SC5 Signal Conversion Performance Measurements
67
Summary
The table shown below provides a summary of the harmonic distortion measurements.
Frequency (kHz) Amplitude (V) SINAD (dB) THD+N (dB) (%) THD (dB) (%) SFDR (dBc)
0.1 9 > 93 < -93 (< 0.002 %) < -99 (< 0.0011 %) > 99
0.9 > 89 < -89 (< 0.004 %) < -100 (< 0.001 %) > 101
0.09 > 71 < -71 (< 0.028 %) < -90 (< 0.003 %) > 92
1 9 > 92 < -93 (< 0.0021 %) < -98 (< 0.0012 %) > 102
0.9 > 82 < -82 (< 0.008 %) < -83 (< 0.0065 %) > 85
0.09 > 66 < -65 (< 0.051 %) < -70 (< 0.031 %) > 72
10 9 > 79 < -79 (< 0.011 %) < -80 (< 0.01 %) > 80
0.9 > 70 < -70 (< 0.031 %) < -72 (< 0.023 %) > 74
0.09 > 51 < -51 (< 0.26 %) < -52 (< 0.23 %) > 54
Table 19: SC5 analog outputs harmonic distortion, summary of all measurements.
Crosstalk
Crosstalk between two adjacent output channels is measured with one output connected to a battery-powered
Stanford Research Systems SR560 low-noise differential preamplifier set to gain 1000 and to a National Instruments
4071 PXI digital multimeter operated in digitizer mode for recording the spectrum, while the adjacent output is set to
1 V and 10 V output amplitude. The following settings were used for the measurement:
DMM
Measured output: AO1 Mode of operation: Digitizer, AC Volts
Driven output: AO2 Range: 10 V and 100 mV
Output amplitude: 1V and 10 V Samplig rate: 5 kS/s
Resolution: 18 bit
Frequency Crosstalk amplitude (1 V) Crosstalk amplitude (10 V) FFT resolution
10 Hz < 250 nV/√Hz < 1500 nV/√Hz 25 mHz
100 Hz < 150 nV/√Hz < 800 nV/√Hz 50 mHz
1 kHz < 200 nV/√Hz < 1000 nV/√Hz 50 mHz
10 kHz < 300 nV/√Hz < 2000 nV/√Hz 0.25 Hz
Table 20: Crosstalk signal amplitude of the analog outputs of the SC5 for a signal amplitude of 1 V and 10 V on the output
adjacent to the measured channel.
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