Abstract: A method for equalizing an input signal is described. The method includes the steps of receiving an input signal; sampling the input signal with a pre-defined sampling rate, thereby obtaining a sampled signal; applying a decimating filter to the sampled signal, which results in a decimated signal having a reduced sampling rate; and applying a digital filter to the decimated signal, thereby obtaining a filtered signal having an at least partially corrected frequency response. Further, an equalization apparatus for equalizing an input signal is described. The equalization apparatus comprises an input for receiving an input signal and an electronic circuit configured for sampling the input signal with a pre-defined sampling rate, applying a decimating filter to the sampled signal, and applying a digital filter to the decimated signal, thereby obtaining a filtered signal having an at least partially corrected frequency response.

Abstract: A method for measuring an impedance of an active device under test is described. The method includes: transmitting a test signal to an active device under test; receiving a signal from the active device under test, wherein the signal includes a reflection of the transmitted test signal; and performing a clock data recovery on the signal received from the active device under test.

Abstract: A signal processing circuit includes a first signal processing channel and a second signal processing channel. The first signal processing channel includes an ADC. The first ADC is configured to digitize an RF signal, thereby obtaining a first digitized RF signal. The second signal processing channel includes a second ADC. The second ADC is configured to digitize the RF signal, thereby obtaining a second digitized RF signal. A clock distribution circuit is configured to forward a first clock signal to the first ADC and to forward a second clock signal to the second ADC. An averaging circuit is connected to both the first signal processing channel and the second signal processing channel. The averaging circuit is configured to determine a combined average of the first digitized RF signal and of a complex conjugate of the second digitized RF signal, thereby obtaining a complex-valued average signal.

Abstract: An instrument for measuring differential signals includes a plurality of pairs of input channels and a real-time circuit. The plurality of pairs of input channels each include two input channels configured to receive a plurality of analog input signals. The real-time circuit includes a plurality of pairs of analog-to-digital converters (ADCs), and a real-time processing circuit. Each of the plurality of pairs of ADCs is allocated to one of the pairs of input channels, and is configured to digitize one of the analog input signals for obtaining a digitized input signal. The real-time processing circuit has a first operational mode and a second operational mode. The real-time processing circuit is configured to process digitized signals of a single pair of ADCs in the first operational mode and is configured to process the digitized signals of two different pairs of ADCs in the second operational mode.

Abstract: The present invention provides to a processing of data samples by an arrangement comprising a signal processing chip for executing predetermined operations and a processor for executing any kind of software code. In particular, it is not only possible that the general purpose processor, which executes the software code can process results from the signal processing chip, but also the signal processing chip can receive the results of the general purpose processor for applying further operations. In this way, the flexibility and efficiency of the processing can be further improved.

Abstract: The present disclosure provides a main measurement device for simultaneously measuring signals with at least one secondary measurement device, the main measurement device comprising a reference signal output port configured to couple to the at least one secondary measurement device, a reference signal generator coupled to the reference signal output port and configured to generate a reference signal, a measurement port configured to receive a signal to be measured, a trigger output port configured to couple to a trigger input port of the at least one secondary measurement device and to output a trigger signal, and a controllably switchable internal signal path configured to selectively couple the reference signal generator with the measurement port. Further, the present invention discloses a respective secondary measurement device, a respective measurement system, and a respective method.

Abstract: A signal analyzer for analyzing a signal includes a frontend with at least two interleaved digitizers configured to digitize an input signal, thereby generating a digitized input signal. The signal analyzer also includes a first interleave alignment filter established by a hardware interleave alignment filter that is configured to hardware-compensate non-ideal effects of the frontend in the digitized input signal in real-time, thereby generating a hardware-compensated, digitized input signal. Further, the signal analyzer includes an acquisition memory configured to store the hardware-compensated, digitized input signal, thereby acquiring an acquired signal. Moreover, the signal analyzer includes a second interleave alignment filter configured to fine-compensate further non-ideal effects of the frontend in a post-processing of the acquired signal.

Abstract: The present disclosure provides a main measurement device for simultaneously measuring signals with at least one secondary measurement device, the main measurement device comprising a reference signal output port configured to couple to the at least one secondary measurement device, a reference signal generator coupled to the reference signal output port and configured to generate a reference signal, a measurement port configured to receive a signal to be measured, a trigger output port configured to couple to a trigger input port of the at least one secondary measurement device and to output a trigger signal, and a controllably switchable internal signal path configured to selectively couple the reference signal generator with the measurement port. Further, the present invention discloses a respective secondary measurement device, a respective measurement system, and a respective method.

Abstract: The present invention provides to a processing of data samples by an arrangement comprising a signal processing chip for executing predetermined operations and a processor for executing any kind of software code. In particular, it is not only possible that the general purpose processor, which executes the software code can process results from the signal processing chip, but also the signal processing chip can receive the results of the general purpose processor for applying further operations. In this way, the flexibility and efficiency of the processing can be further improved.

