# Data measuring interface

I have an hardware related question.

I want to create a measurement set-up so that I can record data for DSP analysis. When searching around I see I have a few different options. The ones I have found are:

• Data acquisition box / interface
• Logic analyzer
• Scope
• Soundcard (have specific input type (XLR/ TRS-Jack) )

From DSP perspective what are the differences between these types of measuring devices? Specially the difference between a DAQ and a logic analyser?

As Questioned in the comments: what are the parameters i want to measure. Here is the list for now(witch can change later on):

• Torque
• Acceleration(vibration)
• (velocity)
• Force
• if possible Ammeter
• different switches for safety sensors(just low and high over time)
• some pulse generators

I'm not sure what the bandwidth is of every signal. But i assume that the maximum bandwidth is from the acceleration sensors. I assume that the bandwidth is f_max = 10kHz so f_sampling = 25 or 30 kHz.

• so, what data? Without that info, you can't get a precise answer. Signals/data are everywhere, and it kind of makes a difference whether you're watching the changes in temperature on noon over the year, or the number of photons hitting a sensor within 10 femtoseconds.... Sep 8 '17 at 20:33
• edit my question Sep 9 '17 at 6:15
• So, what are the speeds with which these things can change? Sep 9 '17 at 7:36
• don't exactly know yet... let's say for vibration stuff f_max = 10kHz so f_sampling = 25 or 30 kHz but not sure if that is relevant for what the differences are. It looks for me more within a chosen recorder/ device what type do i need (#channels, sample frequency etc). If it is important make it part of the answer... Sep 9 '17 at 10:53
• Well, that's very important info! include it in your question!!! Better give too much than too little info. So yes, if in doubt, everything is relevant. Sep 9 '17 at 10:54