National-instruments 24-Bit Half/Full-Bridge Analog Input Module NI 923 Manuel d'utilisateur télécharger pdf (Page 25)

Rejection at oversample rate

= 10 kS/s.................................. 60 dB @ 640 kHz

= 50 kS/s.................................. 90 dB @ 3.2 MHz

Common-mode voltage,

all signals to earth ground................. ±60 VDC

CMRR

Relative to earth ground

= 0 to 60 Hz)......................... 140 dB

Relative to EX–

= 0 to 1 kHz)......................... 85 dB

SFDR (1 kHz, –60 dBFS)................. 106 dB

Total Harmonic Distortion (THD)

1 kHz, –20 dBFS ........................ 100 dB

8 kHz, –20 dBFS ........................ 90 dB

Rejection by analog prefilter of signal frequencies at oversample rate.

Measured with a balanced cable. Shielded cables that are not twisted-pair may be

significantly unbalanced. To improve the balance of shielded, twisted-pair cables,

NI recommends twisting together the AI+/AI

– pair, the RS+/RS– pair, and the

EX+/EX

– pair.

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National-instruments 24-Bit Half/Full-Bridge Analog Input Module NI 923 Manuel d'utilisateur Page 25