Abstract: A radio test system for testing a device under test is described, comprising a signal generation unit configured to generate a downlink signal to be transmitted to the device under test for over-the-air testing. The radio test system has at least one antenna configured to transmit the downlink signal via an over-the-air transmission channel to the device under test. Further, a receiver is provided that is configured to receive a response signal via the over-the-air transmission channel from the device under test. In addition, the radio test system has at least one over-the-air adapter that is connected to the signal generation unit wherein the over-the-air adapter is configured to adapt the downlink signal to be transmitted such that the over-the-air transmission channel is equalized. Further, a method for testing a device under test is described.

Abstract: A method for determining optimum parameters with respect to transmission and/or reflection of a surface is provided. The method comprises the steps of applying the surface to a transformer material in order to form a sample arrangement, and obtaining at least one measurement parameter of electromagnetic relevance with respect to the surface of the sample arrangement with the aid of an electromagnetic excitation signal generated by a measurement equipment. In this context, the transformer material comprises at least two dimensions for varying a contribution of at least one sample parameter of electromagnetic relevance over the surface.

Abstract: A signal correction method for correcting a measured signal has the following steps: processing a digital representation of a first signal at a first measurement input; processing a digital representation of a second signal at a second measurement input corresponding to the first signal convoluted with a transfer function; and determining the transfer function for correcting the measured signal. Further, a use of the method, a system for correcting a measured signal, and an oscilloscope are provided.

Abstract: A method for performing predictive maintenance of an amplifier module is described. At least one parameter of at least one amplifier module is acquired via a measurement data acquisition unit. The at least one parameter acquired is analyzed via a measurement data analyzing unit so as to predict the probability and/or time of default of the at least one amplifier module. Further, a system is described.

Abstract: A method for testing a communication between a mobile device and a satellite system is described, wherein testing signals are generated by using a signal generation unit, said testing signals simulating satellite signals of at least one satellite of said satellite system. Further, said testing signals are received by a device under test being used as said mobile device. Said testing signals simulate at least one of a changing satellite signal strength, a changing satellite signal quality, a changing position of said satellite and more than one satellite signal in parallel. Further, said testing signals simulate a changing position of said mobile device. In addition, a testing system for testing a communication between a mobile device and a satellite system is described.

Abstract: An oscilloscope comprises at least one analog input channel configured to receive and process an analog input signal, at least one digital input channel configured to receive and process a digital input signal, and a trigger unit. Said trigger unit is connected with said at least one analog input channel and said at least one digital input channel. Said trigger unit is configured to detect predetermined trigger events in both said analog input signal and said digital input signal. Said trigger unit further is configured to control data acquisition based on a combination of at least two trigger events detected in said analog input signal and said digital input signal.

Abstract: This application relates to a test chamber for testing a device under test (DUT), the test chamber comprising: a plurality of chamber walls defining an interior of the test chamber which are configured to provide an anechoic and shielded test chamber, an antenna arrangement which is arranged in the form of a plane-wave synthesizing array and which is configured to emit plane-waves into the interior of the test chamber, a receiving area for receiving the DUT, wherein in a test mode the receiving area forms a region of measurement of the DUT, wherein the receiving area is formed by a portion of a first wall of the test chamber and wherein the receiving area is configured such that during test mode heat from the DUT is transferred to the outside of the test chamber. The application further relates to a test system comprising such a test chamber.

Abstract: A signal acquisition of a signal based on specific trigger events is provided. In particular, a separate segment of an input signal is stored for each trigger event. Thus, each trigger event generates separate data comprising data relating to a specific period of time in association with a corresponding trigger event.

Abstract: A method for identifying the noise figure of a device under test is described. A signal generator that outputs the modulated signal, a device under test and an analyzer are provided. The signal generator is connected with the analyzer directly wherein at least two error vector magnitude measurements are performed. The signal generator is connected with the device under test and the device under test is connected with the analyzer wherein at least two error vector magnitude measurements are performed. The noise contribution of the device under test is determined from the error vector magnitude measurements performed. A gain measurement is performed on the device under test. The noise figure of the device under test is calculated based on the noise contribution of the device under test obtained and the gain of the device under test obtained. Further, a measurement system is described.

