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APC-7 connector
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== Features == APC-7 connector pairs have several desirable features: * The connectors are genderless. This avoids some awkward adapters or duplication of laboratory standards. With a gendered connector, a laboratory might need a precision male load and a precision female load. With a genderless connector, only one load is required. Although the illustration shows threads on one connector of the pair, all connectors contain a retractable male thread which can be revealed or retracted by turning the outer locking nut. Any two can be mated by retracting the thread in either one and leaving it protruding in the other.<ref>{{Cite web |title=How to Mate APC-7 mm Connectors - Technical Support Knowledge Center Open |url=https://docs.keysight.com/kkbopen/how-to-mate-apc-7-mm-connectors-925976044.html |archive-url=https://web.archive.org/web/20250520152100/https://docs.keysight.com/kkbopen/how-to-mate-apc-7-mm-connectors-925976044.html |archive-date=2025-05-20 |access-date=2025-05-20 |website=docs.keysight.com}}</ref> * The connectors have a well-defined reference plane. Consequently, the connectors simplify some measurements. * The mated pair of APC-7 connectors has a low reflection coefficient and thus low [[voltage standing wave ratio]] (VSWR). The low reflection coefficient means better measurement accuracy. The typical VSWR is 1.025:1 at 18 GHz.<ref name="HP1979p90"/> * The mated pair makes a repeatable connection. A pair has a repeatable reflection coefficient to Β±0.001.<ref name="HP1979p90"/> Consequently, laboratory measurements have reduced uncertainty.
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