Measuring Pulse width modulation PWM

[walters]

How do i measure Pulse width Modulation (PWM) ?
with a oscilloscope?

How do i measure the Duty Cycle of the PWM?
with a oscilloscope?

How do i measure the Pulse width?
with a oscilloscope?


How do i measure the Time constant?
with a oscilloscope?


How do i measure the rise time and fall time?
with a oscilloscope?

how to Measure the Period and frequency of the PWM?
with a oscilloscope?

 

[Russlk]

You answered your own question, so what is your question?

 

[walters]

No i mean how do i do it step by step i don't know what to look for
and how to do it

I know i need to use the oscilloscope but i don't know how to measure
this stuff step by step process can your please help me out?

 

[Russlk]

The oscilloscope has two connections: the ground clip and the probe. connect the clip to ground and the probe to the circuit. There is a verticle position control, set it so the wave form is visible. There is also a horizontal position control, set it so the waveform starts at the left. Set the sweep control to expand the waveform so it suits you. There is also some trigger controls. Set it on auto to begin with. Later, you can try other settings and twiddle with the sync or level control. Has this helped?

 

[walters]

Thanks yes

but im talking more about how to Count the gradules and do formulas
to get the rise time,pulse width,how to actually measure this stuff
that i listed. Have to look at the PWM waveform on the oscilloscope
and count the gradules and look at the time settings and do some
formulas and stuff i don't know how to do this stuff please help me ?

 

[walters]

How do i measure Pulse width Modulation (PWM) ?

How do i count the gradules and what formulas do i need to
Measure this on the oscilloscope?

How do i measure the Duty Cycle of the PWM?
with a oscilloscope?

How do i count the gradules and what formulas do i need to
Measure this on the oscilloscope?

How do i measure the Pulse width?
with a oscilloscope?

How do i count the gradules and what formulas do i need to
Measure this on the oscilloscope?


How do i measure the Time constant?
with a oscilloscope?

How do i count the gradules and what formulas do i need to
Measure this on the oscilloscope?

How do i measure the rise time and fall time?
with a oscilloscope?

How do i count the gradules and what formulas do i need to
Measure this on the oscilloscope?

how to Measure the Period and frequency of the PWM?
with a oscilloscope?

How do i count the gradules and what formulas do i need to
Measure this on the oscilloscope?

 

[zachtheterrible]

https://www.electro-tech-online.com/threads/i-want-to-build-a-mic-amplifier.240/

Hey walters, there is a whole bit on PWM in this theory article with formulas and explanations.

 

[Styx]

HEY walters
Whats with being RUDE!!!!11111one!!!!!

repeating the same question twice and equally within the question repeating multiple time what you want!


It sounds like the real problem is how to use a scope since calculation of duty cycle is just

Ton/Tperiod * 100


Thus if you can get the squarewave on the scope you can then measure the period and also hte time that is is HIGH (or LOW dependant on what you want)

--EDIT--

looking over your question's again it is looking more and more like "how to use a scope". It would really help if you ask the right question

Take the "how do I measure rise and fall time". All that is is changing the timebase of the scope so you can see the slew rate of the signal and measure the time for it to go from 10% of the level to 90% of the level

 

[walters]

Sorry if i was rude i didn't mean it to come off like that if it did


https://www.electro-tech-online.com/threads/i-want-to-build-a-mic-amplifier.240/

I just copied this ocilloscope page and the color yellow for the oscilloscope
lines didn't print can you guys help me try to print the oscilloscope waveforms on this hyperlink its such a really good page on oscilloscopes
but its painted in yellow

 

[Styx]

best bet is to save the page as a HTML file, this will d/l all the piccies to encapsolate the webpage.

The open in yr favoirte image editor (I would recomend GIMP) and do what you think best to improve the situation

I would recommend remving the GRAY background and changing YELLOW for a darker colour

 

[walters]

That seems really hard to do but thanks for the information

 

[Styx]

give me 5min

 

[Styx]

here you go

 

[walters]

I clicked on the download hyperlink but it doesn't do anything
does it work for you ?

 

[Styx]

yes but here is a corrected one.

 

[Styx]

failing that

**broken link removed**

 

[walters]

I Tried it again on the new one and it didn't work sorry maybe im
doing something wrong?

 

[walters]

Thanks alot dude i think this will work now the Blue lines on the PDF file

 

[walters]

Yea i printed it out if worked thats alot for doing that for me so i can
print this out now thanks

 

[Styx]

np, as I said it was only a 5min tast so not to bad, a bit of gimping to correct the colours and increase the definition