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Hello everyone, I have problem with my digital oscilloscope, the signal on testing like noise, how to reduce them?
My scope is siglent sds1102dl, bandwidth 100mhz, may be I need 20mhz, how to set bandwidth? I attachment image noise
I try measure all sinewave is same result, The scope condition if testing signal calibration on 1khz is same, the signal is not smooth,
The fact that you see a distorted sinusoid does not refer to noise, but probably a strong interference with the signal either from the circuitry of the board or from a long wire on the ground contact probe, which you as an antenna catch this interference.
I try measure all sinewave is same result, The scope condition if testing signal calibration on 1khz is same, the signal is not smooth, I zoom it's, like any noise, why, my scope is not normally?
Looking at the photo showing the probe connection on the board, there are three coils besides the probe tip, and with the ground lead "miles" away from the scoping point, it easily picks up the signals the coils may emit. Looking at the signal on the scope it shows switching spikes. So are these coils part of a switching supply?
It's normal
Allband Bitx Radio Kit without Power Amplifier (Just Exciter, need additional linear amplifiers to be able to transmit)
Nevertheless, I still wonder how an intact scope in AC coupling mode can produce such an offset, as tautech mentioned.
The fact the trigger level is above the signal could maybe mean this trace was captured with different settings than shown?
Quote from: Kean on October 22, 2024, 04:14:30 pmThe fact the trigger level is above the signal could maybe mean this trace was captured with different settings than shown?Is it also likely that the user himself shifted the signal higher or lower after the capture?
But relative to the “1” arrow (not the vertical center of the screen)?My Hantek keeps the arrow in the center of the wave form, even if I move it vertically after the capture.
The picture of the screen was taken at an angle to the display, so the proportions and size may be visually distorted. The photo shows that the test signal magnitude is approximately 3Vpp. The level of the arrow is labeled CH1/1.44V, which corresponds roughly to the middle of the signal.
Quote from: indman on October 22, 2024, 04:37:02 pmThe picture of the screen was taken at an angle to the display, so the proportions and size may be visually distorted. The photo shows that the test signal magnitude is approximately 3Vpp. The level of the arrow is labeled CH1/1.44V, which corresponds roughly to the middle of the signal.No, it's all on one level. This is not an optical illusion, you have the graticule to compare.You can clearly see that there is about 1V above the arrow and about 2V below the arrow.I have never seen that in AC coupling.