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噪声信号发生器 DM1663/1661(白噪声、粉红噪声)

噪声信号发生器 DM1663/1661(白噪声、粉红噪声)
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  • 噪声信号发生器 DM1663/1661(白噪声、粉红噪声)
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DM1663/1661
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噪声信号发生器 DM1663/1661(白噪声、粉红噪声)

白噪声、粉红噪声信号发生器 DM1663(DM1661)

厂家: 国产
尺寸: 31x10x33cm

本机是通用白噪声和粉红噪声发生器。它能输出2Hz至200KHz和2Hz至20KHz均匀频谱密度,幅度分布为高斯分布的白噪声及2Hz至20KHz、2Hz至200KHz频率范围内的粉红噪声四种信号。 它的主要用途是作为测试设备中模拟在实际电路和系统中产生的噪声源,例如用来测量放大器的极限灵敏度,测量接收机的噪声系统数,测量自动控制系统及遥控系统的抗干扰度,测量雷达及导航系统的作用距离等。本仪器和频谱分析仪,带通滤波器,记录仪绘图仪等配合广泛应用于电声,水声,振动,建筑,电影及通讯等领域的测量。

  • 输出信号频谱密度:
    1. 20Hz-20kHz:
     白噪声:在衰减输出或负载开路时,不均匀度在±1dB内,输出功率时在±1.5dB内。
     粉红噪声:在衰减输出或负载端开路时,不均匀度在 ±1.5dB内,输出功率时在±2dB内。
    2. 2Hz-200kHz:
     白噪声: 在衰减输出或输出开路时,不均匀度在±1dB内。
     粉红噪声: 在衰减输出或输出开路时,不均匀度在 ±1.5dB内。
  • 输出幅度分布:频率范围在2Hz至20Hz和2Hz至200kHz内,幅度在7伏有效值内,为对称高斯分布。
  • 输出电平及输出功率:输出幅度为7伏有效值内,衰减器输出分为8档,每档衰减为10dB,其精度为±1dB,输出功率不小于3瓦(8Ω负载)。
  • 输出为低阻抗输出,衰减器输出阻抗约为50Ω。
  • 信噪比:不低于60dB。
  • 电压表指示为有效值,满度指示为:10伏;3伏;1伏; 0.3伏四档,由衰减器控制自动转换,
     衰减器为0dB时, 满度为10伏;
     -0dB时, 满度为3伏;
     -20dB时, 满度为1伏;
     -30dB时, 满度为0.3伏。
    再增大衰减量满度值不变。
  • 整机消耗功率约为30VA。

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