Our office will be closed from December 23, 2020 to January 3, 2021. Orders placed during this time will be processed starting on January 4, 2021.

Phase noise measurements with the Koheron ALPHA250


We released a new FPGA design for phase noise measurements.

Using a Koheron ALPHA250, we compared the phase noise of 40 MHz signals from 3 different noise sources: a Red Pitaya STEMLab 125-14, another Koheron ALPHA250, and a 120 MHz signal generator (Keysight 33622A):

Phase noise comparison

The higher phase noise of the Red Pitaya can be explained by the fact that the Red Pitaya DAC is clocked from a phase-locked loop inside the FPGA, instead of an external PLL.

The source code is available on GitHub for the ALPHA250 and the Red Pitaya.

Also tagged FPGA

[email protected]