Signal correction method, system for correcting a measured signal, as well as oscilloscope
AssigneeRohde & Schwarz GmbH & Co. KG
InventorsMartin Peschke, Andreas Ziegler
Life of this patent
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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.
Claims13
A signal correction method for correcting a measured signal having 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;
- determining the transfer function for correcting the measured signal;
- applying a signal to be measured to the second measurement input yielding a digital representation of a third signal at the second measurement input;
- applying a signal causing interference to the first measurement input yielding a digital representation of the signal causing interference;
- and
- correcting the digital representation of the third signal by using a convolution of the digital representation of the signal causing interference and the transfer function to obtain the corrected measured signal.
A system for correcting a measured signal, comprising a first measurement input, a second measurement input, a control unit, and an analog to digital converter allocated to each of the measurement inputs, wherein the control unit is configured to:
- process a digital representation of a first signal at a first measurement input;
- process a digital representation of a second signal at a second measurement input corresponding to the first signal convoluted with a transfer function;
- determine the transfer function for correcting the measured signal;
- apply a signal to be measured to the second measurement input yielding a digital representation of a third signal at the second measurement input;
- apply a signal causing interference to the first measurement input yielding a digital representation of the signal causing interference;
- and
- correct the digital representation of the third signal by using a convolution of the digital representation of the signal causing interference and the transfer function to obtain the corrected measured signal.
An oscilloscope having a system for correcting a measured signal, comprising a first measurement input, a second measurement input, a control unit, an analog to digital converter allocated to each of the measurement inputs, wherein the control unit is configured to:
- process a digital representation of a first signal at a first measurement input;
- process a digital representation of a second signal at a second measurement input corresponding to the first signal convoluted with a transfer function;
- determine the transfer function for correcting the measured signal;
- apply a signal to be measured to the second measurement input yielding a digital representation of a third signal at the second measurement input;
- apply a signal causing interference to the first measurement input yielding a digital representation of the signal causing interference;
- and
- correct the digital representation of the third signal by using a convolution of the digital representation of the signal causing interference and the transfer function to obtain the corrected measured signal.
Dependencies are inferred from the claim text.