-
1.发明申请公开(公告)号：US20140123203A1
公开(公告)日：2014-05-01
申请号：US14067596
申请日：2013-10-30
IPC分类号： H04N7/10
摘要： Unlike conventional methods and systems for locating ingress, which only monitor the upstream path, a method and system of locating ingress by monitoring the downstream path is provided. A test system measures the signal quality in the upstream path and in dependence upon a noise level being above a predetermined limit, polls a plurality of terminal equipment devices to return a downstream signal quality measurement. The test instrument analyzes the downstream signal quality measurements to locate an ingress source contributing to the noise.
摘要翻译： 不同于常规的用于定位入口的方法和系统，其仅监视上游路径，提供了通过监视下游路径定位入口的方法和系统。 测试系统测量上游路径中的信号质量，并且根据高于预定极限的噪声电平，轮询多个终端设备设备以返回下游信号质量测量。 测试仪器分析下游信号质量测量，以定位有助于噪声的入口源。
-
公开(公告)号：US07792183B2
公开(公告)日：2010-09-07
申请号：US11856921
申请日：2007-09-18
IPC分类号： H04B3/46
CPC分类号： H04B17/309 , H04B17/21
摘要： The present invention relates to a system for calculating a digital quality index (DQI), which provides a rating on a predetermined scale, indicative of the impairments in a received quadrature amplitude modulated (QAM) signal in a CATV cable system. The DQI system utilizes bit error rates prior to and after forward error correction to calculate the DQI value. To increase the calculation rate, the bit error rates can be estimated using voltage errors, signal to noise ratios and/or average corner error metrics.
摘要翻译： 本发明涉及一种用于计算数字质量指数（DQI）的系统，该数字质量指数（DQI）提供指示CATV电缆系统中接收的正交幅度调制（QAM）信号中的损伤的预定比例的额定值。 DQI系统在前向纠错前后利用误码率来计算DQI值。 为了增加计算速率，可以使用电压误差，信噪比和/或平均角误差度量来估计误码率。
-
公开(公告)号：US20080089402A1
公开(公告)日：2008-04-17
申请号：US11856921
申请日：2007-09-18
CPC分类号： H04B17/309 , H04B17/21
摘要： The present invention relates to a system for calculating a digital quality index (DQI), which provides a rating on a predetermined scale, indicative of the impairments in a received quadrature amplitude modulated (QAM) signal in a CATV cable system. The DQI system utilizes bit error rates prior to and after forward error correction to calculate the DQI value. To increase the calculation rate, the bit error rates can be estimated using voltage errors, signal to noise ratios and/or average corner error metrics.
摘要翻译： 本发明涉及一种用于计算数字质量指数（DQI）的系统，该数字质量指数（DQI）提供指示CATV电缆系统中接收的正交幅度调制（QAM）信号中的损伤的预定比例的额定值。 DQI系统在前向纠错前后利用误码率来计算DQI值。 为了增加计算速率，可以使用电压误差，信噪比和/或平均角误差度量来估计误码率。
-
4.发明授权Test device and method of detecting an imbalance in a power level of a channel 有权检测通道功率电平不平衡的测试装置和方法公开(公告)号：US08718121B2
公开(公告)日：2014-05-06
申请号：US12571777
申请日：2009-10-01
CPC分类号： H04B17/318 , H04B17/10 , H04B17/21 , H04B17/309
摘要： The present invention provides a test device and a method enabling automatic detection of an imbalance in a power level of a channel. The test device includes a tuner, a power-level measurement system, and an evaluation unit. According to the method, a test channel is selected from a plurality of channels, by means of the tuner. A power level of the test channel and a total power level of the plurality of channels are measured, by means of the power-level measurement system. A ratio of the total power level of the plurality of channels to the power level of the test channel is then evaluated, by means of the evaluation unit, to detect an imbalance in a power level of the test channel.
