Multiple sampling frequencies on one input device

2 次查看（过去 30 天）
Daniel
Daniel 2013-10-29
回答： John Doe 2013-10-29
I am using the latest Matlab version (2013b) and I am wondering if it is possible to create two daq sessions with different channels from the same device and use two different sampling frequencies so I can measure them at the same time?
For example I am using a NIDAQ USB-6009 acquisition system and I would like to do something like this using only the one device:
channels 0,1,2 are part of one session and have a sampling frequency of 1,000 Hz. channel 3 is part of another session and has a sampling frequency of 10,000 Hz.

请先登录，再回答此问题。

回答（1 个）

John Doe
John Doe 2013-10-29
You can use the matlab function "downsample(signal, 10)" or "decimate(signal, 10)" on channels 0-2 which will convert the signal data from fs=10000 to fs=1000 as it's read in. I believe one function (decimate I think) smooths the result and reduces aliasing.
I do not believe the hardware can be altered to run on two different sampling freqs.

类别

在 Help Center 和 File Exchange 中查找有关 Data Acquisition Toolbox Supported Hardware 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by