公开(公告)号：EP0945731A4

公开(公告)日：2000-01-05

申请号：EP97946823

申请日：1997-12-09

申请人： SONY TEKTRONIX CORP

发明人： NARA AKIRA-SONY TEKTRONIX CORP

IPC分类号： G01R13/20 ,  G01R23/16

CPC分类号： G01R23/16

摘要： A novel real-time signal analyzer which has the merits of both the conventional real-time FFT analyzer and a vector signal analyzer and eliminates the demerits of the analyzers. This analyzer is provided with an FFT processor (14) which performs FFT operation on time-domain data in real time, a FIFO memory (22) which delays the time-domain data before the FFT operation, and a double-port memory (24) which stores FFT-operated frequency-domain data from the processor (14) and, at the same time, delayed time-domain data read out from the memory (22). Since the delayed time by means of the memory (22) is set correspondingly to the operating time of the processor (14), the temporal correspondence relation between the delayed time-domain data and the frequency-domain data can be secured. Therefore, the time-domain data and the frequency-domain data having temporal simultaneousness and real-time properties can be obtained separately and simultaneously.

公开(公告)号：EP0973041A4

公开(公告)日：2000-01-19

申请号：EP98901096

申请日：1998-02-02

申请人： SONY TEKTRONIX CORP

发明人： NARA AKIRA

IPC分类号： G01R13/20 ,  G01R23/16

CPC分类号： G01R23/16

摘要： A real time signal analyzer capable of generating time region data and frequency region data at substantially the same time, and resetting a central frequency and a signal analysis range, the analyzer being provided with frequency conversion means (14, 16) for frequency-shifting input time region data and carrying out a thinning-out operation, an FFT processor (18) adapted to FFT-compute output data from the frequency conversion means in real time, a delay means (28) for delaying the output data from the frequency conversion means, a means (32) for storing the frequency region data from the FFT processor, a means (36) for storing the time region delay data read out from the delay means, and means (30, 38) for feeding back the data read out from the time region data storage means, instead of the input time region data, to the frequency conversion means.

摘要翻译： 一种实时信号分析仪，能够基本上同时生成时域数据和频域数据，并且重置中心频率和信号分析范围，该分析仪配备有频率转换装置（14,16），用于频移输入 时间区域数据并进行稀疏化处理; FFT处理器（18），用于实时FFT运算来自频率变换装置的输出数据;延迟装置（28），用于延迟来自频率变换装置的输出数据 ，用于存储来自FFT处理器的频域数据的装置（32），用于存储从延迟装置读出的时域延迟数据的装置（36），以及用于反馈读出的数据的装置（30,38） 从时域数据存储装置，而不是输入时域数据，到频率转换装置。