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请问LMK04816的clkout6相较于clkout0 和clkout2有什么区别?

我自己设计的板子,同样的输出电路设计和同一路LDO 3.3V供电,用软件配置同样的频率输出频率2.4GHz和同样的电平标准LVPECL 2000mVpp,PLL2的OSC_MUX都只选VCO,但输出的现象是指示灯显示PLL1和PLL2都已经锁定,但只有clkout6有1500mVpp的2.4GHz输出,clkout0和clkout2只能看到10mVpp左右的输出,请问原因可能是什么?