摘要翻译： 本发明提供一种能够自动检测信道功率电平不平衡的测试装置和方法。 测试装置包括调谐器，功率电平测量系统和评估单元。 根据该方法，通过调谐器从多个通道中选择测试通道。 通过功率电平测量系统测量测试信道的功率电平和多个信道的总功率电平。 然后通过评估单元评估多个通道的总功率电平与测试通道的功率电平的比率，以检测测试通道的功率电平的不平衡。
-
公开(公告)号：US08311086B2
公开(公告)日：2012-11-13
申请号：US12241365
申请日：2008-09-30
申请人： Walter Miller , Pingnan Shi , Reena Ramname , Gregory W. Massey
发明人： Walter Miller , Pingnan Shi , Reena Ramname , Gregory W. Massey
IPC分类号： H04B3/46
CPC分类号： H04N7/10 , H04N17/004
摘要： A method and apparatus are provided for testing susceptibility of a receiver to intermodulation distortion of a digital channel, the method including selecting a first digital channel from channels in a composite signal, determining a first power measurement from the first digital channel, determining a total power measurement from other channels in the composite signal, and determining susceptibility of the first digital channel to intermodulation distortion by comparing the first power measurement and the total power measurement with intermodulation distortion characteristics of the receiver.
摘要翻译： 提供了一种用于测试接收机对数字信道的互调失真的敏感度的方法和装置，所述方法包括从复合信号中的信道中选择第一数字信道，从第一数字信道确定第一功率测量，确定总功率 通过将所述第一功率测量与所述总功率测量与所述接收机的互调失真特性进行比较来确定所述第一数字信道对互调失真的敏感性。
-
公开(公告)号：US08189651B2
公开(公告)日：2012-05-29
申请号：US12413086
申请日：2009-03-27
CPC分类号： H04B17/309 , H04B17/21
摘要： The invention relates to a method for measuring Hum on a digital QAM carrier using a testing device for testing digital TV signals including a QAM demodulator therein, and to a testing device implementing the method. A micro-controller is used to sample a register associated with an AGC circuit in the QAM demodulator, and to process the collected register values to obtain one or more Hum characteristics.
摘要翻译： 本发明涉及一种使用测试装置测量数字QAM载波的方法，该测试装置用于测试其中包括QAM解调器的数字电视信号，以及实施该方法的测试装置。 微控制器用于对与QAM解调器中的AGC电路相关联的寄存器进行采样，并处理收集的寄存器值以获得一个或多个Hum特性。
-
7.发明申请TEST DEVICE AND METHOD OF DETECTING AN IMBALANCE IN A POWER LEVEL OF A CHANNEL 有权检测信道功率级别不平衡的测试装置和方法公开(公告)号：US20100014572A1
公开(公告)日：2010-01-21
申请号：US12571777
申请日：2009-10-01
IPC分类号： H04B17/00
CPC分类号： H04B17/318 , H04B17/10 , H04B17/21 , H04B17/309
摘要： The present invention provides a test device and a method enabling automatic detection of an imbalance in a power level of a channel. The test device includes a tuner, a power-level measurement system, and an evaluation unit. According to the method, a test channel is selected from a plurality of channels, by means of the tuner. A power level of the test channel and a total power level of the plurality of channels are measured, by means of the power-level measurement system. A ratio of the total power level of the plurality of channels to the power level of the test channel is then evaluated, by means of the evaluation unit, to detect an imbalance in a power level of the test channel.
摘要翻译： 本发明提供一种能够自动检测信道功率电平不平衡的测试装置和方法。 测试装置包括调谐器，功率电平测量系统和评估单元。 根据该方法，通过调谐器从多个通道中选择测试通道。 通过功率电平测量系统测量测试信道的功率电平和多个信道的总功率电平。 然后通过评估单元评估多个通道的总功率电平与测试通道的功率电平的比率，以检测测试通道的功率电平的不平衡。
-
公开(公告)号：US20090185037A1
公开(公告)日：2009-07-23
申请号：US12413086
申请日：2009-03-27
IPC分类号： H04N17/00
CPC分类号： H04B17/309 , H04B17/21
摘要： The invention relates to a method for measuring Hum on a digital QAM carrier using a testing device for testing digital TV signals including a QAM demodulator therein, and to a testing device implementing the method. A micro-controller is used to sample a register associated with an AGC circuit in the QAM demodulator, and to process the collected register values to obtain one or more Hum characteristics.
