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© National Instruments Corporation 9 NI 5421 Specifications
Spectral Characteristics (Continued)
0 ºC to 40 ºC
Total
Harmonic
Distortion
(THD)
Path Amplitude
–1 dBFS.
Includes the 2
nd
through the 6
th
harmonic.
Direct
Low-Gain
Amplifier
High-Gain
Amplifier
20 kHz –77 dBc (typical)
–77 dBc
(typical)
–77 dBc (typical)
1 MHz –75 dBc (typical)
–70 dBc
(typical)
–62 dBc (typical)
5 MHz –68 dBc –68 dBc –55 dBc
10 MHz –65 dBc –61 dBc –46 dBc
20 MHz –55 dBc –53 dBc —
30 MHz –50 dBc –48 dBc —
40 MHz –48 dBc –46 dBc —
43 MHz –47 dBc –45 dBc —
0 ºC to 55 ºC
Total
Harmonic
Distortion
(THD)
Path Amplitude
–1 dBFS.
Includes the 2
nd
through the 6
th
harmonic.
Direct
Low-Gain
Amplifier
High-Gain
Amplifier
20 kHz –76 dBc (typical)
–76 dBc
(typical)
–76 dBc (typical)
1 MHz –74 dBc (typical)
–69 dBc
(typical)
–61 dBc (typical)
5 MHz –67 dBc –67 dBc –54 dBc
10 MHz –63 dBc –60 dBc –45 dBc
20 MHz –54 dBc –52 dBc —
30 MHz –48 dBc –46 dBc —
40 MHz –46 dBc –41 dBc —
43 MHz –45 dBc –41 dBc —
Table 1. (Continued)
Specification Value Comments