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公开(公告)号：EP1672376A1
公开(公告)日：2006-06-21
申请号：EP05257471.2
申请日：2005-12-05
申请人： TEKTRONIX, INC.
发明人： Bernard, Kyle L. , Sega, Koichi
IPC分类号： G01R23/16 , G01R23/173
CPC分类号： G01R13/0254 , G01R23/16
摘要： An RF/IF signature trigger for acquiring received RF signal data is generated by correlating the received RF signal data in the form of a time domain RF/IF signal, a detected RF/IF signal and/or a frequency domain RF/IF signal with a reference signal defined by a signal signature record representing desired/undesired RF/IF signal patterns, detected RF pulse shapes, special RF markers used specifically for triggering signal acquisitions, particular signal patterns of interest and the like. The resulting correlation factor continuously calculated in real time is compared with a variable correlation threshold such that when the correlation factor reaches the variable correlation threshold, either positive or negative, the RF/IF signature trigger is generated to acquire the received RF signal data for analysis.
摘要翻译： 通过将接收的RF信号数据以时域RF / IF信号，检测到的RF / IF信号和/或频域RF / IF信号的形式与所接收的RF信号数据相关联来产生用于获取接收的RF信号数据的RF / IF签名触发， 由表示期望/不期望的RF / IF信号图案的信号签名记录，检测到的RF脉冲形状，专门用于触发信号采集的特殊RF标记，特定的感兴趣信号模式等的信号签名记录定义的参考信号。 将所得到的实时连续计算的相关因子与可变相关阈值进行比较，使得当相关系数达到可变相关阈值（正或负）时，产生RF / IF签名触发以获取所接收的RF信号数据用于分析 。
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公开(公告)号：EP1669764A1
公开(公告)日：2006-06-14
申请号：EP05257440.7
申请日：2005-12-02
申请人： TEKTRONIX, INC.
CPC分类号： G01R23/16 , G01R13/0263
摘要： A modulation domain trigger generator demodulates a modulated input signal to extract information content, and a trigger is generated from the extracted information content in response to specified trigger criteria. The modulation domain trigger generator may be combined with a plurality of different types of trigger generators (12,14,16,18), including frequency domain (12) and time domain trigger generators (14), to process the input signal in response to different trigger criteria to produce more than one trigger. The different trigger outputs may be combined (44) to produce an acquisition trigger to acquire data surrounding an anomalous or identifiable event within the input signal.
摘要翻译： 调制域触发发生器解调调制输入信号以提取信息内容，并且响应于指定的触发标准从所提取的信息内容产生触发。 调制域触发发生器可以与包括频域（12）和时域触发发生器（14）的多种不同类型的触发发生器（12,14,16,18）组合，以响应于 不同的触发条件产生多个触发。 可以组合（44）不同的触发输出以产生采集触发以获取围绕输入信号内的异常或可识别事件的数据。
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公开(公告)号：EP0908735B1
公开(公告)日：2005-02-16
申请号：EP98118893.1
申请日：1998-10-06
CPC分类号： G01R23/02 , G01R23/167
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公开(公告)号：EP1049937B1
公开(公告)日：2002-03-06
申请号：EP99907253.1
申请日：1999-01-20
发明人： SCHEPPACH, Frank
IPC分类号： G01R23/16
CPC分类号： G06F17/141 , G01R23/16
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公开(公告)号：EP0804740B1
公开(公告)日：2001-08-08
申请号：EP95944606.3
申请日：1995-12-12
申请人： Anritsu Company
摘要： A handheld vector network analyzer (VNA) (300) providing a wide bandwidth test signal Fo utilizing a narrowband test signal synthesizer (700) which provides the test signal through a frequency divider (710) or harmonic generator (802). With a 550-1100 MHz narrowband test signal synthesizer, a test signal Fo can range from 25 MHz to 3.3 GHz. To make a tracking synthesizer (720) operate more independent of the test signal synthesizer (700), a LO signal is produced using the tracking synthesizer (720) with its phase detector (726) input connected through a frequency divider (800) to the output of the test signal synthesizer. Synchronous detectors are further included which provide incident and reflected IF signals to take advantage of the maximum range of an A/D converter. To better enable operation in the presence of external signals, feedback is provided from the synchronous detectors to sweep the frequency of a reference oscillator (940).
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56.发明公开
公开(公告)号：EP0990161A2
公开(公告)日：2000-04-05
申请号：EP98922491.0
申请日：1998-05-26
申请人： Anritsu Company
发明人： BRADLEY, Donald, A.
IPC分类号： G01R23/16
摘要： A two port handheld VNA enabling both reflection and transmission measurements to be made over a range of 25 MHz to 3.3 GHz frequency range. The handheld VNA includes a tracking synthesizer (420) which generates an LO signal without a direct connection to a reference oscillator (440), enabling resolution of the LO signal to be independent of a generated RF test signal. Synchronous detectors (501-505, 574, 575) are further included to provide incident, reflected, and transmitted IF signals to an A/D converter (548). To enable operation in the presence of external signals, a feedback dither line is provided from one of the synchronous detector (533) outputs to sweep the frequency of the reference oscillator (440). The handheld VNA also is configured to optionally operate as a frequency monitor to determine the frequency range and power level of incoming signals without upconverting and downconverting to eliminate images as typically done in a spectrum analyzer. The frequency monitoring circuit operates by dividing the frequency range to be monitored into bins. The LO signal is then stepped for each bin until RF signals within the bin frequency range can generate an IF signal. The maximum IF signal power level detected during measurements for the bin is then stored as a power level for signals in each bin.
