In Spark plugin_sdk 1.02, one tuner application is added which shows developer how to control tuner and demodulator device.
This is applicable on GM Triplex product which has 3 tuners in maximum.

Plug-in SDK provides the environment for developing plug-in on SPARK platform, including the GUI system and variety of API functions.
Using these, you can develop applications based on Linux DVB API, internet TV, and applications based on Linux standard devices.
This file focuses on how to use the plug-in SDK to develop plug-in applications, introduces the description of the SDK tree, the program development and operation, the GUI system, the API functions, the interaction between SPARK STB and plug-in etc.