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US 7,443,912 B2Granted
Method and system for displaying the amplitude distortions of a transmission channel
AssigneeRohde & Schwarz GmbH & Co. KG
InventorsChristoph Balz, Wolfgang Feicht
Life of this patent
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Abstract
In order to display the amplitude distortions of a transmission channel, the amplitude distribution of a measurement signal of a known amplitude distribution is measured at the output of the transmission channel. Based on a given multitude of amplitude measured values that are measured and digitized in succession, the frequency of occurrence of the amplitude distribution is then determined and displayed in adjacently connected amplitude windows.
Claims7
A method for displaying amplitude distortions of a transmission channel, said method comprising:
- transmitting a measurement signal of a known amplitude distribution via the transmission channel;
- measuring amplitude values at an output of the transmission channel;
- converting the amplitude values into digital values;
- dividing an amplitude values measuring range into adjacently connected amplitude windows;
- determining from a given multitude of the digital values a frequency of occurrence of the amplitude values in the adjacently connected amplitude windows, to thereby determine amplitude frequency values;
- and
- displaying via a display device the amplitude frequency values thus ascertained for each of the amplitude windows, wherein a reference value is a root-mean-square value ascertained from the amplitude frequency values determined in all, and only the amplitude frequency values of the amplitude windows occurring above the reference value are displayed, and a quadratically weighted average is calculated from a sum of the amplitude frequency values as the reference value.
4 more elements
Dependencies are inferred from the claim text.