I have some curiosity about USRP up/downconversion
If I have a rectangular pulse train
and I want to send it with carrier freq. 2.4G
So I set frequency in USRP block with freq. 2.4G
Then, my rectangular pulse train is moved to 2.4G band in frequency
In other words, USRP block automatically moves baseband signal to
frequency? And is it called ‘upconversion’ ?
Or, before the USRP block, do I have to multiply a sinusoidal signal
freq. 2.4G ?
In advance, If I have a signal with two main component with freq. 100M
and USRP carrier freq. is 2.4G,
Then does this performs FM with freq. 2.5G and 2.6G?
I have some difficulties about understanding modulation and carrier