Hello,
Please can you tell why the attached offline LED driver test setup makes the LED driver not work properly whenever the coaxial probe is connected to the scope. As soon as we disconnect the BNC of the coaxial probe from the scope, the LED driver works properly again.
Do you know what is happening?
The strange thing is that this set-up was working fine a few weeks ago and giving nice scope shots of the current waveform via the sense resistor.
The scope is a Tenma 72-8705A….
https://uk.farnell.com/tenma/72-8705/oscilloscope-2ch-50mhz-1gsps/dp/1836059
Please can you tell why the attached offline LED driver test setup makes the LED driver not work properly whenever the coaxial probe is connected to the scope. As soon as we disconnect the BNC of the coaxial probe from the scope, the LED driver works properly again.
Do you know what is happening?
The strange thing is that this set-up was working fine a few weeks ago and giving nice scope shots of the current waveform via the sense resistor.
The scope is a Tenma 72-8705A….
https://uk.farnell.com/tenma/72-8705/oscilloscope-2ch-50mhz-1gsps/dp/1836059