在下面的离子里，进入PTCOIL中的能流在OFF和ON之.间来回变化。第一次主描时能流是OFF，第二次扫描时能流是ON,等等。每次进入PTCOIL的能流从OFF变为ON,Xsition的值转为ON,因此第一次扫描时，PTCOIL把Xsition转为OFF,第二次扫描时，PTCOIL把Xsition转为ON，第三次又转为OFF，如此这样。注意PTCOIL的动作不受第四梯级存在的影响，也写进Xsition。当第四梯级删除时，PTCOIL动作不变。
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Himmelstein Transducer Amplifier 6-201 #32997
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