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公开(公告)号：EP0981054A2
公开(公告)日：2000-02-23
申请号：EP99115116.8
申请日：1999-08-10
发明人： Nara, Akira
IPC分类号： G01R23/16 , G01R23/163
CPC分类号： G01R23/16
摘要： A wide band signal analyzer according to the present invention is suitable for analyzing a wide frequency band signal with keeping the signal quality even though it can be realized at low cost. It has narrow and wide frequency band passes, which can be constructed by the optimum devices according to the frequency band, respectively. The data storage operation of the wide band frequency pass is controlled by a trigger signal, which is detected by using the data derived from the narrow frequency band pass. A frequency converter (10) converts a signal under test into an intermediate frequency (IF) signal. A band pass filter (12) passes a specific frequency band of the IF signal. A wide band pass filter (22) passes a wider frequency band including said specific frequency band of the IF signal. An analog to digital converter (16) converts the output signal of the BPF (12) into a digital signal. A fast analog to digital converter (26) converts the output signal of the wide band pass filter (22). A FIFO memory (28) decelerates the data transfer rate of the output signal of the fast analog to digital converter (26). A multiplexer (30) selects one of the output signals of the ADC (16) or the FIFO memory (28). A digital signal processor (18) conducts some process, such as FFT, to the output signal of the multiplexer (30). A memory (20) stores the output data of the DSP (18). A trigger detector (32) detects whether the output signal of the DSP (18) satisfies a predetermined trigger condition and generates a trigger signal if the trigger condition is satisfied. A memory controller (34) controls the storage operation of the FIFO memory (28) according to the trigger signal.
摘要翻译： 根据本发明的宽带信号分析器适用于分析宽频带信号，同时保持信号质量即使可以以低成本实现。 它具有窄且宽的频带通过，其可以分别由根据频带的最佳设备构成。 宽频带通过的数据存储操作由触发信号控制，触发信号通过使用从窄频带通路导出的数据来检测。 变频器（10）将被测信号转换成中频（IF）信号。 带通滤波器（12）通过IF信号的特定频带。 宽带通滤波器（22）通过包括IF信号的所述特定频带的较宽频带。 模数转换器（16）将BPF（12）的输出信号转换为数字信号。 快速模数转换器（26）转换宽带通滤波器（22）的输出信号。 FIFO存储器（28）使快速模数转换器（26）的输出信号的数据传输速率减速。 多路复用器（30）选择ADC（16）或FIFO存储器（28）的输出信号之一。 数字信号处理器（18）将诸如FFT的一些处理传送到多路复用器（30）的输出信号。 存储器（20）存储DSP（18）的输出数据。 触发检测器（32）检测DSP（18）的输出信号是否满足预定的触发条件，如果触发条件满足则产生触发信号。 存储器控制器（34）根据触发信号控制FIFO存储器（28）的存储操作。
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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
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.
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公开(公告)号：EP0945731A1
公开(公告)日：1999-09-29
申请号：EP97946823.8
申请日：1997-12-09
IPC分类号： G01R23/16
CPC分类号： G01R23/16
摘要： This invention relates to a new type real time signal analyzer that has both merits of a conventional real time FFT analyzer and a conventional vector signal analyzer and clears both demerits of them. This apparatus has a FFT processor 14 for FFT processing time domain data in real time, a FIFO memory 22 for delaying the time domain data before the FFT process, and a double port memory 24 for storing FFT processed frequency data from the FFT processor 14 and delayed time domain data read out from the FIFO memory 22. The delay time of the FIFO memory 22 is set up according to the process time of the FFT processor 14 that allows to secure time correspondence between the delayed time domain data and the frequency domain data. Therefore it respectively provides the data of the time domain and the frequency domain in real time at the same time that are synchronized each other.
摘要翻译： 本发明涉及一种新型实时信号分析仪，它具有传统的实时FFT分析仪和常规矢量信号分析仪的优点，并且清除了它们的两个缺点。 该装置具有用于实时FFT处理时域数据的FFT处理器14，用于在FFT处理之前延迟时域数据的FIFO存储器22和用于存储来自FFT处理器14的FFT处理的频率数据的双端口存储器24，以及 延迟的时域数据从FIFO存储器22读出。FIFO存储器22的延迟时间是根据FFT处理器14的处理时间来设置的，该处理器14允许保证延迟时域数据与频域数据之间的时间对应 。 因此它分别同时提供时域和频域的数据，同时彼此同步。
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公开(公告)号：EP0776478B1
公开(公告)日：1999-05-12
申请号：EP95927651.0
申请日：1995-08-09
发明人： KÖCK, Gerd
CPC分类号： G01R19/25 , H02J13/0013 , Y02E60/7807 , Y04S40/12
摘要： In the method proposed, spectral values are calculated from sampled network-voltage or network-current values by discrete Fourier transform techniques. Of these spectral values, only those which are greater than a given threshold value (SW) are transmitted further or stored. In order to reconstruct the sampled values, the missing spectral values are assumed to be zero. In general, only those spectral values are transmitted further or stored which are associated with a fault and a previous and subsequent history of several seconds. The invention is suitable for use in fault recorders.
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