9233 Sampling rates

[Matt_A]

Hello Rafo,

As noted in the NI SCXI-1530/1531 User Manual here, the NI SCXI-1531 has programmable four-pole Bessel filter settings of 2.5, 5, 10 or 20 kHz. The user manual also states that the NI SCXI-1531 is AC coupled, which means that it cannot take DC measurements. However, the user manual does not contain any additional details regarding the low frequency attenuation in the NI SCXI-1531. I am looking into this low frequency performance and will post back when I have more details.

[Matt_A]

Hello Rafo,

After looking through the SCXI-1530/1531 User Manual a little further, I found the description of the AC Coupling on page A-3. If you examine the specification called "Filter type" you will see that both the lowpass bessel filter and highpass AC coupling are shown. I have copied the details below:

"Filter type ...............................................    4-pole Bessel lowpass
                                                                    2-pole 0.2 Hz RC highpass"

So, in this case, the AC coupling is implemented using a 2-pole 0.2 Hz highpass filter.