signal types

• 信号类型

signal types的用法和样例：

例句

1. In some cases, mixed signal types will limit the choice of switch cards.
   在有些情况下，混合的信号类型会限制开关卡的选择。
2. For certain signal types, such as low level or high frequency, the analog backplane should not be used to avoid possible signal degradation.
   对于特定的信号类型，例如低电平或高频率，则不宜使用模拟背板，以避免造成信号劣化。