[Jim Kelley]

Arny Krueger wrote:


Incidentally, I took a look at "Telecommunications
System Engineering, Third Edition" by Roger L. Freeman
to see what definitions he uses. He cited another
reference, and quoted this as "the Nyquist sampling

theorem",


"If a band-limited signal is sampled at regular
intervals of time at a rate equal to or higher than
twice the highest significant signal frequency, then
the sample contains all the information of the
original signal. The original signal may then be
reconstructed by use of a low-pass filter."


Congrats to Freeman for avoiding making a different statement that avoids
the error made in the previous statement.

Although, unless the original signal is a squarewave, saying "the
sample contains all the information of the original signal" may be
overly optimistic.

jk