Abstract: A signal analyzer for analyzing a signal comprises a frontend with at least two interleaved digitizers configured to digitize an input signal, thereby generating a digitized input signal. The signal analyzer also comprises a first interleave alignment filter established by a hardware interleave alignment filter that is configured to hardware-compensate non-ideal effects of the frontend in the digitized input signal in real-time, thereby generating a hardware-compensated, digitized input signal. Further, the signal analyzer comprises an acquisition memory configured to store the hardware-compensated, digitized input signal, thereby acquiring an acquired signal. Moreover, the signal analyzer comprises a second interleave alignment filter configured to fine-compensate further non-ideal effects of the frontend in a post-processing of the acquired signal. In addition, a method of analyzing a signal is described.

Abstract: A method for measuring at least one signal with a digital oscilloscope according to the invention acquires sampled values of the at least one signal in individual time ranges which are each defined in relation to a trigger time of a trigger event, which is detected in the at least one signal in each case by the digital oscilloscope. A post-processing of the sampled values acquired in each case in the individual time ranges then takes place. According to the invention, the acquisition and the post-processing are implemented in parallel.

Abstract: The equalization filter implements an equalization of at least one signal distorted by a measurement setup. The filter coefficients of the equalization filter can be determined by minimizing a cost function K in which only sequences of filter coefficients which exert significant influence on the equalization are taken into consideration.

Abstract: The invention relates to a measuring device for measuring a high-frequency signal and a method for correcting a high-frequency signal superposed with measurement errors by means of the measuring device. The measurement is a time-domain measurement in real-time. The measuring device provides a measurement-signal input, an analog digital converter and a processing unit, wherein the measurement-signal input is connected to a device under test in order to measure the high-frequency signal. According to the invention a deembedding unit is arranged in the signal path of the measuring device between analog-digital converter and the processing unit in order to compensate measurement errors resulting from the connection of devices under test and measuring devices.

Abstract: A method for measuring at least one signal with a digital oscilloscope according to the invention acquires sampled values of the at least one signal in individual time ranges which are each defined in relation to a trigger time of a trigger event, which is detected in the at least one signal in each case by the digital oscilloscope. A post-processing of the sampled values acquired in each case in the individual time ranges then takes place. According to the invention, the acquisition and the post-processing are implemented in parallel.

Abstract: A method for measuring at least one signal with a digital oscilloscope according to the invention acquires sampled values of the at least one signal in individual time ranges which are each defined in relation to a trigger time of a trigger event, which is detected in the at least one signal in each case by the digital oscilloscope. A post-processing of the sampled values acquired in each case in the individual time ranges then takes place. According to the invention, the acquisition and the post-processing are implemented in parallel.

Abstract: The equalisation filter implements an equalisation of at least one signal distorted by a measurement setup. The filter coefficients of the equalisation filter can be determined by minimising a cost function K in which only sequences of filter coefficients which exert significant influence on the equalisation are taken into consideration.

Abstract: The invention relates to a measuring device for measuring a high-frequency signal and a method for correcting a high-frequency signal superposed with measurement errors by means of the measuring device. The measurement is a time-domain measurement in real-time. The measuring device provides a measurement-signal input, an analog digital converter and a processing unit, wherein the measurement-signal input is connected to a device under test in order to measure the high-frequency signal. According to the invention a deembedding unit is arranged in the signal path of the measuring device between analog-digital converter and the processing unit in order to compensate measurement errors resulting from the connection of devices under test and measuring devices.

Abstract: A device for the automatic adjustment of a gain and/or attenuation factor of several amplification or attenuation elements connected in a cascade comprises respectively a detector for measuring a signal level of a signal disposed at the input of the respective amplification or attenuation element and respectively a downstream control unit for determining the gain and/or attenuation factor respectively associated with each amplification or attenuation element. The control unit is a forward control unit for determining the gain and/or attenuation factor respectively associated with each amplification or attenuation element dependent upon the measured signal level of the signal disposed at the input of each amplification or attenuation element.

Abstract: A method for measuring at least one signal with a digital oscilloscope according to the invention acquires sampled values of the at least one signal in individual time ranges which are each defined in relation to a trigger time of a trigger event, which is detected in the at least one signal in each case by the digital oscilloscope. A post-processing of the sampled values acquired in each case in the individual time ranges then takes place. According to the invention, the acquisition and the post-processing are implemented in parallel.

Abstract: A method for marking a signal edge, which has been removed from at least one decimated binary signal after the decimation of an associated binary signal, within the decimated binary signal, establishes successive signal portions of the respective binary signal, in each case with a number of sampled values corresponding to a decimation factor of the decimation. It detects a signal edge removed through decimation from each signal portion if the number of signal edges determined in each signal portion of the respective binary signal is greater than one. Then, the sampled values of the respective decimated binary signal are determined through decimation of the sampled values of the associated binary signal with the decimation factor, and the removed signal edge at the sampling time of the decimated binary signal which corresponds to the signal portion of the associated binary signal with the signal edge removed through decimation is marked.