公开(公告)号：US20130173195A1

公开(公告)日：2013-07-04

申请号：US13822436

申请日：2011-01-06

申请人： Jinsoup Joung ,  Jongmin Kim ,  Changbok Yang ,  Myunggu Kang

发明人： Jinsoup Joung ,  Jongmin Kim ,  Changbok Yang ,  Myunggu Kang

IPC分类号： G01D18/00

CPC分类号： G01D18/002 ,  H04B17/13

摘要： This invention relates to a calibration method of modulation power for DVB-H test apparatus for reducing the calibration time for the power loss in the RF cable to half through calibration using the expected power loss of the modulated wave at an arbitrary frequency based on the measured power losses of the continuous wave over frequencies in the RF cable. The calibration method of modulation power for DVB-H test apparatus that is performed by the computer with installed calibration program therein and connected to the power meter of the DVB-H test apparatus, comprises and includes the steps of: commanding DVB-H test apparatus to output continuous waves having frequencies from the start frequency to the stop frequency with increment of frequency step in accordance with the preset power level; storing CW power offset, that is the difference between the actual power level and the preset power level, to the table after receiving actual power level of continuous waves having frequencies from the start frequency to the stop frequency with increment of frequency step from the power meter; commanding DVB-H test apparatus to output a modulated wave that carries data on a continuous wave having an arbitrary frequency between the start frequency and the stop frequency, thereafter receiving actual output power level from the power meter, and calculating the modulation power offset between the continuous wave and the modulated wave at the corresponding arbitrary frequency, thereafter commanding DVB-H test apparatus to output the preset power level added with the power offset of the continuous wave and the power offset of the modulated wave when transmitting the modulated wave.

摘要翻译： 本发明涉及一种用于DVB-H测试装置的调制功率的校准方法，用于将射频电缆中的功率损耗的校准时间减少到通过校准的一半，所述校准时间使用基于所测量的任意频率的调制波的预期功率损耗 射频电缆中频率连续波的功率损耗。 由其中安装有校准程序的计算机执行并连接到DVB-H测试装置的功率计的DVB-H测试装置的调制功率的校准方法包括以下步骤：指令DVB-H测试装置 根据预设的功率电平以频率步长的增量输出具有从起始频率到停止频率的频率的连续波; 将来自功率计的频率增量的从起始频率到停止频率的连续波的实际功率电平存储在表的实际功率电平和预设功率电平之间的CW功率偏移量， ; 命令DVB-H测试装置输出在起始频率和停止频率之间具有任意频率的连续波上的数据的调制波，然后从功率计接收实际输出功率电平，并计算在 连续波和相应任意频率的调制波，此后命令DVB-H测试装置在传输调制波时输出附加了连续波的功率偏移的预设功率电平和调制波的功率偏移。

公开(公告)号：US09625289B2

公开(公告)日：2017-04-18

申请号：US13822436

申请日：2011-01-06

申请人： Jinsoup Joung ,  Jongmin Kim ,  Changbok Yang ,  Myunggu Kang

发明人： Jinsoup Joung ,  Jongmin Kim ,  Changbok Yang ,  Myunggu Kang

IPC分类号： G01D18/00 ,  H04B17/13

CPC分类号： G01D18/002 ,  H04B17/13

摘要： This invention relates to a calibration method of modulation power for DVB-H test apparatus for reducing the calibration time for the power loss in the RF cable to half through calibration using the expected power loss of the modulated wave at an arbitrary frequency based on the measured power losses of the continuous wave over frequencies in the RF cable. The calibration method of modulation power for DVB-H test apparatus that is performed by the computer with installed calibration program therein and connected to the power meter of the DVB-H test apparatus, comprises and includes the steps of: commanding DVB-H test apparatus to output continuous waves having frequencies from the start frequency to the stop frequency with increment of frequency step in accordance with the preset power level; storing CW power offset, that is the difference between the actual power level and the preset power level, to the table after receiving actual power level of continuous waves having frequencies from the start frequency to the stop frequency with increment of frequency step from the power meter; commanding DVB-H test apparatus to output a modulated wave that carries data on a continuous wave having an arbitrary frequency between the start frequency and the stop frequency, thereafter receiving actual output power level from the power meter, and calculating the modulation power offset between the continuous wave and the modulated wave at the corresponding arbitrary frequency, thereafter commanding DVB-H test apparatus to output the preset power level added with the power offset of the continuous wave and the power offset of the modulated wave when transmitting the modulated wave.