29 Jan
2014
29 Jan
'14
12:12 p.m.
Can someone clarify what the frequency range is in
Direct sampling
mode.
In direct sampling mode you can "tune" by setting the IF between 0 and
30MHz.
So can the dongle in "direct sampling mode"
(with appropriate antenna
connection) receive > 14.4 Mhz (Nyquist) ?
Yes, and it has nothing to do with Nyquist because the sample rate you
receive is only 2MHz or so as per normal. Direct sampling mode does not
capture a wider band than normal, it just uses a different method to
tune the receiver. So the oscillator frequency is irrelevant, and
Nyquist doesn't come into it any differently with direct sampling than
with normal sampling.
Cheers,
Adam.