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    Measuring method by spectrum analyzer
    1.
    发明授权
    Measuring method by spectrum analyzer 失效
    频谱分析仪测量方法

    公开(公告)号：US06229316B1

    公开(公告)日：2001-05-08

    申请号：US08707032

    申请日：1996-09-03

    申请人： Takayoshi Fukui ,  Kouichi Yamashita ,  Takahiro Yamaguchi ,  Osamu Aoyama ,  Takashi Kosuge ,  Yoshiaki Miyamae ,  Toshiharu Kasahara ,  Hiroaki Takaoku

    发明人： Takayoshi Fukui ,  Kouichi Yamashita ,  Takahiro Yamaguchi ,  Osamu Aoyama ,  Takashi Kosuge ,  Yoshiaki Miyamae ,  Toshiharu Kasahara ,  Hiroaki Takaoku

    IPC分类号： G01R2316

    CPC分类号： G01R23/16 ,  G01R29/26

    摘要： A spectrum analyzer in which automatic setting of parameters such as band width is done by the analyzer without manual operator input and noise measurements are determined and displayed to the operator. This is accomplished by an input signal being supplied to a frequency mixer via an input variable attenuator. The frequency of the input signal is mixed with the frequency of a local signal from a frequency sweep generator. The mixed signal is then supplied to a band pass filter and the output of the filter is amplified by an amplifier. The frequency of the amplified output is mixed with the frequency of a local signal from a local oscillator by a frequency mixer. The intermediate frequency signal is taken out by a band pass filter and the output is detected by a detector. The detected output is converted into a digital signal by an A/D converter after passing through a low pass filter and the digital signal is stored in a buffer memory. A CPU sets an attenuation amount. The CPU also controls a frequency sweep generator by controlling a ramp voltage generator through a timing controller. The CPU sets a sweep frequency band, a band width RBW, a band width VBW, and a sampling period, as well as a display control of the data stored in the buffer memory on a display unit.

    摘要翻译： 频谱分析仪，其中通过分析仪完成诸如带宽等参数的自动设置，无需手动操作员输入和噪声测量，并将其显示给操作者。 这通过经由输入可变衰减器被提供给混频器的输入信号来实现。 输入信号的频率与来自频率扫描发生器的本地信号的频率混合。 然后将混合信号提供给带通滤波器，并且滤波器的输出由放大器放大。 放大输出的频率通过混频器与来自本地振荡器的本地信号的频率混合。 中频信号由带通滤波器取出，输出由检测器检测。 在通过低通滤波器之后，A / D转换器将检测到的输出转换成数字信号，数字信号存储在缓冲存储器中。 CPU设置衰减量。 CPU还通过定时控制器控制斜坡电压发生器来控制频率扫描发生器。 CPU设置扫描频带，带宽RBW，带宽VBW和采样周期，以及在显示单元上存储在缓冲存储器中的数据的显示控制。

    Device for measuring the average value of pulse signals
    3.
    发明授权
    Device for measuring the average value of pulse signals 失效
    用于测量脉冲信号平均值的装置

    公开(公告)号：US5416798A

    公开(公告)日：1995-05-16

    申请号：US965272

    申请日：1993-08-20

    申请人： Masaaki Hirose ,  Kazuo Katoh ,  Yutaka Ueki ,  Yohei Hirakoso ,  Mitsunori Satoh ,  Takashi Kosuge

    发明人： Masaaki Hirose ,  Kazuo Katoh ,  Yutaka Ueki ,  Yohei Hirakoso ,  Mitsunori Satoh ,  Takashi Kosuge

    IPC分类号： G01R19/00 ,  G01R29/08 ,  G01R29/26 ,  H04B3/46 ,  H04B17/00

    CPC分类号： G01R19/003 ,  G01R29/0892 ,  G01R29/26

    摘要： The device of the present invention is used to measure the intensity of a disturbing wave and measures an average value of impulsive noise. The invention permits accurate and short-time measurements. Impulsive noise, which is input via a variable attenuator, a frequency converter, an intermediate-frequency amplifier and a band-pass filter of a 9 or 120 kHz pass frequency, is provided to a linear detector. The detected output is applied to a low-pass filter which is composed of CR elements and whose cut-off frequency is tens of kilohertz. By the low-pass filter, the peak value of the detected output is lowered and its width is increased. The filter output is converted by an A-D converter to a digital signal. Digital values at respective sample points in the digital signal of one frame are added by an arithmetic circuit, and the added value is divided by the number of samples to obtain an average value, which is displayed.

