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公开(公告)号：US20080177508A1
公开(公告)日：2008-07-24
申请号：US11781432
申请日：2007-07-23
IPC分类号： H04B15/00
CPC分类号： G01R13/0254
摘要： A noise rejection filter for a trigger circuit uses an algorithm that updates the filter output monotonically so long as the signal slope remains unchanged, maintains the filter output at a constant level when the signal slope changes but the difference between the sample value and the filter output is less than or equal to a hysteresis value, and changes the signal slope while updating the filter output when the difference is greater than the hysteresis value. This maintains the peaks of the input signal at the filter output. The noise rejection filter may be used in a trigger circuit prior to a comparator so that the trigger signal from the comparator accurately reflects the signal pulse width at a desired trigger level and trigger events are detected when the desired trigger level is near the peaks of the input signal.
摘要翻译： 用于触发电路的噪声抑制滤波器使用仅当信号斜率保持不变时单调更新滤波器输出的算法，当信号斜率改变时，将滤波器输出保持在恒定电平，而采样值与滤波器输出之间的差异 小于或等于滞后值，并且当差值大于滞后值时，更新滤波器输出时改变信号斜率。 这保持了滤波器输出处的输入信号的峰值。 噪声抑制滤波器可以在比较器之前的触发电路中使用，使得来自比较器的触发信号精确地将信号脉冲宽度反映到期望的触发电平，并且当期望的触发电平接近峰值时检测触发事件 输入信号。
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公开(公告)号：US07610178B2
公开(公告)日：2009-10-27
申请号：US11781432
申请日：2007-07-23
CPC分类号： G01R13/0254
摘要： A noise rejection filter for a trigger circuit uses an algorithm that updates the filter output monotonically so long as the signal slope remains unchanged, maintains the filter output at a constant level when the signal slope changes but the difference between the sample value and the filter output is less than or equal to a hysteresis value, and changes the signal slope while updating the filter output when the difference is greater than the hysteresis value. This maintains the peaks of the input signal at the filter output. The noise rejection filter may be used in a trigger circuit prior to a comparator so that the trigger signal from the comparator accurately reflects the signal pulse width at a desired trigger level and trigger events are detected when the desired trigger level is near the peaks of the input signal.
摘要翻译： 用于触发电路的噪声抑制滤波器使用仅当信号斜率保持不变时单调更新滤波器输出的算法，当信号斜率改变时，将滤波器输出保持在恒定电平，而采样值与滤波器输出之间的差异 小于或等于滞后值，并且当差值大于滞后值时，更新滤波器输出时改变信号斜率。 这保持了滤波器输出处的输入信号的峰值。 噪声抑制滤波器可以在比较器之前的触发电路中使用，使得来自比较器的触发信号精确地将信号脉冲宽度反映到期望的触发电平，并且当期望的触发电平接近峰值时检测触发事件 输入信号。
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3.发明授权Characterizing newly acquired waveforms for identification of waveform anomalies 失效表征新采集的波形，用于识别波形异常公开(公告)号：US07359810B2
公开(公告)日：2008-04-15
申请号：US10961445
申请日：2005-03-18
IPC分类号： G01R13/00
CPC分类号： G01R13/029
摘要： A method of characterizing a newly acquired waveform with respect to previously acquired waveforms during monitoring of a generally repetitive signal, where the previously acquired waveforms have been rasterized into a two-dimensional array of memory locations, reads history values for those memory locations associated with an active portion of the newly acquired waveform, compares the history values with history value ranges, increments a count for one of a plurality of recent pixel counters corresponding to the history value ranges, each counter having a different history value range, and modifies the history values in the memory locations. From the counts accumulated for each of the history value ranges the variability of the newly acquired waveform from the generally repetitive signal is determined.
摘要翻译： 在先前获取的波形已经被光栅化成二维存储器阵列的情况下，在监视一般重复的信号期间，相对于先前获取的波形来表征新采集的波形的方法，读取与 将历史值与历史值范围进行比较，对与历史值范围对应的多个最近的像素计数器中的一个像素计数器进行计数，每个计数器具有不同的历史值范围，并修改历史值 在内存位置。 根据历史值范围中的每一个积累的计数，确定从一般重复信号得到的新采集的波形的变化性。
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公开(公告)号：US10107649B2
公开(公告)日：2018-10-23
申请号：US12564800
申请日：2009-09-22
摘要： A test and measurement instrument including a plurality of digitizers, each digitizer configured to digitize an input signal to generate a digitized signal; a signal processor configured to combine at least two of the digitized signals from the digitizers into a combined signal; and a circuit configured to receive the combined signal.
