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    METHOD AND APPARATUS FOR TIME VARYING SPECTRUM ANALYSIS.
    7.
    发明公开
    METHOD AND APPARATUS FOR TIME VARYING SPECTRUM ANALYSIS. 失效
    方法和装置采用暂时变化频率范围的分析。

    公开(公告)号：EP0632899A4

    公开(公告)日：1996-09-11

    申请号：EP93907584

    申请日：1993-03-17

    申请人： NAT INSTR CORP

    发明人： QIAN SHIE ,  CHEN DAPANG

    IPC分类号： G01R23/16 ,  G01R23/18

    CPC分类号： G01R23/16

    摘要： A signal analyzer (10) generates a time varying spectrum for input signals (16) characterized by frequency components which change in time. The signal analyzer (10) includes a converter (11) generating a sequence of digital signals representative of an input signal (16). The sequence of digital signals is supplied to a digital signal processor (12) which computes orthogonal-like discrete Gabor transform coefficients Cm,n in response to the sequence, and a time varying spectrum (17) of the input signal energy in response to the coefficients. Finally, a data processor (14) processes the spectrum (17) for further analysis or display (15). One particular analysis step for which the time varying spectrum is useful is in partitioning the input signal into separate components. The orthogonal-like discrete Gabor transform coefficients are computed using a non-periodic, localized discrete window function h and a discrete auxiliary function y, similar to h. The time varying spectrum is computed utilizing a cross-term deleted Wigner-Ville distribution.

    Method and apparatus for aiding manual instrument settings by displaying estimates of future measurement results
    8.
    发明公开
    Method and apparatus for aiding manual instrument settings by displaying estimates of future measurement results 失效
    Verfahren und Anordnung zurUnterstützungdes manuellen Einstellens eines Instrumentes。

    公开(公告)号：EP0335729A2

    公开(公告)日：1989-10-04

    申请号：EP89303193.0

    申请日：1989-03-31

    申请人： Hewlett-Packard Company

    发明人： Kilk, Eric ,  Smith, David A. ,  Schmidt, Alan W.

    IPC分类号： G01R23/16 ,  G01R23/18 ,  G01R27/30 ,  G01R35/00

    CPC分类号： G01R23/173 ,  G01R15/08 ,  G01R27/28

    摘要： Upon the adjustment of a control setting of a test instrument, the current data (taken before the change is effected) is manipulated by recalculating the trace data in light of any adjustment that is entered by a user. This represents an estimate of the effect of the adjustment in the control setting, and this estimate is redrawn on a display device. This modified image is preferably displayed before the real new image is ready to be displayed. This provides immediate feedback to the user so that adjustments can be effected without slowing the measurement process. Various embodiments provide panning or repositioning the trace left and right while changing the x-axis center frequency; stretching or compressing the trace (spanning) while changing the frequency span; or using a combination for adjustments to only the start or stop frequency. In one embodiment, the estimate can be displayed only after the user has committed to having a new measurement performed. Alternatively, in another embodiment, estimates can be displayed continuously while the user is making adjustments and before the user has committed to performing a new measurement. Having a test instrument display to the user an estimate of a future measurement while adjusting the control settings of the instrument in order to aid knob and button settings facilitates making adjustments visually during measurements which take longer than a fraction of a second. By having an immediate response on the display device, the user is not required to make blind changes.

    摘要翻译： 在调整测试仪器的控制设置时，通过根据用户输入的任何调整重新计算跟踪数据来操纵当前数据（在更改之前进行）。 这表示在控制设置中对调整的影响的估计，并且在显示设备上重绘该估计。 该修改后的图像优选地在真实新图像准备好显示之前被显示。 这为用户提供即时反馈，从而可以在不减慢测量过程的情况下进行调整。 各种实施例在改变x轴中心频率的同时提供左右移动或重新定位轨迹; 在改变频率范围的同时拉伸或压缩轨迹（跨越）; 或使用组合仅对开始或停止频率进行调整。 在一个实施例中，估计可以仅在用户已经承诺进行新的测量之后才被显示。 或者，在另一个实施例中，可以在用户做出调整之前和用户已经承诺执行新的测量之前连续地显示估计。 测试仪器向用户显示未来测量的估计，同时调整仪器的控制设置，以帮助旋钮和按钮设置便于在测量期间在视觉上进行调整，这需要比一秒钟更长的时间。 通过在显示装置上立即响应，用户不需要做出盲目的改变。