Search the Community

Hello I am working with USRP and GNSS Test Toolkit 3.0 to generate GNSS signals. As I transmit the simulated signal through the USRP, I have difficulty getting anything on my GNSS device(no satellites visible/no location fix). What might be wrong, especially about the generation parameters/configuration? What should be the TX power level? Are there any other aspects that I need to consider? Description of hardware setup: I am using NI USRP-2974 with the default streaming project, where I read the GNSS binary file created using GNSS toolkit 3.0 and transmit the IQs at a rate of 10MS/s (read from the binary file) at a center frequency of 1602 MHz using an omni antenna which is appropriate for the L band. All other USRP TX settings are at default values. I have tried attenuators ranging from -50 dB to -90 dB. My GNSS receiver/test device is a surveying GNSS tablet with a GNSS antenna. Configuration of the GNSS test toolkit: I have used niGLONASS Write Waveform to File (Simple, Automatic Mode).vi from the GNSS toolkit 3.0 with the default values (including the almanac and ephemeris files provided with the toolkit) I will be looking forward to hearing from you. Best regards,

I'm needing two c-series Modules for the CompactDAQ. They are a GPS module and an accelerometer module. I know that S.E.A. sell a GPS c series module, but it is only compatible with cRIO, not cDAQ, obviously with the different interfaces. Does anyone know of any companies that sell GPS and accelerometer modules for the cDAQ? Thanks.