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
相关阅读
what kind of computer aided electronic circuit design software was used in the years around 1994?smart grid是属于EE系的么?半导体公司面试都问什么问题呀?怎样婉拒 老板的反套?华为国内16级的待遇是什么情况?[学术问题求指教] Hot Carrier Injection on MOSFET相关免费送酒店入住 25000 SPG Points Bonus 赶快申请SPG 信用卡Amex 开卡送1000刀 Gold Premier Card Match 75K points bonusAmex 开卡送1000刀 Gold Premier Card Match 75K points bonus转行ECE,真心求助请教bipolar信号的读取翻墙问:国内测控博二,来美国读啥?请问,有什么办法读电子秤LCD上的数据么?投ieee trans.的journal前,是不是不要先发conference的好啊?请教一个问题哪能downlodad gdsii and oasis format? (转载)bay area backend layout place&route opening大家帮我看看该选择那条路关于杂志的overlength charge免费送酒店入住 25000 SPG Points Bonus 赶快申请SPG 信用卡