National Instruments NI 447 Series User Manual page 56

Appendix A Specifications
Onboard Calibration Reference
Signal Conditioning
1
Measured with full-scale (±10 V) input.
NI 447X User Manual
0 dBFS input....................................<−90 dB
–20 dBFS input................................<–100 dB
–60 dBFS input................................<–60 dB
IMD ........................................................<–100 dB
1
Crosstalk (channel separation), f
Between channels 0 and 1, 2 and 3, 4 and 5, or 6 and 7
Shorted input ............................<–90 dB
1 kΩ load ..................................<–80 dB
Other channel combinations
Shorted input ............................<–100 dB
1 kΩ load ..................................<–90 dB
Phase linearity.........................................<±0.5°
Interchannel phase mismatch..................<f
Interchannel gain mismatch....................±0.1dB
DC level ..................................................5.000 V ±2.5 mV
Temperature coefficient..........................±5 ppm/°C max
Long-term stability .................................±20 ppm/
Constant current source (software-enabled)
Current.............................................4 mA, ±5%
Compliance......................................24 V
Output impedance............................>250 kΩ at 1 kHz
Current noise ...................................<500 pA/
(CCIF 14 kHz + 15 kHz)
= 0 to 51.2 kHz
in
in
A-6
(in kHz) × 0.018° + 0.082°
1,000 h
Hz
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