Quote Originally Posted by chrism View Post
Just check the voltage at each Murata poition as you need a voltage differential through the regulator. The 5v one should be fine but just check the 12v one. If you only have 12v to it and 12v out it may cause the noise you are hearing.

Regards
Hi chrism, you mean during caiman powered up and fed with signal to use the voltmeter to measure voltages between GND and Vin and then between GND and Vout, right? I'll do that this afternoon, thank you!