User guide

12 Introduction
Spectral Characteristics – PXI-9846
Figure 1-8: PXI-9846 FFT with ±0.2 V Input Range
Specification Input Range
±1 V ±0.2 V
Signal to Noise and Distortion (SINAD), typical 76.06 dBc 71.97 dBc
Signal-to-Noise Ratio (SNR), typical 76.17 dBc 71.98 dBc
Total Harmonic Distortion (THD), typical -90.65 dBc -95.78 dBc
Spurious Free Dynamic Range (SFDR), typical 91.62 dBc 96.15 dBc
Effective Number of Bit (ENOB), typical 12.34-Bit 11.66-Bit
Test Conditions: Input signal frequency is 0.998 MHz. Digitizer sampling
rate at 40 MHz with 50 Ω input impedance. Calculated with 64 K-point data.
Note that these dynamic parameters may vary from one unit to another, with
input frequency and with the full scale input range selected.
Table 1-7: Spectral Characteristics – PCI/PXI-9846
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
x 10
7
-1 20
-1 00
-80
-60
-40
-20
0
Frequency (Hz)
Magnitude (dB)
PXI -9846, +/-0.2V, S-Rate = 40MS/s, I nput Signal = 0.998 MHz @ - 0 .97 58 dBFs