问题
问答题 简答题
BT—3型扫频仪在使用过程中常有哪些不正常现象？
答案
参考答案：
（1）BT—3型扫频仪测量电路时，被测电路级数越多，导致被测电路频率特性曲线滞后扫频信号时间越长，使人感到频标不准；
（2）不同扫频仪测量同一电路，可能出现波形不一致。
（3）扫频仪测试双相波形时，容易产生严重不对称失真。
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BT—3型扫频仪在使用过程中常有哪些不正常现象？
参考答案：
（1）BT—3型扫频仪测量电路时，被测电路级数越多，导致被测电路频率特性曲线滞后扫频信号时间越长，使人感到频标不准；
（2）不同扫频仪测量同一电路，可能出现波形不一致。
（3）扫频仪测试双相波形时，容易产生严重不对称失真。
| 根据句意用方框内词的适当形式填空。 | |
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