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公开(公告)号：US07834780B2
公开(公告)日：2010-11-16
申请号：US11385170
申请日：2006-03-20
IPC分类号： H03M7/00
CPC分类号： G01R13/0272
摘要： A waveform compression and display technique saves both a peak detected version (background version) and a decimated/lowpass filtered version (foreground version) of a sampled electrical signal. The two versions are displayed simultaneously overlaid together in a contrasting manner so as not to obscure information contained in either of them. The lowpass filtered version uses a series of simple lowpass filters with decimation to produce a single data stream from a plurality of data streams derived from the sampled electrical signal. The single data stream may then be subjected to additional filtering, such as a cascaded integrator-comb filter, to obtain a desired frequency bandwidth. When displayed, the peak detect pixels adjacent the decimated/lowpass filtered pixels may be adjusted in intensity so that the low frequency information of the lowpass filtered waveform is not lost, while the peak detect pixels further from the lowpass filtered pixels are intensified to highlight the high frequency information. Alternatively the background version intensity may be controlled by a user control over a first range from zero to a predetermined maximum, and the foreground version may be controlled over a second range from a default intensity to a maximum, saturated intensity.
摘要翻译： 波形压缩和显示技术节省了采样电信号的峰值检测版本（背景版本）和抽取/低通滤波版本（前景版本）。 这两个版本以对比的方式同时叠加在一起，以免遮蔽其中任何一个中的信息。 低通滤波器版本使用一系列具有抽取的简单低通滤波器，以从采样的电信号导出的多个数据流产生单个数据流。 然后可以对单个数据流进行额外的滤波，例如级联的积分器梳状滤波器，以获得期望的频率带宽。 当显示时，与抽取/低通滤波的像素相邻的峰值检测像素的强度可以被调整，使得低通滤波波形的低频信息不会丢失，而从低通滤波像素进一步增加峰值，从而突出显示 高频信息。 或者，背景版本强度可以由用户在从零到预定最大值的范围内的控制来控制，并且可以在从默认强度到最大饱和强度的第二范围内控制前景版本。
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公开(公告)号：US20140002508A1
公开(公告)日：2014-01-02
申请号：US13538978
申请日：2012-06-29
IPC分类号： G09G5/10
CPC分类号： G09G5/10 , G09G5/00 , G09G2320/0271
摘要： Disclosed is a test and measurement instrument that includes a signal input structured to receive a modulated radio frequency (RF) signal under test and a demodulator structured to extract a digital signal from the received modulated RF signal. The extracted digital signal has a measurable parameter. The instrument also includes a display controller structured to display the extracted demodulated signal at one of at least two different intensities based on the measured parameter of the digital signal. In other embodiments the signal need not be an RF signal. Methods of operation are also described.
摘要翻译： 公开了一种测试和测量仪器，其包括被构造为接收被测试的调制射频（RF）信号的信号输入和被构造成从接收的调制RF信号中提取数字信号的解调器。 提取的数字信号具有可测量的参数。 仪器还包括显示控制器，其被构造为基于所测量的数字信号的参数，以至少两个不同的强度之一显示所提取的解调信号。 在其它实施例中，信号不需要是RF信号。 还描述了操作方法。
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7.发明授权Signal acquisition system having reduced probe loading of a device under test 有权信号采集系统具有减少被测设备的探头负载公开(公告)号：US08436624B2
公开(公告)日：2013-05-07
申请号：US12846721
申请日：2010-07-29
申请人： Josiah A. Bartlett , Ira G. Pollock , Daniel G. Knierim , Lester L. Larson , Scott R. Jansen , Kenneth P. Dobyns , Michael Duane Stevens
发明人： Josiah A. Bartlett , Ira G. Pollock , Daniel G. Knierim , Lester L. Larson , Scott R. Jansen , Kenneth P. Dobyns , Michael Duane Stevens
IPC分类号： G01R35/00
CPC分类号： G01R35/005 , G01R1/06766
摘要： A signal acquisition system has a signal acquisition probe having probe tip circuitry coupled to a resistive center conductor signal cable. The resistive center conductor signal cable of the signal acquisition probe is coupled to a compensation system in a signal processing instrument via an input node and input circuitry in the signal processing instrument. The signal acquisition probe and the signal processing instrument have mismatched time constants at the input node with the compensation system providing pole-zero pairs for maintaining flatness over the signal acquisition system frequency bandwidth.
