Old Distortion Analyzer and Audio Analzyer - Electronic Circuits Projects Diagrams Free

walters · 24th January 2006, 07:56 PM

For the Old Distortion Analyzer you had to "null" out the fundamental frequency how was this done?

How do i check the 2nd harmonic?

The audio Analzyers had a intermodulation analyer how do u use this please?

How do u do a Harmonic Distortion Test?

How to Measure the 2nd harmonic Distortion test?

audioguru · 24th January 2006, 09:49 PM

Quote:

Originally Posted by walters

For the Old Distortion Analyzer you had to "null" out the fundamental frequency how was this done?

How do i check the 2nd harmonic?

The audio Analzyers had a intermodulation analyer how do u use this please?

How do u do a Harmonic Distortion Test?

How to Measure the 2nd harmonic Distortion test?

Yes. :lol: :lol:
It was lots of fun.

walters · 24th January 2006, 11:46 PM

i bet it seems hard

audioguru · 25th January 2006, 12:20 AM

Operating an old "null" distortion analyser wasn't hard, just time-consuming if you wanted to measure distortion at many frequencies. Modern FFT analysis shows nearly all distortion at a single glance.

walters · 25th January 2006, 12:27 AM

null" distortion analyser wasn't hard, just time-consuming if you wanted to measure distortion at many frequencies.

How did u have to "null" them out ?

Which harmonics did u have to null out?

How to measure the distortion?

audioguru · 25th January 2006, 12:50 AM

Walters,
You are asking questions about harmonic distortion without knowing anything about it. Try Google first before asking basic questions here.

You don't null harmonics, they are the distortion. You null the fundamental frequency.
An AC meter or 'scope showed the level of the harmonic distortion as a percentage of the level of the fundamental.

walters · 25th January 2006, 12:56 AM

You don't null harmonics, they are the distortion.

So Harmonics= Distortion?

Whats the different between Harmonics VS frequencys?

"You null the fundamental frequency"

WHy dou null the fundamental Frequency?

An AC meter or 'scope showed the level of the harmonic distortion as a percentage of the level of the fundamental.

On the Scope what does Harmonic Distortion look like?

What are good harmonic distortion VS bad harmonic distortion when view or looking on the oscilloscope please?

audioguru · 25th January 2006, 01:30 AM

Don't ask simple basic questions here, look in Google and learn it yourself.

walters · 25th January 2006, 03:28 AM

theses aren't simple basic questions

audioguru · 25th January 2006, 03:49 AM

Quote:

Originally Posted by walters

theses aren't simple basic questions

They sure are simple basic questions. They show that you know nothing about distortion and a distortion analyser.
They show that you haven't bothered looking for the answers yourself.

You seem to be just reading the index or just looking at the pictures in a textbook without reading its articles. :cry:

walters · 25th January 2006, 03:55 AM

can u please help me out with this then because i don't know about
distortion and a distortion analyser and about harmonics and harmonic distiortion

1.) How do measure distortion?
2.) What is a Distortion Analyer?
3.) How to measure Harmonics?
4.) How to measure Harominc distortion?

What is the 2nd harmonic distortion? why is it not good ?

audioguru · 25th January 2006, 04:26 AM

Walters,
In Google I entered How To Measure Harmonic Distortion and links on the 1st page answered all your questions. Some are confusing so maybe a textbook is best.

2nd harmonic distortion is called even-harmonics distortion and usually includes all the other even-numbered harmonics in the total of its distortion. It is caused by a non-linear device passing a positive or negative part of a waveform more or less than the other, like a rectifier.

A Jimmy Hendricks "fuzz-face" circuit produces severe 2nd (and others) harmonic distortion.
An ordinary transistor without negative feedback produces 2nd (and others) harmonic distortion:

walters · 25th January 2006, 04:45 AM

Thanks for the help

"2nd harmonic distortion is called even-harmonics distortion and usually includes all the other even-numbered harmonics in the total of its distortion."

Is 2nd harmonic distortion comes from the silicon transitor or germanium transistor?

What causes the 2nd harmonic distortion?

I thought Tubes produced odd harmonics not even so tubes don't have 2nd harmonic distortion?

"It is caused by a non-linear device passing a positive or negative part of a waveform more or less than the other, like a rectifier"

This part i don't understand passing a positive or negative part of a wavefrom?

