s*l
2 楼
I noticed that. and that's why I suspect that there's only sinusoidal
output signal. In that case, what's the use to talk about all kinds
of signal? The bottom line, sinusoidal signal should be available as
long as it is some sort of signal source, no matter sg, fg. but pulse
generator is a different story. There are such applications that want
really fast pulse signal, say in the picosecond range. The duty cycle
is much smaller than one, meaning the repetition rate is much lower
compared to the
output signal. In that case, what's the use to talk about all kinds
of signal? The bottom line, sinusoidal signal should be available as
long as it is some sort of signal source, no matter sg, fg. but pulse
generator is a different story. There are such applications that want
really fast pulse signal, say in the picosecond range. The duty cycle
is much smaller than one, meaning the repetition rate is much lower
compared to the
f*a
3 楼
两个概念,
信号,可以是 sin,square..., 它有一个频率,比如 1KHz, 100KHz, 1MHz
该信号无线传输之前需要被调制,调制模式可以是AM,FM,FSK,ASK,QPSK....
调制后的"信号"通过载频发射和接收,载频可以是 100MHz, 434MHz,915MHz, 1.2GHz.
接收的载频信号被解调后恢复出原来的波形,sin,square.......
这里说得sin,square....信号需要用Function Generator来获得
你说的RF signal generator,有sin,square信号输入后,通过调制获得
434MHZ的RF信号.
用来测试接收解调系统的话,把 RF signal generator输出接到被测系统的输入,
从系统输出解调后的信号也就是你要的sin,square....
在RF signal generator上有信号输入的BNC接口,从function generator输出口
用同轴线接上就可以了.
当然,如果RF signal generator自带信号发生器,就省事了
(信号周期1MHz,10KHz与
信号,可以是 sin,square..., 它有一个频率,比如 1KHz, 100KHz, 1MHz
该信号无线传输之前需要被调制,调制模式可以是AM,FM,FSK,ASK,QPSK....
调制后的"信号"通过载频发射和接收,载频可以是 100MHz, 434MHz,915MHz, 1.2GHz.
接收的载频信号被解调后恢复出原来的波形,sin,square.......
这里说得sin,square....信号需要用Function Generator来获得
你说的RF signal generator,有sin,square信号输入后,通过调制获得
434MHZ的RF信号.
用来测试接收解调系统的话,把 RF signal generator输出接到被测系统的输入,
从系统输出解调后的信号也就是你要的sin,square....
在RF signal generator上有信号输入的BNC接口,从function generator输出口
用同轴线接上就可以了.
当然,如果RF signal generator自带信号发生器,就省事了
(信号周期1MHz,10KHz与
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