National Instruments NI USB-9234 User Manual page 18

Measurement Conditions
Calibrated max (–40 to 70 °C)
Calibrated typ (25 °C ±5 °C)
Uncalibrated max (–40 to 70 °C)
Uncalibrated typ (25 °C ±5 °C)
*
Range = 5.1 V
pk
1
Refer to the NI USB-9234 Circuitry
NI USB-9234 User Guide and Specifications
Overvoltage protection (with respect to chassis ground)
For a signal source connected
to AI+ and AI– ................................±30 V
For a low-impedance source
connected to AI+ and AI– ...............–6 to 30 V
Input delay ..............................................3.2 ms + 38.4 f
1
Accuracy
Gain drift
Typical.............................................0.14 mdB/°C (16 ppm/°C)
Maximum ........................................0.45 mdB/°C (52 ppm/°C)
Offset drift
Typical.............................................19.2 mV/°C
Maximum ........................................118 mV/°C
Channel-to-channel matching
Gain
Typical......................................0.01 dB
Maximum .................................0.04 dB
Phase ( f in kHz) ............................f
in
Passband
Frequency ........................................0.45 · f
Flatness (f = 51.2 kS/s) ...................±40 mdB
s
section for information regarding grounded signal sources and measurement accuracy.
Percent of Reading
(Gain Error)
0.34%,
±0.03 dB
0.05%,
±0.005 dB
1.9%,
±0.16 dB
0.48%,
±0.04 dB
· 0.045° + 0.04 max
in
(pk-to-pk max)
18
s
Percent of Range
(Offset Error)
±0.14%,
7.1 mV
±0.006%,
0.3 mV
±0.27%,
13.9 mV
±0.04%,
2.3 mV
s
*
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