17
六,常见问题问答
FAQ
问:如何判断机器是好的
Q : how can I know the machine is good.
答:将后面
10M
输出,接到
CH1
,频率应该显示在
10M
,表示机器良好
A : connect front panel 10M to rear panel CH1,LCD will display 10M means counter
is good.
问:测量低频频率跳动,测量不准确,怎么办
Q:test low frequecny ,freqnency is not accuary,how to do
答:打开低通滤波器
A: open LPF
问:可以用示波器表笔做探头吗?
Q:can used oscillator pen to test
答:不建议,主要是探头
X1
档频率范围比较窄,
X10
阻抗又比较高,很容易造
成阻抗不匹配,造成信号衰减,无法测量
A:not suggest,because X1 frequency is limit ,X10 is HIGH impdence,it is easy to
signal attenuator ,can not test
问
;
后面的
USB
口有什么用
Q:what is the application of the usb port.
答:通信用,可以用电脑控制频率计
.
A:communication ,control counter with PC.