1. Connect from your computer via RS-232 port with SBI-5450

2. Start the program "SDL-Downloader.exe"

3. Set port setup of "SDL-Downloader.exe"(speed : 115200, port : serial port number of your PC)

4. Execute 'SDL-Downloader.exe / TOP10237003.S1AV11D'

5. Power-off and power-on

6. STB will download that SW and restart automatically after finishing download.