCB is determined, the map representation of the PCB with the measured values of the electromagnetic parameter, and the map representation of the PCB is visualized together with the superimposed measured values of the electromagnetic parameter.

Abstract: A measurement input circuit for a measurement device for measuring an electric signal in a device under test comprises a signal input that receives the electronic signal from the device under test and provides the received electronic signal at a signal node, a direct signal coupling path that is coupled between the signal node an electrical ground and comprises a first impedance value, an alternating signal coupling path that is coupled between the signal node and the electrical ground, and comprises a second impedance value that is lower than the first impedance value, and a signal output that is coupled to the signal node and outputs the received electronic signal.

Abstract: A method for recovering data included in a digitally modulated signal is described. The digitally modulated signal includes a symbol sequence. The method includes providing a mathematical model of the digitally modulated signal, the mathematical model describing the digitally modulated signal in terms of the symbol sequence and describing the digitally modulated signal in terms of a step response and/or an impulse response, and wherein the mathematical model also takes disturbances into account; and processing the digitally modulated signal based on the mathematical model, thereby recovering the data included in the digitally modulated signal. The disturbances include a random disturbance component modelled as a Gaussian disturbance, and include an inter-symbol interference component modelled as Gaussian noise, and wherein a dependence of the at least one step response on the symbol sequence is neglected within the mathematical model. Further, a measurement instrument and a measurement system are described.

Abstract: Disclosed are a method (1) of and a management entity (23) for optimizing a radio performance of a wireless network (2). The wireless network (2) comprises a plurality (C) of communication channels and a plurality (N) of configurable radio access entities (21). The method (1) comprises determining (11), by a respective configurable radio access entity (21, i) of the plurality of configurable radio access entities (21), a respective set of receivable radio access entities (21, 22, j) in a particular communication channel of the plurality of communication channels. The method (1) further comprises collecting (12), by a management entity (23), the respective set of the receivable radio access entities (21, 22, j) determined by the respective configurable radio access entity (21, i) of the plurality of configurable radio access entities (21, i).

Abstract: A method of training an artificial intelligence circuit is provided. The method includes the steps of providing a training data set, the training data set encompassing training data of a frequency spectrum including a guard band and/or training data concerning a radio frequency power in the guard band, and feeding the training data set into the artificial intelligence circuit to be trained, which processes the training data set in order to learn a standard frequency spectrum and/or a standard radio frequency power in the guard band, thereby enabling the artificial intelligence circuit, when trained, to determine a deviation from the standard frequency spectrum and/or to determine a deviation from the standard radio frequency power in the guard band. In addition, a monitoring method for identifying an anomaly in a radio frequency spectrum as well as a system for monitoring a radio frequency environment are described.

Abstract: A method for radio direction finding using a direction finding system having an antenna, a magnetic field sensor and a control unit, the method comprising: receiving a radio frequency signal of at least one emitter via the antenna by the control unit obtaining a received signal; receiving a magnetic measurement value of the magnetic field at the direction finding system via the magnetic field sensor; correcting the magnetic measurement value obtaining a corrected magnetic measurement value; correcting the received signal obtaining a corrected signal; and determining the precise bearing of the emitter based on the corrected received signal and the corrected magnetic measurement value. Further, a direction finding system and a platform are disclosed.

Abstract: An over-the-air test system for testing a device under test over-the-air is described. The over-the-air test system includes a reflector with a focal point, one center antenna and antenna elements. The center antenna is orientated towards the focal point of the reflector. The antenna elements are symmetrically located around the center antenna. An operational frequency range of the center antenna is different to an operational frequency range of the antenna elements. Further, a method of performing an over-the-air measurement of a device under test by using an over-the-air test system is described.

Abstract: Field probe for conducting antenna measurements by phaseless measurements. An antenna arrangement comprises three or four antennas for measuring RF waves. The measured RF waves are pairwise added and subtracted. Based on the result of the adding and subtracting operations, magnitude patterns and phase patterns are determined. In this way, magnitude and phase patterns of electromagnetic waves emitted by a device under test can be determined by a completely passive device.