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    • 3. 发明申请
    • Apparatus and Method for Measuring Loop Insertion Loss Single-Endedly
    • 单端测量回路插入损耗的装置和方法
    • US20070263777A1
    • 2007-11-15
    • US11752963
    • 2007-05-24
    • Timothy VitanzaRebecca RossRegis Nero
    • Timothy VitanzaRebecca RossRegis Nero
    • H04M1/24H04M3/08H04M3/22
    • H04M3/30H04M3/305H04M3/306
    • The system and method of determining insertion loss of a telephone line under test (LUT) determines a first insertion loss as a function of plurality of different equivalent circuit values of the LUT determined at a plurality of different frequencies of a first set of discrete frequencies. A running standard deviation (rSTD) of a predicted length d of the LUT at each frequency of a second set of discrete frequencies is determined from the predicted lengths d of the LUT at and below said frequency. A second insertion loss is determined based on the pair of adjacent discrete frequencies of the second set of discrete frequencies that have the largest difference between their rSTDs. Based on a comparison of the first and second insertion losses to an expected insertion loss, one of these insertion losses is deemed to be the actual insertion loss of the LUT.
    • 确定被测试电话线路(LUT)的插入损耗的系统和方法确定作为在第一组离散频率的多个不同频率处确定的LUT的多个不同等效电路值的函数的第一插入损耗。 在第二组离散频率的每个频率处的LUT的预测长度d的运行标准偏差(rSTD)根据在所述频率和低于所述频率的LUT的预测长度d来确定。 基于在其rSTD之间具有最大差异的第二组离散频率的相邻离散频率对来确定第二插入损耗。 基于第一和第二插入损耗与预期插入损耗的比较,这些插入损耗之一被认为是LUT的实际插入损耗。
    • 5. 发明申请
    • Apparatus and method for measuring loop insertion loss single-endedly
    • 单端测量回路插入损耗的装置和方法
    • US20060159231A1
    • 2006-07-20
    • US11334239
    • 2006-01-18
    • Timothy VitanzaRebecca RossRegis Nero
    • Timothy VitanzaRebecca RossRegis Nero
    • H04M1/24H04M3/08
    • H04M3/30H04M3/305H04M3/306
    • The system and method of determining insertion loss of a telephone line under test (LUT) determines a first insertion loss as a function of plurality of different equivalent circuit values of the LUT determined at a plurality of different frequencies of a first set of discrete frequencies. A running standard deviation (rSTD) of a predicted length d of the LUT at each frequency of a second set of discrete frequencies is determined from the predicted lengths d of the LUT at and below said frequency. A second insertion loss is determined based on the pair of adjacent discrete frequencies of the second set of discrete frequencies that have the largest difference between their rSTDs. Based on a comparison of the first and second insertion losses to an expected insertion loss, one of these insertion losses is deemed to be the actual insertion loss of the LUT.
    • 确定被测试电话线路(LUT)的插入损耗的系统和方法确定作为在第一组离散频率的多个不同频率处确定的LUT的多个不同等效电路值的函数的第一插入损耗。 在第二组离散频率的每个频率处的LUT的预测长度d的运行标准偏差(rSTD)根据在所述频率和低于所述频率的LUT的预测长度d来确定。 基于在其rSTD之间具有最大差异的第二组离散频率的相邻离散频率对来确定第二插入损耗。 基于第一和第二插入损耗与预期插入损耗的比较,这些插入损耗之一被认为是LUT的实际插入损耗。