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Onboard Calibration Reference
Analog Output
© National Instruments Corporation
Phase linearity ........................................ ±1°, Gain
Interchannel phase.................................. ±1°, Gain
Interchannel gain mismatch ................... ±0.1dB, for all gains
Signal delay............................................ 42 sample periods, any sample
DC level ................................................. 5.000 V ±2.5 mV
Temperature coefficient ......................... ±5 ppm/° C max
Long-term stability................................. ±15 ppm/
PCI-4451 only
Channel Characteristics
Number of channels ............................... 2 simultaneously updated
Output configuration .............................. balanced differential
Resolution .............................................. 16 bits
Type of DAC.......................................... Delta-sigma, 64-times
Sample rates ........................................... 1.25 to 51.2 kS/s in increments
Frequency accuracy................................ ±100 ppm
±2°, Gain < 0 dB
±2°, Gain < 0 dB
(same configuration all input
channels)
(same configuration for all input
channels)
rate (time from when signal enters
analog input to when digital data
is available)
oversampling
of 47.684 µS/s
A-5
Appendix A
Specifications
0 dB,
0 dB,
1 000 h
PCI-4451/4452 User Manual
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