snaulty,
Not having any plateau indicates the wrong hex file, the wrong parameters for the XLoader, or the Si5351 chip failed.
The only way to check the Si5351 chip is with a frequency counter, an oscilloscope, or possibly with another receiver.? You need some way to verify that the chip is generating the clock signals.? Do you have access to one of these devices?
Please post a screenshot of the XLoader screen just before you start the download.? That might tell us something.
73
Evan
AC9TU
