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NI 5421 Specifications 8 ni.com
Spectral Characteristics (Continued)
Spurious-Free
Dynamic
Range
(SFDR) with
Harmonics
Path Amplitude
–1 dBFS.
Measured from
DC to 50 MHz.
Also called
harmonic
distortion.
SFDR with
harmonics at low
amplitudes is
limited by a
–148 dBm/Hz
noise floor.
All values are
typical and
include aliased
harmonics.
Direct
Low-Gain
Amplifier
High-Gain
Amplifier
1 MHz –76 dBc –71 dBc –58 dBc
10 MHz –68 dBc –64 dBc –47 dBc
20 MHz –60 dBc –57 dBc –42 dBc
30 MHz –73 dBc –73 dBc –74 dBc
40 MHz –76 dBc –73 dBc –74 dBc
43 MHz –78 dBc –75 dBc –59 dBc
Spurious-Free
Dynamic
Range
(SFDR)
without
Harmonics
Path Amplitude
–1 dBFS.
Measured from
DC to 50 MHz.
SFDR without
harmonics at low
amplitudes is
limited by a
–148 dBm/Hz
noise floor.
All values are
typical and
include aliased
harmonics.
Direct
Low-Gain
Amplifier
High-Gain
Amplifier
1 MHz –88 dBFS –91 dBFS –91 dBFS
10 MHz –87 dBFS –89 dBFS –91 dBFS
20 MHz –80 dBFS –89 dBFS –89 dBFS
30 MHz –73 dBFS –73 dBFS –74 dBFS
40 MHz –76 dBFS –73 dBFS –74 dBFS
43 MHz –78 dBFS –75 dBFS –60 dBFS
Table 1. (Continued)
Specification Value Comments