All Questions
9
questions
1
vote
1
answer
300
views
SMPS Testing: Differential Probes or Common lead and best Grounding practice
I'm testing a Switch Mode Power Supply that is not outputting the required voltage. It's only two prong, hot and neutral, and I wanted to get clarification on the best way to approach measuring the ...
- 73
0
votes
2
answers
138
views
How to make sense of the signal trace of differential signal
I am trying to understand following signal trace picture that is shown on the wiki page of 1553 Bus. The Bus has balanced differential pair wires.
As the 1553 bus has differential signals on the ...
- 1,479
12
votes
2
answers
2k
views
Is it acceptable to use decoupling capacitor ground pad as ground for oscilloscope probe?
If one were to probe with an oscilloscope using the short ground spring clip attachment, and use the ground pad of a decoupling capacitor as the ground, would the measurement be thrown off at all by ...
- 543
5
votes
2
answers
671
views
Criticism of my differential pH probe design
I finished and tested with buffers this little differential pH probe on a perfboard, it works, 3 points calibration is linear. The ground electrode is a stainless steel rod wired to the GND of the ...
- 115
5
votes
3
answers
7k
views
Why am I getting a half-wave rectified output when i am using a full-wave rectifier?
I have recently gotten back into electronics and have access to a lab with a signal generator and oscilloscope. I have been trying to teach myself how to use this equipment by building small and ...
- 51
5
votes
1
answer
3k
views
Using Oscilloscope So That Nothing Blows Up
I want to see the input current waveform of an LED T8 18W. An EM ballast is purposely placed in series with the lamp. I don't have a power analyzer. What's available is a GDS-2102 oscilloscope. So I ...
3
votes
1
answer
9k
views
Using oscilloscope to measure voltage across a resistor
I have a board which is powered by a 5V PSU. I needed to measure the current flowing into the processor for computing power. Since there was no resistor that I could find in the path from the supply ...
- 31
1
vote
2
answers
699
views
Spark at the Probe's ground lead
In my set up I have a scope (high end Agilent scope), a PC with a USB port and Device Under Test. The DUT is powered from the USB port of the PC. PC and Scope is connected to the same power strip.
...
- 243
9
votes
1
answer
2k
views
Potential problems if I only ground one probe of my oscilloscope?
I have found that when I'm probing a circuit using more than one oscilloscope probe, clipping the ground of one of the probes to the board seems sufficient to give me stable readings from all of the ...
- 2,699