摘要 |
A method is provided for measuring insertion loss in cables. The method comprises the steps of measuring a first insertion loss IL<SUB>12 </SUB>of a first circuit path including the series connection of a first cable and a second cable, measuring a second insertion loss IL<SUB>23 </SUB>of a second circuit path including the series connection of the second cable and a third cable, measuring a third insertion loss IL<SUB>13 </SUB>of a third circuit path including the series connection of the first cable and the third cable, and calculating an insertion loss of three or more cables using the formulas: <maths id="MATH-US-00001" num="1"> <MATH OVERFLOW="SCROLL"> <MROW> <MSUB> <MI>IL</MI> <MN>1</MN> </MSUB> <MO>=</MO> <MFRAC> <MROW> <MSUB> <MI>IL</MI> <MN>12</MN> </MSUB> <MO>-</MO> <MSUB> <MI>IL</MI> <MN>23</MN> </MSUB> <MO>+</MO> <MSUB> <MI>IL</MI> <MN>13</MN> </MSUB> </MROW> <MN>2</MN> </MFRAC> </MROW> </MATH> </MATHS> <maths id="MATH-US-00001-2" num="1.2"> <MATH OVERFLOW="SCROLL"> <MROW> <MSUB> <MI>IL</MI> <MN>3</MN> </MSUB> <MO>=</MO> <MROW> <MSUB> <MI>IL</MI> <MN>13</MN> </MSUB> <MO>-</MO> <MSUB> <MI>IL</MI> <MN>1</MN> </MSUB> </MROW> </MROW> </MATH> </MATHS> <maths id="MATH-US-00001-3" num="1.3"> <MATH OVERFLOW="SCROLL"> <MROW> <MSUB> <MI>IL</MI> <MN>2</MN> </MSUB> <MO>=</MO> <MROW> <MSUB> <MI>IL</MI> <MN>23</MN> </MSUB> <MO>-</MO> <MSUB> <MI>IL</MI> <MN>3</MN> </MSUB> </MROW> </MROW> </MATH> </MATHS> <maths id="MATH-US-00001-4" num="1.4"> <MATH OVERFLOW="SCROLL"> <MROW> <MSUB> <MI>IL</MI> <MI>n</MI> </MSUB> <MO>=</MO> <MROW> <MSUB> <MI>IL</MI> <MROW> <MN>3</MN> <MO></MO> <MI>n</MI> </MROW> </MSUB> <MO>-</MO> <MSUB> <MI>IL</MI> <MN>3</MN> </MSUB> </MROW> </MROW> </MATH> </MATHS> Where n is the number of cables to be tested.
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