Products > Test Equipment
Measuring power supply ripple with Siglent 1202X-E
MarioBros69:
What I wanted to say is, what's the point of buying a 500 uV/div oscilloscope if I have such a noisy environment?
Anyway, after reading and learning from your answers, I understand that the first thing to do (if that is possible) is to avoid the source of noise.
My intention is to buy a 1104X-E but they sent me a 1202X-E by mistake, I have returned it and in the next few weeks I have to decide which one to buy, so read this forum a lot
By the way, the more I read the forum the more money I want to spend
At my age (55 years old) and my little knowledge of electronics belongs to the era of analog oscilloscopes, I recently decided to return to electronics as a hobby and I am buying some equipment
This week someone close to where I live sells me a KIKUSUI 5060 analogue in good condition for just under 100 euros and since my knowledge of electronics is limited maybe it is enough for a simple hobby
I have many doubts
nctnico:
Skip the old crap unless you want to have a hobby keeping your equipment running.
markus_jlrb:
If you could not effort or use diff probes, I would like to recommend a
battery drive scope like the OWON HDS2xxx devices.
40MHz BW -> HDS2042(S)
70MHz BW -> HDS2072(S)
100MHz BW -> HDS2102(S)
200MHz BW -> HDS2202(S)
The S-models include a build in 20MHz sig. generator (sinus) 5MHz (rectangle) and arbitrary sig. formats.
For a beginner it is more secure as you avoid the GND/shortage problematic while taking your measurements.
Nevertheless it's important to understand how to connect DSO/Scope and DUT in a secure way to avoid a damage
of your device and/or your DUT.
Markus
MarioBros69:
--- Quote from: markus_jlrb on September 03, 2023, 04:53:57 pm ---
If you could not effort or use diff probes, I would like to recommend a
battery drive scope like the OWON HDS2xxx devices.
40MHz BW -> HDS2042(S)
70MHz BW -> HDS2072(S)
100MHz BW -> HDS2102(S)
200MHz BW -> HDS2202(S)
The S-models include a build in 20MHz sig. generator (sinus) 5MHz (rectangle) and arbitrary sig. formats.
For a beginner it is more secure as you avoid the GND/shortage problematic while taking your measurements.
Nevertheless it's important to understand how to connect DSO/Scope and DUT in a secure way to avoid a damage
of your device and/or your DUT.
Markus
--- End quote ---
Thank you very much for the advice, after reading many in this forum my current idea is to buy a 1104X-E but I will also take your advice into account
Do you mean that since the oscilloscope is portable and not connected to 220v, I will no longer have noise when taking the measurement?
Performa01:
--- Quote from: MarioBros69 on September 03, 2023, 05:57:18 pm ---Do you mean that since the oscilloscope is portable and not connected to 220v, I will no longer have noise when taking the measurement?
--- End quote ---
A battery operated scope can measure differential signals (i.e. wihout ground reference) with some griefs when in a pinch, but that does not magically turn the single ended (asymmetric) scope inputs into well blanced differential ones. Consequently, the common mode rejection will be quite bad, especially at higher frequencies.
Sensitive measurements require proper probing techniques, simple as that. Yet a modern DSO can help you with this, even when the signal of interest is drowned in environmental noise. For instance, just to measure the ripple of a linear power supply, you could use AC line triggering and average acquisition mode to get the signal clearly visible and make precise measurements.
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