The GP-Simulator application calculates IQ data in real-time and streams it through USB to the connected SDR USRP B210. This SDR has a small data buffer. When the buffer runs out of data and new data has not yet arrived, the SDR generates an error: -1074118645.
For this application, it's crucial to ensure continuous data transmission; otherwise, the simulated time will be inaccurate. Since the Windows operating system is not a real-time operating system, the following issues can cause this error:
- You have connected the USRP to a USB 2.0 instead of 3.0, and the bus lacks the speed to transmit data in real-time.
- Running multiple applications, antivirus software, and firewalls can load the CPU, hindering the GP-Simulator application's real-time operation. It's recommended to close all unnecessary background processes while working with the application.
- The Google Chrome browser often contributes to this error. Although the reason is unclear, the general recommendation is not to use the browser while operating the application.
