Software-defined radio for RF and extensive software-controlled PLL synthesis have changed the rules of the game. Things like RTL-SDR can be any type of radio you like, and can be used on almost any frequency you like. But not every SDR or PLL system opens the door to configuration for you (the end user).That’s the problem [vgnotepad] Problems encountered when trying to connect Sennheiser wireless microphones to certain receivers. They did not use the same frequency, even though the transmitter was programmable. The solution is obvious- Crack the launcher!
This article is only part of a few parts. If you read it to the end, you will learn a lot about the internals of the device and how to hack it. Fortunately, this device uses a PIC processor, so obtaining software is not a big problem.
The PIC uses I2C to communicate with the configuration EEPROM, so a little snooping on the bus can be of great help. Something dumped leads to finding the frequency setting. Up to the sixth part of the post, everything is fine.
If you need to get started with PLL, please start here. Or use Arduino to build your own.