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    • 4. 发明公开
    • Locking scales for waveform displays
    • Verriegelung von SkalenfürWiedergabe von Kurvenformanzeigen。
    • EP0284078A1
    • 1988-09-28
    • EP88104773.2
    • 1988-03-24
    • TEKTRONIX INC.
    • Slavin, Keith R.
    • G01R13/30
    • G01R13/345G01R13/30H04N17/00
    • A method for locking scales to a waveform display uses reference points from the waveform to determine starting scale points. Based upon the starting scale points and the characteristics of the waveform the scales are calculated. Any changes in gain in the waveform are applied to the scales so that the scales change in direct proportion to the waveform. The field/line numbers of a television video signal are tracked and displayed on the waveform display to identify that portion of the waveform relative to a picture frame which is being displayed.
    • 用于将比例尺锁定到波形显示器的方法使用来自波形的参考点来确定起始刻度点。 根据开始的刻度点和波形的特性,计算刻度。 波形增益的任何变化都会应用于刻度尺,以便刻度随波形成正比变化。 电视视频信号的场/行号被跟踪并显示在波形显示器上,以识别相对于正被显示的画面的波形部分。
    • 7. 发明公开
    • A test and measurement instrument having telecommunications mask testing capability with an autofit to mask feature
    • 电信公司 - Testfähigkeitaufweisendes Test- und Messinstrument mit automatischer Anpassung an die Maske
    • EP1089079A2
    • 2001-04-04
    • EP00308301.1
    • 2000-09-22
    • Tektronix, Inc.
    • Letts, Peter J.
    • G01R13/20G01R19/25
    • H04M3/30G01R13/30H04L1/24H04M3/005H04M3/305
    • Initial mask and waveform positions on a display screen may be determined by an AUTOSET TO MASK function. Upon detection of violations that occur after the AUTOSET TO MASK function is complete, control for further alignment of the waveform under test and the mask is assumed by an AUTOFIT TO MASK function. Comparison of the mask pixels and waveform pixels to detect collision between a waveform pixel and a mask pixel (i.e., a mask violation) is performed substantially in real time, as the pixels are being composited into the raster memory by the rasterizer. In the event of a mask violation, a mask violation signal is generated. In a further embodiment of the invention, in response to the mask violation signal, the AUTOFIT TO MASK function uses display rasterization to automatically redraw the waveform at a new location, until the waveform fits within the mask. In yet another embodiment, in response to the mask violation signal, the AUTOFIT TO MASK function automatically redraws the telecom mask at a new location until the waveform fits within the mask.
    • 显示屏幕上的初始屏蔽和波形位置可以由AUTOSET TO MASK功能确定。 在检测到AUTOSET TO MASK功能完成后出现的违规情况,通过AUTOFIT TO MASK功能,可以进行进一步对准被测波形和掩码的控制。 基本上实时地执行用于检测波形像素和掩模像素之间的碰撞的掩模像素和波形像素的比较(即,由光栅化器将像素合成到光栅存储器中)。 在面板违规的情况下,会产生掩码违规信号。 在本发明的又一个实施例中,响应于掩模违规信号,自动到掩蔽功能使用显示光栅化来自动地重新绘制新位置处的波形,直到波形适合于掩模内。 在另一个实施例中,响应于屏蔽违规信号,AUTOFIT TO MASK功能在新位置自动重新绘制电信掩码,直到波形适合于掩模。