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It's All About The Data: How To Choose The Right Data Acquisition Filters

by Roland Stanley

When you're working with data acquisition, you can't afford to deal with signal interference, especially if it's causing inconsistencies in the data you're collecting. The last thing you need is to find out that your data has been flawed from the point of collection. One way to work around signal interference and to ensure accurate data acquisition is to install signal filters. However, before you start installing filters, you need to make sure that you're choosing the right ones for your needs. Here are some tips that will help you avoid errors with your filters.

Choose the Filter Type

When it comes to choosing filters for your data acquisition programs, the first thing you need to do is choose the right speed. Using the wrong filters for your programs will lead to faulty data collection. Here's how to choose the right filter type.

High-Pass

If you're going to be working with chemical and biological signals, you're going to need a high-pass filter. High-pass filters are effective in removing the drift that can occur when working with this type of signal.

Low-Pass

When you're working with lower-frequency signals, you're going to need a data acquisition low-pass filter. The low-pass filter will remove all the high-frequency chatter that can interfere with your data acquisition.

Anti-Aliasing

If you're going to be recording waveforms during data acquisition, you're going to need an anti-aliasing filter. This type of filter allows you to take samples of different types of readings while connecting the pieces in an understandable collection of information. If you're not using anti-aliasing filters during this type of data collection, you won't get an accurate interpretation of the information.

Choose the Right Hardware for the Filter Speed

Once you've chosen the right type of filter, you'll need to consider the actual filter speed. Whenever you filter the data you're collecting, the process is going to slow down. This is particularly true if you're not using the right computer hardware. Before you start using your filters during data acquisition, make sure you have the right hardware for the process.

Choose the Post-Collection Capabilities

When you're collecting data, you want to make sure that you can analyze the data once it's collected. To do that, you'll need to ensure that your filters provide for analysis post-collection. Post-collection capabilities will allow you to analyze the data via computer programs.

Don't take chances with faulty data. Use the tips provided here to choose the right filters for your data acquisition needs.

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