# Source generator for Satellite Tuner input

I need to design a source generator for a TV factory. They want to automatize the functional tests by applying a test module to the TV's at the end of the production line. All the peripherals of the TV (USB HDMI Satellite Terrestrial etc) will be plugged into the test module and will be monitored if the TV operates fully functional.

There will be 500 TV's on the line tested simultaneously so the module has to be cost effective. So I will use Raspberry pi module for USB and HDMI tests but for satellite and terrestrial I am having trouble to find a solution.

I was thinking of using this type of solution for the satellite and terrestrial source input:

Can I use this DAC&Modulator structure to steam a video over satellite cable? For example, I want to send the video in the settings below:

If I convert a video to .ts (transport stream) format and directly feed into the DAC's input will I be able to see the video on TV? Lets say I will send the video data in 30MB/s into the DAC's input (to satisfy 30MS/s symbol rate) and set the Local Oscillator frequency to 1450-30=1420 MHz I think I will be satisfying the RF requirements. However, I still don't know how to set coding rate to 9/10 and to set constellation to 8PSK. I need help from experienced engineers in satellite commnication.

• Sounds like this is a job for a consultant that knows about this technology. You can choose to either team up with someone that can actually help you do this, do a lot of research and reading till you can do this yourself or just pass this project onto someone else. This question is way too broad for the format of this site and as such I am voting to close this for that reason. – Michael Karas Mar 17 at 10:41

You can then use commercially or freely available tools to generate the baseband signal you want to modulate up to the carrier frequency. Disclaimer: I'm affiliated with the GNU Radio Free Software project, with comes with gr-dtv, a module containing DVB-T, -T2, -S and -S2 transceiver infrastructure. I'm also affiliated with Ettus, which produce the USRP line of software defined radio devices. But I'd honestly recommend you go for GNU Radio (maybe try my live SDR USB drive image) and an Ettus B200 for your signal generation needs.