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MAX13487E 发送状态下A、B间电平不符合正常逻辑

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The user encountered an issue with the MAX13487E where the A-B signal does not show a high level, only a high spike, but data can still be read with a 485 tool. The final answer suggests using a differential probe for measuring A-B, which should resolve the issue.
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你好,使用贵司MAX13487E,原理图如图 ,切换到对外发送信号,示波器沟取信号如图,CH1:A-B,CH2:A-GND,CH3:B-GND

其中A对B信号,无法呈现高电平,仅出现高尖峰,但是用485工具能正常读取到数据,看了群组里类似的提问与回答,还是有疑问,如果这是属于正常现象,希望给个官方详细解释。

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