so confused smd distortion detector?

[Bettr n' Revrse 5,000+ posts]

using an oscope is easy as hell. if you can't look at a smooth curvy wave and turn the gain up then stop when it gets to a straight square wave then you're retarded.

But like was said a good one is pricey and most good ones arernt very portable...

 

[slim2fattycake 10+ year member]

they aren't pricy for the portable ones.

VELLEMAN HPS10 Handheld Oscilloscope 2MHz Bandwidth

They can probably be found cheaper. I got mine for 100.

Here is one with backlight

Handheld O'Scope (hps10se)

I think I have seen them for 160ish before.

 

[Bettr n' Revrse 5,000+ posts]

they aren't pricy for the portable ones.

Fair enough...

 

[optimusprime 10+ year member]

i wish i had the extra money to buy one just so i could take it apart and see whats inside it

 

[optimusprime 10+ year member]

kinda waiting for ashton kutcher to jump out of no where and go " WAHHHHHH YOU JUST GOT PUNK'D!!" in the videos of mr.meade showing how to use it

 

[Decaf 10+ year member]

the dd-1 detects anything besides the fundamental frequency of 40hz or 1000hz

40hz sine wave/40hz clipped sine wave, notice the harmonic distortion introduced by a +2.1db waveform

see the -10db peak at 120hz, then 200hz and so on

 

[optimusprime 10+ year member]

the dd-1 detects anything besides the fundamental frequency of 40hz or 1000hz
40hz sine wave/40hz clipped sine wave, notice the harmonic distortion introduced by a +2.1db waveform

see the -10db peak at 120hz, then 200hz and so on

but how?

 

[tommyk90 5,000+ posts]

I remember seeing circuitry pics posted somewhere. I'll try to find them.

 

[tommyk90 5,000+ posts]

Found them:

 

[kingmanbc 10+ year member]

you can set your amps easily without that "thing"

 

[nauc 10+ year member]

i got the Velleman HPS10 scope for $120 and compared it to my buddies dads $1k+ scope. it was dead on.

HPS10, Portable handheld oscilloscope, 10MS/s HPS10 - All Spectrum Electronics

ps, scopes arent hard to use at all. i love mine

 

[RAM_Designs 5,000+ posts]

Who needs to mess with gains when you have 8V pre-outs and ample headroom? I just set my ish to bare minimum and use my t/a to attenuate the channels individually. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[Decaf 10+ year member]

again, harmonic distortion is different then looking for flat spots with your eyes/scope display

anyone would say the waveform below is clean and has no clipping since u see no flat spots. well guess what...? the dd-1 would light up red because i pushed it .1db into clipping which you cannot see, but the dd-1 will detect the harmonics introduced that the handy scope isnt letting you see

even audacity labels it as 0db, it takes a minuscule amount of distortion to trip the dd-1, and your eyes simply are not as accurate, as the above test shows

 

[hispls 5,000+ posts]

again, harmonic distortion is different then looking for flat spots with your eyes/scope display
anyone would say the waveform below is clean and has no clipping since u see no flat spots. well guess what...? the dd-1 would light up red because i pushed it .1db into clipping which you cannot see, but the dd-1 will detect the harmonics introduced that the handy scope isnt letting you see

even audacity labels it as 0db, it takes a minuscule amount of distortion to trip the dd-1, and your eyes simply are not as accurate, as the above test shows

So you can assure absolutely no distortion at 60hz. Seems really handy if you drive around listening to 60hz tone.

Wouldn't it be optimum to test for distortion/clipping at whatever frequency impedence is the lowest your amp will see? I've measured well over 20 ohms out of a .4ohm nominal load at resonance....pretty sure what the amp does for distortion at 20 ohms or more is a bit different than what it would do at .4

Nut-huggers gonna hug.

 

[nauc 10+ year member]

"anyone would say the waveform below is clean and has no clipping since u see no flat spots. well guess what...? the dd-1 would light up red because i pushed it .1db into clipping which you cannot see, but the dd-1 will detect the harmonics introduced that the handy scope isnt letting you see"

well now we know to turn down our volume one click and now we know we dont need the dd-1 //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif