All Questions
Tagged with measurement oscilloscope
102
questions
2
votes
0
answers
82
views
What are the disadvantages of crocodile (alligator) probes? [closed]
When measuring with an oscilloscope, I use an original high frequency oscilloscope probe and a double side crocodile (alligator) clip and the results are usually very close.
Note: it is called ...
- 69
0
votes
1
answer
49
views
How to Read Unipolar Square Waves on TRMS Multimeter
I'm trying to switch from reading my high-voltage unipolar square wave signal from a benchtop oscilloscope to a handheld multimeter, but I don't understand why my multimeter is giving the voltages it'...
- 69
6
votes
4
answers
749
views
Using 50 Ω coax cable instead of passive probe
Preface, why am I asking this question?
Instead of using a passive probe with a ground clip, I want a more "permanent" and reliable connection for my measurements. Note: I'm not talking ...
- 1,031
0
votes
0
answers
14
views
Pulse width modulation using ML4800CP
I am working on a SMPS (450 V output). It use an ML4800CP IC to control and manage 450 V DC.
How can I measure the PWM signal using an oscilloscope? I attached it, and it worked well for the PFC ...
0
votes
0
answers
52
views
What could be the possible reason for waveform distortion while connecting differential probe GND with single ended probe GND?
I am measuring following waveforms using a DSO:
Case 1:
Waveform 1 wrt GND using differtial probe.
Waveform 2 wrt GND using single ended probe.
Result 1: Waveform 1 distorted.
Case 2:
Waveform 1 wrt ...
- 3,032
0
votes
0
answers
104
views
Connecting LVDS to oscilloscope using ferrite bead to isolate GND/SHIELD
I want to measure LVDS signals with a scope.
Will my solution work? (Shown at bottom.)
I know of other ways of doing this, but I am hoping this way is cleaner and easier.
Specs:
Frequency:~100MHz
...
- 683
-1
votes
2
answers
542
views
How to measure the output voltage of a half wave, bridge and center tapped rectifier circuit using a multimeter and also a signal on oscilloscope
I am pretty new in electronics. I am curious about how to test the output voltage of the rectifier using DMM. Where to put the lead to get the voltage from a circuit. Do I have to measure it across ...
0
votes
2
answers
143
views
Doing digital IoT and some analog circuits without an oscilloscope
In my free time, I do electronic stuff as a hobby (at least for now.) I don't own an oscilloscope or a fancy multimeter due to the terrible financial state of my country. I am in Iran.
In some ...
0
votes
2
answers
416
views
Using a multimeter to measure the VPP directly from an AWG output, how to?
tomorrow I'll have a lab class and we were told what we'll do in advance. So, since I don't want to be unprepared I started thinking about how to "solve" the problems, and I'm hardstuck at ...
- 101
0
votes
1
answer
3k
views
Measuring Ethernet Waveform on a scope
I measured the following waveform on a scope. It is a 100MBps Ethernet signal and I am measuring the TX+ and Tx- signals between the magnetics and RJ45 connector.
I see what looks like a double ...
- 217
2
votes
2
answers
2k
views
Measuring AC with a DC offset using a digital multi-meter
I got a bit confused about how AC voltmeters on digital multi-meters work. I don't want to know about for example sampling method or conversion of analog to digital data. I need to know whether it can ...
29
votes
3
answers
9k
views
Can an oscilloscope be used as an EKG?
I was at my doctor's office and noticed an EKG machine that looked like a standard oscilloscope. In fact, its case was almost identical to my dual channel Tektonix 1104b. The main difference was that ...
- 2,397
0
votes
2
answers
1k
views
Analog Oscilloscope Flickering Signal Problem
I am using BK Precision 2125C Dual Trace Oscilloscope (30 MHz), which is analog. I'm trying to observe signal generated by the output of microprocessor. I'm seeing flickering signal (quickly moves ...
- 2,432
6
votes
1
answer
358
views
Transformer different resulting current and voltage than expected
I am uncertain why the current on the secondary side does not follow the equation:
$$i_2 = \frac{N_1}{N_2} i_1$$
which gives
$$i_2 = \frac{20}{3} i_1$$
To measure the current I use two 1 ohm resistors ...
- 63
2
votes
2
answers
312
views
Practical formula/method to predict the necessity of termination resistor
I am not into high frequency much and just know about ringing caused by reflections due to impedance mismatching in transmission lines.
So I recently saw some non-engineer researchers in a lab that ...
- 1,468