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    • 24. 发明授权
    • Vector analyzer with display markers and linear transform capability
    • 矢量分析仪带有显示标记和线性变换功能
    • US4818931A
    • 1989-04-04
    • US16308
    • 1987-02-19
    • Andrew H. NaegeliJuan GrauRichard A. Nyquist
    • Andrew H. NaegeliJuan GrauRichard A. Nyquist
    • G01R13/22G01R13/20G01R13/30G01R13/34G01R23/16
    • G01R13/34G01R13/206G01R13/208G01R13/30
    • A vector analyzer incorporates a set of five types of markers for the display, which facilitate the visual analysis of the magnitude, phase and time relationships of the I and Q components of the modulation states displayed. The five markers are: an I marker, a Q marker, a magnitude marker, a phase marker and a time marker. The I and Q markers indicate amplitude in the I and Q coordinates displayed on the X-Y displays. The magnitude marker indicates amplitude on the radial coordinate of the X-Y displays. The phase marker indicates relative phase on the angular coordinate of the X-Y displays. The time marker indicates the time coordinate on the displays, and controls the time instant displayed. The analyzer also incorporates a circuit for performing linear transforms on the I, Q, and time data which allows real time adjustment of the sampled signals and enables the signals to be displayed in a three dimensional projection mode. The linear transform can be used to correct the display for three common sources of error in vector modulated signals: amplitude imbalance, phase errors, and quadrature errors. After the display has been corrected, the correction factors are a measure of the errors in the input signal, or in the device demodulating the input signal.
    • 矢量分析仪包含一组五种类型的显示标记,便于对显示的调制状态的I和Q分量的幅度,相位和时间关系进行可视化分析。 五个标记是:I标记,Q标记,幅度标记,相位标记和时间标记。 I和Q标记表示显示在X-Y显示屏上的I和Q坐标的幅度。 幅度标记表示X-Y显示器的径向坐标上的振幅。 相位标记表示X-Y显示器的角坐标上的相对相位。 时间标记表示显示屏上的时间坐标,并控制显示的时刻。 该分析器还包括用于对I,Q和时间数据执行线性变换的电路,其允许对采样信号进行实时调整,并使信号以三维投影模式显示。 线性变换可用于校正矢量调制信号中三个常见误差源的显示:振幅不平衡,相位误差和正交误差。 在显示器被校正之后,校正因子是对输入信号中的误差的量度,或在解调输入信号的装置中。