    摘要翻译： PCT No.PCT / JP92 / 00677 Sec。 371日期：1993年8月20日 102（e）日期1993年8月20日PCT提交1992年5月26日PCT公布。 第WO92 / 21984号公报 日本1992年12月10日。本发明的装置用于测量干扰波的强度并测量脉冲噪声的平均值。 本发明允许精确和短时间的测量。 通过可变衰减器，频率转换器，中频放大器和9或120kHz通过频率的带通滤波器输入的脉冲噪声被提供给线性检测器。 检测到的输出被施加到由CR元件组成并且截止频率为几十赫兹的低通滤波器。 通过低通滤波器，检测输出的峰值降低，其宽度增加。 滤波器输出由A-D转换器转换为数字信号。 通过算术电路将一帧的数字信号中的各采样点的数字值相加，并将该相加值除以采样数，得到显示的平均值。

    Measuring method using a spectrum analyzer
    4.
    发明授权
    Measuring method using a spectrum analyzer 失效
    使用频谱分析仪的测量方法

    公开(公告)号：US06359429B1

    公开(公告)日：2002-03-19

    申请号：US09179023

    申请日：1998-10-26

    申请人： Michiaki Arai ,  Takashi Kosuge

    发明人： Michiaki Arai ,  Takashi Kosuge

    IPC分类号： G01R2316

    CPC分类号： G01R23/16

    摘要： A method for automatically setting a reference level is provided. A frequency-converted output of frequency converter 13 is branched and the branched output is further frequency-converted by another frequency converter 33. The thus frequency-converted signal is converted to a digital signal by an AD converter 31 and the digital signal is once stored in a memory 35. The digital data is read out from the memory 35 and a check is made to see if the AD converter 31 was overflown. If the AD converter 31 was overflown, an attenuation amount of a first stage attenuator 12 is increased from an initially set value to acquire a data again. If the AD converter 31 was not overflown, a check is made to see if a peak value of the digital data is within a range of 85%-65% of the full scale of the AD converter 31. If a peak value of the digital data is not within the range of 85%-65% of the full scale, a calculation is performed to increase/decrease the gain of an amplifier 15. If a peak value is within the range, this value is set as a reference level.

    摘要翻译： 提供了一种自动设置参考电平的方法。 频率转换器13的频率转换输出被分支，并且分支输出由另一个频率转换器33进一步进行频率转换。这样被频率转换的信号由AD转换器31转换成数字信号，数字信号被一次存储 在存储器35中读出数字数据，并检查AD转换器31是否溢出。 如果AD转换器31溢出，则第一级衰减器12的衰减量从初始设定值增加，再次获取数据。 如果AD转换器31没有溢出，则检查数字数据的峰值是否在AD转换器31的满量程的85％-65％的范围内。如果数字 数据不在满量程的85％-65％的范围内，执行用于增加/减小放大器15的增益的计算。如果峰值在该范围内，则该值被设置为参考电平。

    Spectrum analyzer having image frequency eliminating device
    5.
    发明授权
    Spectrum analyzer having image frequency eliminating device 失效
    具有图像频率消除装置的频谱分析仪

    公开(公告)号：US5736845A

    公开(公告)日：1998-04-07

    申请号：US555759

    申请日：1995-11-09

    申请人： Takashi Kosuge

    发明人： Takashi Kosuge

    IPC分类号： G01R23/173 ,  G01R13/24

    CPC分类号： G01R23/173

    摘要： A frequency spectrum analyzer includes a display for showing frequency spectrums in a frequency domain versus power level form, a local oscillator which is driven by a sweep signal to repeatedly cause a frequency sweep of a local signal wherein the local oscillator and the display operate in synchronism with the sweep signal, an intermediate frequency filter whose center frequency is an intermediate frequency for transmitting intermediate frequency signals, a frequency mixer for mixing an input signal to be measured and the local signal and generating the intermediate frequency signals whose frequency is a difference of the input signal and fundamental and harmonic components of the local signal, a detector for rectifying the intermediate frequency signal from the intermediate frequency filter wherein an output of the detector shows frequency spectrums of a true frequency spectrum of the input signal and image spectrums produced by the mixer, a sweep offset control for alternately causing a frequency shift in the frequency sweep in the local signal wherein the frequency shift is equal to f.sub.if2 .times.2/N, where f.sub.if2 is the intermediate frequency and N is a harmonic number of the local signal, and an image removal processor for monitoring the output of the detector and identifying the true frequency spectrum of the input signal and the image spectrums on the basis of positional changes between the frequency sweep without the frequency shift and the frequency sweep involving the frequency shift in the local signal.

    摘要翻译： 频谱分析仪包括用于显示频域与功率电平形式的频谱的显示器，由扫描信号驱动以重复地使本地振荡器和显示器同步操作的本地信号的频率扫描的本地振荡器 利用扫描信号，中心频率是用于发送中频信号的中频的中频滤波器，用于混合要测量的输入信号和本地信号的混频器，并产生频率为 输入信号和本地信号的基波和谐波分量，用于对来自中频滤波器的中频信号进行整流的检波器，其中检波器的输出显示输入信号的真频率频谱和由混频器产生的图像频谱 ，用于交替起作用的扫掠偏移控制 在本地信号中的频率扫描中的频移，其中频移等于fif2x2 / N，其中fif2是中间频率，N是本地信号的谐波数，以及图像去除处理器，用于监视 检测器，并基于频率扫描与频率偏移之间的位置变化以及涉及局部信号中的频移的频率扫描来识别输入信号和图像频谱的真实频谱。