NTA is currently developing a small, portable RF data recorder that combines our experience with data recorders and software-defined radio chipsets. One major obstacle in this project is dealing with the volume of data generated. The unit monitors and processes multiple channels of 12-bit 60 MSPS data, which accumulates quickly. To deal with this issue we utilize a proprietary technique that analyzes the peak-hold data of an FFT and triggers when to store the raw RF data. This technique maximizes efficient use of the SD cards. We have also demonstrated the ability to demodulate some simple RF signals, such as FSK modulation, with FPGA logic.
Portable RF Data Recorders