Abstract: A signal source is described. The signal source comprises a signal generator, a first frequency divider and a second frequency divider. The first and the second frequency divider are each connected to the signal generator. The signal generator is configured to generate a source signal having a source frequency and to selectively forward the source signal to at least one of the first frequency divider and the second frequency divider. The first frequency divider is established as an integer frequency divider and is configured to generate a first output signal from the source signal. The second frequency divider is different from the first frequency divider and is configured to generate a second output signal from the source signal, wherein a phase noise of the second output signal is considerably lower than a phase noise of the first output signal. Moreover, a test system and a method for testing a device under test are described.

Abstract: A test system for testing a device under test that comprises several communication lanes is described. The test system is a communication lane test system that comprises a measurement instrument and a connecting interface for connecting the device under test, wherein the connecting interface is configured to connect at least two of the several communication lanes with the measurement instrument. The measurement instrument comprises a processor being configured to conduct an automatic conformance test on the at least two communication lanes concurrently. Moreover, a method for testing a device under test that comprises several communication lanes is described.

Abstract: A method for determining phase noise in a periodically modulated signal is described. The modulated signal is processed to generate a processed signal from the modulated signal. At least an approximate period of a modulation of the modulated signal is determined from the processed signal. The type of modulation of the modulated signal is determined from the processed signal. The modulated signal is demodulated based on the determined period and the determined type of modulation to generate a demodulated signal, and the phase noise is determined from the demodulated signal. Moreover, a measurement device is described.

Abstract: A measurement system for measuring signals in a RF device comprises at least two signal generators for generating a test signal in each one of the signal generators, a probe for every signal generator, each probe being connected to the respective signal generator for emitting the respective test signal to the RF device, a controllable positioner for rotatably positioning the RF device with respect to the probes, wherein the positioner comprises a mechanical arm with three degrees of freedom, and rods for every probe, wherein each rod is adapted to individually rotate a respective probe around a central fixture, so that the probes are rotatable around a first axis.

Abstract: A measuring system for over the air measurements on a device under test comprises an antenna module with at least one measuring antenna, a positioner, adapted to change a relative position of the device under test and the antenna module, resulting in a relative path of movement of the antenna module with regard to the device under test. Each measuring antenna comprises an integrated power detector diode. Each measuring antenna is adapted to determine at least two power values during the movement along the path of movement.

Abstract: A measuring system has an analog-to-digital converter, an acquisition memory, a processing unit, and a display memory. The processing unit is adapted to decode a digital signal according to a protocol creating a decoded signal and to evaluate the decoded signal at a cursor position. The digital data generated by decoding the decoded signal at the cursor position is stored in the display memory. Further, a method for analyzing an analog signal according to a protocol is shown.

Abstract: A holding device for a device comprises a mounting part, an anchor part which is configured to be fixed to a housing of the device and a locking element which is partially arranged in the mounting part and which is rotatable within a defined angular range from a release position to a locking position in order to fix the anchor part to the mounting part.

Abstract: A method of measuring the AM/PM conversion of a device under test having a local oscillator is described. A device under test with an embedded local oscillator is provided. A signal source is connected to an input of the device under test. A receiver is connected to an output of the device under test. An input signal is provided by the signal source. The input signal has an initial power level. The input signal is input to the device under test. The power level of the input signal is changed. An output signal of the device under test is measured at different power levels of the input signal.

Abstract: A signal processing device is described, with a signal input for receiving an input signal, a first trigger unit generating a trigger signal based upon a first trigger event in the input signal and an acquisition memory for acquiring the input signal at least based upon the trigger signal so as to provide an acquired signal. The signal processing device also comprises a second trigger unit connected to the acquisition memory. The second trigger unit is adapted to process the acquired signal according to a second trigger. The second trigger unit is adapted as a zone trigger unit applying a zone trigger. Further, a method of applying a zone trigger is described.

Abstract: A radio communication system is described, comprising at least a first radio and a second radio, both radios being configured to communicate with each other. The radio communication system has a transmit mode in which an initial signal pattern is transmitted at the beginning of each communication via the first radio. The radio communication system has a receive mode in which the initial signal pattern is received by the second radio. The second radio is configured to derive at least one communication channel parameter and a radio frequency characteristic from the initial signal pattern. Further, a method for determining a radio frequency characteristic is described.

Abstract: A system for determining scattering parameters of a frequency-converting device under test using a network analyzer determines the system errors which occur between the individual ports (1, 2) of the frequency-converting device under test (3) and the ports (4, 5) of the network analyzer (6) connected to the ports (1, 2) of the frequency-converting device under test (3) and measures the system-error-containing signals incoming and outgoing in each case at the individual ports (1, 2) of the frequency-converting device under test (3).