A rectifier has 2nd harmonic distortion?

A Jimmy Hendricks "fuzz-face" circuit produces severe 2nd (and others) harmonic distortion.

How and Why?

Why does negative feedback produce 2nd harmonic distortion?

"An ordinary transistor without negative feedback produces 2nd (and others) harmonic distortion"

with out negative feedback its still causes 2nd harmonic distortion Why and where? and how?

_3iMaJ · 25th January 2006, 04:59 AM

Why even bother anymore? Go to college.

walters · 25th January 2006, 05:10 AM

my college didn't or book didn't teach this stuff sorry

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24th January 2006, 07:56 PM	(permalink)
walters	Old Distortion Analyzer and Audio Analzyer For the Old Distortion Analyzer you had to "null" out the fundamental frequency how was this done? How do i check the 2nd harmonic? The audio Analzyers had a intermodulation analyer how do u use this please? How do u do a Harmonic Distortion Test? How to Measure the 2nd harmonic Distortion test?

24th January 2006, 11:46 PM	(permalink)
walters	i bet it seems hard

25th January 2006, 12:20 AM	(permalink)
audioguru	Operating an old "null" distortion analyser wasn't hard, just time-consuming if you wanted to measure distortion at many frequencies. Modern FFT analysis shows nearly all distortion at a single glance. __________________ Uncle $crooge

25th January 2006, 12:27 AM	(permalink)
walters	null" distortion analyser wasn't hard, just time-consuming if you wanted to measure distortion at many frequencies. How did u have to "null" them out ? Which harmonics did u have to null out? How to measure the distortion?

25th January 2006, 12:50 AM	(permalink)
audioguru	Walters, You are asking questions about harmonic distortion without knowing anything about it. Try Google first before asking basic questions here. You don't null harmonics, they are the distortion. You null the fundamental frequency. An AC meter or 'scope showed the level of the harmonic distortion as a percentage of the level of the fundamental. __________________ Uncle $crooge

25th January 2006, 12:56 AM	(permalink)
walters	You don't null harmonics, they are the distortion. So Harmonics= Distortion? Whats the different between Harmonics VS frequencys? "You null the fundamental frequency" WHy dou null the fundamental Frequency? An AC meter or 'scope showed the level of the harmonic distortion as a percentage of the level of the fundamental. On the Scope what does Harmonic Distortion look like? What are good harmonic distortion VS bad harmonic distortion when view or looking on the oscilloscope please?

25th January 2006, 01:30 AM	(permalink)
audioguru	Don't ask simple basic questions here, look in Google and learn it yourself. __________________ Uncle $crooge

25th January 2006, 03:28 AM	(permalink)
walters	theses aren't simple basic questions

25th January 2006, 03:55 AM	(permalink)
walters	can u please help me out with this then because i don't know about distortion and a distortion analyser and about harmonics and harmonic distiortion 1.) How do measure distortion? 2.) What is a Distortion Analyer? 3.) How to measure Harmonics? 4.) How to measure Harominc distortion? What is the 2nd harmonic distortion? why is it not good ?

25th January 2006, 04:45 AM	(permalink)
walters	Thanks for the help "2nd harmonic distortion is called even-harmonics distortion and usually includes all the other even-numbered harmonics in the total of its distortion." Is 2nd harmonic distortion comes from the silicon transitor or germanium transistor? What causes the 2nd harmonic distortion? I thought Tubes produced odd harmonics not even so tubes don't have 2nd harmonic distortion? "It is caused by a non-linear device passing a positive or negative part of a waveform more or less than the other, like a rectifier" This part i don't understand passing a positive or negative part of a wavefrom? A rectifier has 2nd harmonic distortion? A Jimmy Hendricks "fuzz-face" circuit produces severe 2nd (and others) harmonic distortion. How and Why? Why does negative feedback produce 2nd harmonic distortion? "An ordinary transistor without negative feedback produces 2nd (and others) harmonic distortion" with out negative feedback its still causes 2nd harmonic distortion Why and where? and how?

25th January 2006, 04:59 AM	(permalink)
_3iMaJ	Why even bother anymore? Go to college.

25th January 2006, 05:10 AM	(permalink)
walters	my college didn't or book didn't teach this stuff sorry