| 摘要 |
A line analyzer for detecting line anomalies that may be indicative of electronic tape or other surveillance related electronics coupled to a wire pair in a multiple conductor cable utilizes a switching matrix to identify possible pairings of the conductors and instruct the analyzer to selectively couple to each of the identified conductor pairings. Tests such as non-linear junction detection and frequency or time domain reflectometry operations are automatically performed on each of the wire pairs by the analyzer. The analyzer can automatically identify balanced pairs and limit the testing to the identified balanced pairs to minimize the time required for testing if desired. The results are then mathematically and graphically compared to identify wires having line anomalies. The tests can be performed over time intervals to locate transient anomalies.
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