摘要翻译： 本发明涉及一种使用测试装置测量数字QAM载波的方法，该测试装置用于测试其中包括QAM解调器的数字电视信号，以及实施该方法的测试装置。 微控制器用于对与QAM解调器中的AGC电路相关联的寄存器进行采样，并处理收集的寄存器值以获得一个或多个Hum特性。
-
公开(公告)号：US08605775B2
公开(公告)日：2013-12-10
申请号：US13465951
申请日：2012-05-07
申请人： Gregory W. Massey
发明人： Gregory W. Massey
CPC分类号： H04B17/309 , H04B17/21
摘要： The invention relates to a method for measuring Hum on a digital QAM carrier using a testing device for testing digital TV signals including a QAM demodulator therein, and to a testing device implementing the method. A controller is used to sample a register associated with a final AGC stage in a QAM demodulator, and to process the collected register values to obtain one or more Hum characteristics. In one embodiment, a circular buffer is used to collect aligned sequences of AGC samples that have a pre-determined feature of time-domain Hum at a specified position therein. The aligned AGC sequences are then correlated to assess causes of Hum.
摘要翻译： 本发明涉及一种使用测试装置测量数字QAM载波的方法，该测试装置用于测试其中包括QAM解调器的数字电视信号，以及实施该方法的测试装置。 控制器用于对与QAM解调器中的最终AGC级相关联的寄存器进行采样，并处理收集的寄存器值以获得一个或多个Hum特性。 在一个实施例中，循环缓冲器用于收集具有在其中的指定位置处具有时域Hum的预定特征的AGC样本的对准序列。 然后将对准的AGC序列相关联以评估Hum的原因。
-
10.发明申请公开(公告)号：US20090245117A1
公开(公告)日：2009-10-01
申请号：US12414930
申请日：2009-03-31
IPC分类号： H04L12/26
CPC分类号： H04N17/004
摘要： A method and apparatus are provided for detecting network impairments through tilt-normalized measurement data, the method including: collecting data for a network signal; computing a best-fit tilt for the collected data; performing tilt-normalization of the collected data responsive to the computed best-fit tilt; and determining whether the tilt-normalized data crosses a threshold, and if so, pattern matching the tilt-normalized data to detect a network impairment; and the apparatus including: an input unit for collecting data from a network signal; a tilt unit connected to the input unit for computing a best-fit tilt for the collected data and performing tilt-normalization of the collected data responsive to the computed best-fit tilt; and a pattern matching unit connected to the tilt unit for determining whether the tilt-normalized data crosses a threshold, and if so, pattern matching the tilt-normalized data to detect at least one network impairment.
摘要翻译： 提供一种通过倾斜归一化测量数据检测网络损伤的方法和装置，该方法包括：收集网络信号的数据; 为收集的数据计算最佳拟合倾斜度; 响应于所计算的最佳拟合倾斜，执行收集的数据的倾斜归一化; 以及确定所述倾斜归一化数据是否跨越阈值，如果是，则匹配所述倾斜归一化数据以检测网络损伤; 所述装置包括：用于从网络信号收集数据的输入单元; 连接到所述输入单元的倾斜单元，用于针对所收集的数据计算最佳拟合倾斜，并且响应于所计算的最佳拟合倾斜执行所收集的数据的倾斜归一化; 以及连接到所述倾斜单元的模式匹配单元，用于确定所述倾斜归一化数据是否跨越阈值，如果是，则匹配所述倾斜归一化数据以检测至少一个网络损伤。
-
-
-
-
-
-
-
-
-
搜索结果
16 条记录 (耗时 0.023 秒)
