I have to design a test bench for a device that has more than 1000 outputs. The voltage of these outputs will be about 10mV peak-to-peak, the frequency will be in the range of 100MHz (for the carrier) and between 0Hz to 10kHz for the envelope that I am interested in.
I plan to buy 16 acquisition boards (NI PXIe-6361, X Series Multifunction DAQ (16AI, 24 DIO, 2 AO), 2 MS/s single-channel sampling rate input) to collect the data coming from the device, but I need some advice regarding how to design efficiently the interface between the device and the DAQ.
I planned to use multiplexers to reduce the number of DAQs, because I know those parts are expensive.
Do you know if there are commercial products that can take out the envelope of multiple channels?
If no, I may have to design my own board probably with one mixer and one low-pass filter per channel.
What I would like to know is : what is the most effective way to design a huge number of amplifier/demodulators to get the envelope of 1000 low-voltage signals?