摘要翻译： 信号采集系统具有信号采集探针，其具有耦合到电阻中心导体信号电缆的探针尖端电路。 信号采集探头的电阻中心导体信号电缆通过输入节点和信号处理仪器中的输入电路耦合到信号处理仪器中的补偿系统。 信号采集探头和信号处理仪器在输入节点处具有不匹配的时间常数，补偿系统提供极零对，以保持信号采集系统频率带宽的平坦度。
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公开(公告)号：US08278940B2
公开(公告)日：2012-10-02
申请号：US12846742
申请日：2010-07-29
申请人： Josiah A. Bartlett , Ira G. Pollock , Daniel G. Knierim , Lester L. Larson , Scott R. Jansen , Kenneth P. Dobyns
发明人： Josiah A. Bartlett , Ira G. Pollock , Daniel G. Knierim , Lester L. Larson , Scott R. Jansen , Kenneth P. Dobyns
IPC分类号： G01R35/00
CPC分类号： G01R1/06766 , G01R1/06772
摘要： A signal acquisition system has a signal acquisition probe having probe tip circuitry coupled to a resistive center conductor signal cable. The resistive center conductor signal cable is coupled to a compensation system in a signal processing instrument via an input node and input circuitry in the signal processing instrument. The signal acquisition probe and the signal processing instrument have mismatched time constants at the input node with the compensation system having an input amplifier with feedback loop circuitry and a compensation digital filter providing pole-zero pairs for maintaining flatness over the signal acquisition system frequency bandwidth.
摘要翻译： 信号采集系统具有信号采集探针，其具有耦合到电阻中心导体信号电缆的探针尖端电路。 电阻中心导体信号电缆通过信号处理仪器中的输入节点和输入电路耦合到信号处理仪器中的补偿系统。 信号采集探头和信号处理仪器在输入节点处具有不匹配的时间常数，其中补偿系统具有带反馈回路电路的输入放大器和提供极点对的补偿数字滤波器，用于在信号采集系统频率带宽上保持平坦度。
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9.发明申请公开(公告)号：US20110074390A1
公开(公告)日：2011-03-31
申请号：US12846721
申请日：2010-07-29
申请人： Josiah A. Bartlett , Ira G. Pollock , Daniel G. Knierim , Lester L. Larson , Scott R. Jansen , Kenneth P. Dobyns , Michael Duane Stevens
发明人： Josiah A. Bartlett , Ira G. Pollock , Daniel G. Knierim , Lester L. Larson , Scott R. Jansen , Kenneth P. Dobyns , Michael Duane Stevens
CPC分类号： G01R35/005 , G01R1/06766
摘要： A signal acquisition system has a signal acquisition probe having probe tip circuitry coupled to a resistive center conductor signal cable. The resistive center conductor signal cable of the signal acquisition probe is coupled to a compensation system in a signal processing instrument via an input node and input circuitry in the signal processing instrument. The signal acquisition probe and the signal processing instrument have mismatched time constants at the input node with the compensation system providing pole-zero pairs for maintaining flatness over the signal acquisition system frequency bandwidth.
摘要翻译： 信号采集系统具有信号采集探针，其具有耦合到电阻中心导体信号电缆的探针尖端电路。 信号采集探头的电阻中心导体信号电缆通过输入节点和信号处理仪器中的输入电路耦合到信号处理仪器中的补偿系统。 信号采集探头和信号处理仪器在输入节点处具有不匹配的时间常数，补偿系统提供极零对，以保持信号采集系统频率带宽的平坦度。
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公开(公告)号：US07855547B2
公开(公告)日：2010-12-21
申请号：US12104563
申请日：2008-04-17
IPC分类号： G01R13/20
CPC分类号： G01R13/0254
摘要： A method of drawing a waveform image in a no dead time acquisition system, where consecutive drawing frames overlap, uses a master/slave relationship between two fast rasterizers. The master rasterizer draws a first display frame in response to a first trigger event in a trigger signal derived from an input signal. The slave rasterizer draws a second display frame in response to a subsequent trigger event in the trigger signal. The portion of the second display frame that duplicates data contained in the first display frame is either (a) suppressed when the first and second display frames are combined to form the waveform image or (b) displayed in a different shade/color. Alternatively the first display frame may be compressed by 50% to form a first portion of the waveform image and the non-duplicative portion of the second display frame is compressed by 50% to form a second portion of the waveform image, the first and second portions being drawn contiguously when the first and second display frames are combined to form the waveform image.
摘要翻译： 在连续绘制帧重叠的无死区时间采集系统中绘制波形图像的方法使用两个快速光栅化器之间的主/从关系。 主光栅化器响应于从输入信号导出的触发信号中的第一触发事件来绘制第一显示帧。 从光栅化器响应于触发信号中的后续触发事件而绘制第二显示帧。 复制第一显示帧中包含的数据的第二显示帧的部分是（a）当第一和第二显示帧被组合以形成波形图像时抑制（a），或（b）以不同的阴影/颜色显示。 或者，第一显示帧可以被压缩50％以形成波形图像的第一部分，并且第二显示帧的非重复部分被压缩50％以形成波形图像的第二部分，第一和第二 当第一和第二显示帧被组合以形成波形图像时，被连续地绘制的部分。
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