There is a data acquisition board recording analog signals from 10 channels with multiplexing. If one wants to sample each channel with for example 2000Hz and the number channels is 5 should the sampling frequency be set to 5x2000=10000 for the board? I have a confusion with the skew and sampling. here is the device specs I'm talking about: http://www.mccdaq.com/usb-data-acquisition/USB-1616HS-BNC.aspx
If you want to capture a sinewave of 2kHz then sample as fast as you are able and at the very least you'll need to sample at 5kHz (to avoid unwielding brick-wall filtering on the front end of your ADC).
If you don't sample at a high enough rate you'll get aliasing so, try and sample as fast as you can - that's one channel. Aliasing: -
For ten channels feeding the ADC via a multiplexer then you need to sample ten times as fast as you were for one channel.