Patent ID: 9678153
Date: 2017-06-13
CPC Classifications: G01R

Claim:
1. A method for determining time differences between test signals measured by at least two coupled measuring devices, wherein the at least two coupled measuring devices comprise and correspond to a first measuring device and at least one second measuring device, comprising: generating a time basis signal for the at least two coupled measuring devices, in that one of the at least two coupled measuring devices generates and supplies a common time basis signal for the at least two coupled measuring devices; generating a common reference signal by a signal generator and providing the common reference signal to a reference-signal input of a switching device comprising a first switching element and at least one second switching element, wherein a first measuring-device port of the switching device is connected to the first measuring device and is connected by the first switching element alternately to either a first measurement port of the switching device or to the reference-signal input of the switching device, and respectively at least one second measuring-device port of the switching device is connected to the at least one second measuring device and is alternately connected by the at least one second switching element to either a second measurement port of the switching device or to the reference-signal input of the switching device; switching the first switching element and the at least one second switching element to supply simultaneously the common reference signal to the first measuring-device port and the at least one second measuring-device port or to supply the test signals received at the first measurement port and at the at least one second measurement port to the respectively allocated first measuring-device port and at least one second measuring-device port; wherein the switching device periodically switches between either supplying the common reference signal or the test signals via the first measuring-device port to a first test signal input of the first measuring device and via the at least one second measuring-device port to at least one second test signal input of the at least one second measuring device during a measurement determining the relative time position of each test signal of the test signals relative to the common reference signal by the respective first measuring device and the at least one second measuring device; determining, by the first measuring device or the at least one second measuring device, the time differences between the test signals received at the first measurement port and the at least one second measurement port from the determined relative time positions of each test signal of the test signals.