NI 9242 User Manual and Specifications
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© National Instruments
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37
Alias-Free Bandwidth
Any signal that appears in the alias-free bandwidth of the NI 9242
is not an aliased artifact of signals at a higher frequency. The
alias-free bandwidth is defined by the ability of the filter to reject
frequencies above the stopband frequency, and it is equal to the
data rate minus the stopband frequency.
Understanding NI 9242 Data Rates
The frequency of a master timebase (
f
M
) controls the data rate (
f
s
) of
the NI 9242. The NI 9242 includes an internal master timebase with
a frequency of 12.8 MHz, but the module also can accept an
external master timebase or export its own master timebase. To
synchronize the data rate of an NI 9242 with other modules that use
master timebases to control sampling, all of the modules must share
a single master timebase source. Refer to the software help for
information about configuring the master timebase source for the
NI 9242. Visit
ni.com/info
and enter
c
s
erie
s
doc
for
information about C Series documentation.