Overview
The USRP 2945 and 2955 (TwinRX) have four RX channels with 80MHz bandwidth (100MS/s). Streaming all the channels with full bandwidth will give an overall data throughput of 1.6 GB/s: 4 channels x 2 channels (IQ) x 2 Bytes per samples x 100 MS/s = 1.6 GB/s. The MXIe connection on the USRP can only handle 800 MB/s so it cannot stream the full bandwidth. The two SFP+ ports on the USRP give the possibility to stream the full bandwidth using two x1 Aurora streams (10.3125 Gbps per lane)
Description
Created an example streaming the full bandwidth of a 2945/2955 to a 6592R using the two SFP+ ports on the USRP connected to two ports on a 6592R. The example can send simulated data or the real data coming from the RX channels
Features
- Stream all the 4 channels with full bandwidth (100MS/s) and store the data directly in a TDMS File on a RAID-0 System.
- Select a channel while the acquisition is running to preview its Power Spectral Density (PSD).
- Process the compressed data in the Raw-TDMS File into separate TDMS Files per Channel to have the ability to post process this acquired data.
Hardware and Software Requirements
Software:
- LabVIEW 2016 32-bit
- LabVIEW FPGA
- NI USRP 17.0
- NI HSDIO 17.0
- NI LabVIEW Instrument Design Libraries for High Speed Serial Instruments 16.1
Hardware:
- PXIe-6592R
- USRP-2945
- PXIe chassis, controller and MXI card. The project was tested using the following setup
- PXIe-1095
- PXIe-8880
- PXIe-8374
