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[参考译文] LMX2592:更改输出频率时,会出现并消失瞬时闪烁频率。

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请注意,本文内容源自机器翻译,可能存在语法或其它翻译错误,仅供参考。如需获取准确内容,请参阅链接中的英语原文或自行翻译。

https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/589381/lmx2592-when-changing-the-output-frequency-some-flicker-frequency-instantaneous-appear-and-disappear

部件号:LMX2592

在此过程中,6.8GHz信号的输出频率没有问题。 修改输出频率时,仅修改R44和R0寄存器,其中reg44_data更改约1位,频谱将看到瞬时闪烁。

如果输出频率更改为120Hz (600Hz频率跳频约为6.8G),则会出现大量伪频率。

我想问一下,修改十进制N分频器瞬时噪声是锁相环的固有特征吗? 是否有办法消除或减少这种现象?

    修改输出频率时,仅修改R44和R0寄存器,其中reg44_data更改约8位。

 WriteOneByte (reg44_data);//R44,reg44_data=0x2CAC1A;

      WriteOneByte (0x0.0227万C);//R0

设备初始为以下参数:

WriteOneByte (0x4000AF);//R64
WriteOneByte (0x3E0000);//R62
WriteOneByte (0x3D0001);//R61
WriteOneByte (0x3B0000);//R59
WriteOneByte (0x3003FD);//R48
WriteOneByte (0x2F08CF);//R47
WriteOneByte (0x2E38A2);//R46
WriteOneByte (0x2D36E2);//R45
WriteOneByte (0x2CAC1A);//R44
WriteOneByte (0x2B0000);//R43
WriteOneByte (0x2A0000);//R42
WriteOneByte (0x29FFFF);//R41
WriteOneByte (0x28FFFF);//R40
WriteOneByte (0x27.8204万);//R39
WriteOneByte (0x260D58);//R38
WriteOneByte (0x25.5万);//R37
WriteOneByte (0x24.0401万);//R36
WriteOneByte (0x23.0219万);//R35
WriteOneByte (0x22C3D0);//R34
WriteOneByte (0x21.421万);//R33
WriteOneByte (0x20.421万);//R32
WriteOneByte (0x1F0401);//R31
WriteOneByte (0x1E0034);//R30
WriteOneByte (0x1D0084);//R29
WriteOneByte (0x1C2924);//R28
WriteOneByte (0x19万);//R25
WriteOneByte (0x18.0509万);//R24
WriteOneByte (0x17.8842万);//R23
WriteOneByte (0x16.23万);//R22
WriteOneByte (0x1.4012万C);//R20
WriteOneByte (0x13.0965万);//R19
WriteOneByte (0x0E0F7B);//R14
WriteOneByte (0x0D4000);//R13
WriteOneByte (0x0C7014);//R12
WriteOneByte (0x0B0028);//R11
WriteOneByte (0x0A10D8);//R10
WriteOneByte (0x090B02);//R9
WriteOneByte (0x8.1084万);//R8
WriteOneByte (0x0728B2);//R7
WriteOneByte (0x4.1943万);//R4
WriteOneByte (0x2.05万);//R2
WriteOneByte (0x1.0808万);//R1
WriteOneByte (0x0.0227万C);//R0



  • 请注意,本文内容源自机器翻译,可能存在语法或其它翻译错误,仅供参考。如需获取准确内容,请参阅链接中的英语原文或自行翻译。
    您好,

    感谢您的咨询。 我已通知工程师作出响应。

    73岁
    Timothy
  • 请注意,本文内容源自机器翻译,可能存在语法或其它翻译错误,仅供参考。如需获取准确内容,请参阅链接中的英语原文或自行翻译。
    您好,

    您是指频率变化期间的闪烁吗? 每当您更改频率并使用R0进行校准时,您都会触发校准序列,该序列将扫描频率以查找目标值,然后您将在瞬态图解中看到频率的突然变化。
  • 请注意,本文内容源自机器翻译,可能存在语法或其它翻译错误,仅供参考。如需获取准确内容,请参阅链接中的英语原文或自行翻译。
    非常感谢