BandPass Signal Vs PassBand Signal Am reading Rick Lyons - Understanding DSP book about Sampling. I have few doubts related to this chapter.


what is the difference between Bandpass Signal and a Passband Signal ?
Can somebody give an example for a Bandpass system which produces Bandpass signal as output !
When it comes to Baseband Sampling ( Low pass Sampling ) sampling theorem states that " Fs > twice the Highest frequency Component" and for Bandpass Sampling, sampling theorem says Fs > twice the Bandwidth of the signal. why two different sampling statements for the same signal of B hertz.


I understand in Bandpass sampling if I sample at the rate of twice the highest frequency component, then it'll be oversampling.
A PassBand is the Band that can be passed through a BandPass filter, or for that matter, any filter. In other words, the filter is a Bandpass, what signal passes through is a Passband.
The classic is a high pass and low pass together. For instance, a capacitor, inductor, and resistor in series is an example of a bandpass filter. Digitally, you combine a high pass and a low pass filter together. 
Essentially, if you are limited to a small region, you can infer what frequency you are limited to. The classic example is Nf->2*Nf. The frequencies reported at 0 is 2*Nf, the frequency reported at Nf is actually NF, and continue the pattern for the rest. This only works when you are guaranteed to only have frequencies in the particular band.