Measurement apparatus and measurement method
AssigneeRohde & Schwarz GmbH & Co. KG
InventorsMarkus FREIDHOF, Andreas MAIER
Life of this patent
Estimating the term…
Abstract
The present invention relates to a processing of digitally measured signals. When sampling a measurement signal with a predetermined sampling rate, aliasing effects may occur, if a Nyquist condition is violated. For this purpose, the present invention suggests to analyze a frequency spectrum of a signal and to compare the frequency components of the spectrum with the setting of a measurement apparatus, in particular a sampling rate of the measurement apparatus. If a measurement signal comprises frequency components which may violate the Nyquist condition, an alert may be generated to adapt the set of the measurement arrangement.
Claims20
A measurement apparatus for digitally measuring a signal, the apparatus comprising:
- an input device adapted to receive a measurement signal;
- a spectrum analyzing device adapted to determine a frequency spectrum of the received measurement signal;
- a signal processing device adapted to process the received measurement signal with a preset sampling rate;
- and
- a control processor adapted to set the sampling rate of the signal processing device, and to determine a position of at least one frequency component of the frequency spectrum relative to a Nyquist frequency of the signal processing device.
A measurement method for digitally measuring a signal, the method comprising:
- receiving a measurement signal by an input device;
- determining a frequency spectrum of the received measurement signal by a spectrum analyzing device;
- processing the received measurement signal with a preset sampling rate by a signal processing device;
- setting the sampling rate of the signal processing device by a control processor;
- and
- determining, by the control processor, whether a position of at least one frequency component of the frequency spectrum relative to a Nyquist frequency of the signal processing device.
Dependencies are inferred from the claim text.