Electricity: measuring and testing – Plural – automatically sequential tests
Patent
1984-03-30
1987-06-02
Karlsen, Ernest F.
Electricity: measuring and testing
Plural, automatically sequential tests
324 51, 324115, 324133, G01R 3102
Patent
active
046707093
ABSTRACT:
A portable battery powered tone source with a built-in audio cable tester. Plural outputs consist of -40 dB, mic level; -10 dB line level and 1W speaker level. Continuity in the system under test from input to speakers causes an audio frequency signal to be present at speakers. This systems own speakers can be used as monitors in the testing process. Moving the device (source) enables the user to audibly locate the point at which the continuity starts/stops. At such time the user can test the audio castle at that point. The various plugs of the device are compatible with all common audio jacks enabling the user to test all types of audio equipment as well as all types of audio cables with only one device. The device can also be used to test any direct point-to-point connection such as common ground or a PC board run with a simple test lead adaptor.
REFERENCES:
patent: 2732491 (1956-01-01), Jeannot
patent: 3462689 (1969-08-01), Fenton
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