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How to reduce noise on digital oscilloscope?

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sonielkraf:

--- Quote from: Kean on October 22, 2024, 12:50:32 pm ---I agree regarding the probing of the PCB being a potential problem.  The probe is close to potentially radiating components, and has a very long ground lead that will pick up noise.

The PCB that the OP is probing appears to be this Indonesian transceiver kit: https://products.ajetronic.com/2024/06/kit-radio-bitx-allband-tanpa-power.html

--- Quote ---Allband Bitx Radio Kit without Power Amplifier (Just Exciter, need additional linear amplifiers to be able to transmit)
--- End quote ---

A video showing it (Indonesian):

Found via text labels of "ye3cif.com" and "AJE-101".  I didn't find a schematic for this, but there are schematics of other PCBs on an Indonesian amateur radio site ye3cif.com

--- End quote ---
yeah, its hf transceiver, owwh maybe noise is produce by interference on circuit?
or the ground probe is very near?

Kean:

--- Quote from: sonielkraf on October 23, 2024, 05:00:39 pm ---yeah, its hf transceiver, owwh maybe noise is produce by interference on circuit?
or the ground probe is very near?

--- End quote ---

Clip the probe tip to the probes ground lead to make a loop and place that near (but not connected to) the transceiver circuitry.
Look at what you see on the scope, and maybe post a screenshot or photo.

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