According to Wikipedia a set-top box (STB) is:
an information appliance device that generally contains a tuner and connects to a television set and an external source of signal, turning the source signal into content in a form that can then be displayed on the television screen or other display device. Set-top boxes can also enhance source signal quality. They are used in cable television and satellite television systems, as well as other uses.
Apart from STB-Tester, is there any other open-source or freeware STB-testing tool available?
I have searched a lot on google but haven't found anything other than STB-Tester. I earlier posted this in Stack Overflow, but couldn't get any answer, so hoping posting here may get some replies.