Abstract: A method for performing a radiated two-stage method measurement on a device under test having a predefined number of antennas, comprising: placing the device under test on a positioner; establishing communication with the device under test using at least one link antenna; and measuring the antenna pattern of the device under test using a plurality of measurement antennas, wherein the plurality of measurement antennas comprise a number of measurement antennas being larger than the number of antennas of the device under test. Further, a measurement setup is shown.

Abstract: A mobile radio testing device for protocol testing of a device under test is provided. The mobile radio testing device comprises a downlink path and an uplink path, wherein the uplink path comprises at least a first analysis mode and a second analysis mode. In this context, the mobile radio testing device includes a demodulation processing unit for analyzing signals from the device under test in the first analysis mode. In addition, the second analysis mode analyzes signals from the device under test without using the demodulation processing unit.

Abstract: A mobile radio testing device for protocol testing of a device under test is provided. The mobile radio testing device comprises a downlink path and an uplink path, wherein the uplink path comprises at least a first analysis mode and a second analysis mode. In this context, the mobile radio testing device includes a demodulation processing unit for analyzing signals from the device under test in the first analysis mode. In addition, the second analysis mode analyzes signals from the device under test without using the demodulation processing unit.

Abstract: A method for performing a radiated two-stage method measurement on a device under test having a predefined number of antennas, comprising: placing the device under test on a positioner; establishing communication with the device under test using at least one link antenna; and measuring the antenna pattern of the device under test using a plurality of measurement antennas, wherein the plurality of measurement antennas comprise a number of measurement antennas being larger than the number of antennas of the device under test. Further, a measurement setup is shown.

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 test unit for testing a plurality of communications devices is provided. The test unit comprises a test case database, which stores a first test case (including a first test case idle time) and a second test case. The second test case is shorter than the first test case idle time. The test unit comprises a signaling unit. The test unit comprises a test case execution manager, which reads from the test case database the first and second test case and controls the signaling unit to perform measurements according to the first test case on the first device under test until a beginning of the first test case idle time, and controls the signaling unit to perform measurements according to the second test case on the second device under test during the first test case idle time.

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 test unit for testing a plurality of communications devices is provided. The test unit comprises a test case database, which stores a first test case (including a first test case idle time) and a second test case. The second test case is shorter than the first test case idle time. The test unit comprises a signaling unit. The test unit comprises a test case execution manager, which reads from the test case database the first and second test case and controls the signaling unit to perform measurements according to the first test case on the first device under test until a beginning of the first test case idle time, and controls the signaling unit to perform measurements according to the second test case on the second device under test during the first test case idle time.

Abstract: The invention relates to a test device for testing the transmission quality of radio devices by integrating a noise generating device in the transmission chain of the test device. To this end, data to be transmitted are imaged on individual partial data streams modulated onto signals associated with the partial data streams and having different carrier frequencies. At this point in the transmission chain, a noise proportion for at least a part of the signals is added to one signal each of a carrier frequency, in order to allow frequency-selective control of the noise proportions added to the signals of the carrier frequencies. The resulting noisy signals and non-noisy signals of the carrier frequencies are transmitted by a transmission device, and a response signal sent back by a radio device to be tested is received by a receiving device. An analysis device evaluates the received response signal.

Abstract: The invention relates to a device and to a method for testing a mobile radio device in a multiple antenna system using a frequency-selective static channel model for channel simulation in frequency space. In the method according to the invention, the useful data to be transmitted are first allocated to a plurality of carrier frequencies and the associated coding parameters per antenna. The useful data are then modulated onto the carrier frequencies according to the allocation. One or more modulated carrier signals are now distorted in frequency space according to a frequency-selective static channel model. A transmission signal composed of the channel-modeled modulated carrier signals is subsequently transmitted in the period of time to a mobile radio device to be tested.

Abstract: The invention relates to a device and to a method for testing a mobile radio device in a multiple antenna system using a frequency-selective static channel model for channel simulation in frequency space. In the method according to the invention, the useful data to be transmitted are first allocated to a plurality of carrier frequencies and the associated coding parameters per antenna. The useful data are then modulated onto the carrier frequencies according to the allocation. One or more modulated carrier signals are now distorted in frequency space according to a frequency-selective static channel model. A transmission signal composed of the channel-modeled modulated carrier signals is subsequently transmitted in the period of time to a mobile radio device to be tested.

Abstract: The invention relates to a test device for testing the transmission quality of radio devices by integrating a noise generating device in the transmission chain of the test device. To this end, data to be transmitted are imaged on individual partial data streams modulated onto signals associated with the partial data streams and having different carrier frequencies. At this point in the transmission chain, a noise proportion for at least a part of the signals is added to one signal each of a carrier frequency, in order to allow frequency-selective control of the noise proportions added to the signals of the carrier frequencies. The resulting noisy signals and non-noisy signals of the carrier frequencies are transmitted by a transmission device, and a response signal sent back by a radio device to be tested is received by a receiving device. An analysis device evaluates the received response signal.

Abstract: 1.

Abstract: The invention relates to a frequency converter for converting a digital baseband signal (2) having a first frequency (0 Hz) into an analog output signal (8), which is centered around a second frequency (fz, f1+fz, f2+fz), which is switched in rapidly successive frequency jumps, and to a corresponding method. In order to improve the performance of the frequency converter with regard to the rapid switching of the transmission frequency (fz, f1+fz, f2+fz), it is proposed to provide the frequency converter with a digital mixer (9), which transforms the digital baseband signal (2) fed to it to a low intermediate frequency (f1, f2), a D/A converter (3) for converting the baseband signal (4) supplied by the digital mixer (9) into an analog bandpass signal (6), and an analog mixer (7), which transforms the analog bandpass signal (6) with a predetermined constant factor (fz) into a real bandpass signal (8) which is centered around the transmission frequency (fz, f1+fz, f2+fz).

Abstract: 1.

Abstract: Digital modem for data exchange between a data distribution unit (2) and at least one receiver (3, 4) which can be connected to the digital modem (1) with: a user-data forward signal path (17) for the transmission of user data from the television-data distribution unit (2) to the receiver (3, 4) over broadband user-data forward transmission channels,