“当你接触到天线上的那个信号衰减点的时候，就改变了天线的阻抗属性，”Banos说。

“When you physically touch the antenna in that spot, you’re changing the impedance characteristics of the antenna, ” said Banos.

youdao

“当你接触到天线上的那个信号衰减点的时候，就改变了天线的阻抗属性，”Banos说。

"When you physically touch the antenna in that spot, you're changing the impedance characteristics of the antenna," said Banos.

youdao

X1探头﹕没有衰减﹐输入阻抗跟示波器输入阻抗一样(通常是1兆欧)。由于对测试电路有很大的负载影响﹐所以很少使用这种探头。

X1 probe: no attenuation, input impedance follow that of scope input impedance (usually 1 Mohm). This type of probe is seldom used because of heavy loading effect on circuit under test.

youdao