| 摘要 |
PROBLEM TO BE SOLVED: To provide a means for extending the dynamic range of a measurement system and improving measurement accuracy. SOLUTION: Dynamic range extension apparatuses 100 and 100' are provided with a signal splitter 102, cancellation paths 110 and 110', testing paths 120 and 120' and a signal combiner 104. The signal splitter 102 splits a signal from an input signal source 140 into two signals (202). A first split signal passes through the cancellation paths 110 and 110' and is phase shifted (204), and a cancellation signal is generated. A second split signal passes through the test paths 120 and 120' and is added to a device for receiving test (206), and an attenuated response signal is generated (208). At the outputs of the cancellation paths 110 and 110' and the test paths 120 and 120', respectively, the cancellation signal and the attenuated response signal are combined by a signal combiner 104 prior to being delivered to a measurement processor 150 (210). |
