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Road Warrior
Joined: Feb 2016
Posts: 1,354
Likes: 399
From: Vancouver, BC
Teedoff, I mentioned in that other thread that the pics showed a signal that wasn't clipped. A clipped signal is painfully obvious with very clearly defined plateaus that will "round out" (a subjective term depending on screen resolution) with peaks appearing as you back off on the gain setting. Even the cheapest low-end o-scope is useful and easier to use than a DMM+calcualtor/cheatsheet.
To those that don't already have a DMM and/or a wife with excellent hearing (btw, ears are still the best way to set gains IMO) you should check out these low-cost oscilloscopes as they cost about the same to buy and are way easier to use. Oh, and these portable o-scopes can still operate as a DMM.
Last edited by hamah; Nov 2, 2021 at 12:28 PM.
Thread Starter
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Road Master
Joined: Apr 2021
Posts: 981
Likes: 134
From: Vancouver Canada
Thanks Fireball. So I'll set to 28.3V with the bike on, GZ X @ 80Hz & Neo's X @ 120Hz using a 1000Hz - 10DB test tone from Amazon Music & go from there.
Thread Starter
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Road Master
Joined: Apr 2021
Posts: 981
Likes: 134
From: Vancouver Canada
Using an aftermarket head unit I hopefully won't have this issue.
Club Member
Joined: Jun 2017
Posts: 1,149
Likes: 386
From: Indianapolis, IN
So when I turn it down @ 1.5 volts then, the fuzz goes away... so I'll be doing more dialing in this weekend, I'll know for sure how close they are to detecting distortion at the same point in volts
Also, the Lumi displays the volts and the wave once it is set
Seasoned HDF Member
Joined: Jul 2017
Posts: 5,749
Likes: 1,603
From: High Point, NC.
^^^ this
Teedoff, I mentioned in that other thread that the pics showed a signal that wasn't clipped. A clipped signal is painfully obvious with very clearly defined plateaus that will "round out" (a subjective term depending on screen resolution) with peaks appearing as you back off on the gain setting. Even the cheapest low-end o-scope is useful and easier to use than a DMM+calcualtor/cheatsheet.
To those that don't already have a DMM and/or a wife with excellent hearing (btw, ears are still the best way to set gains IMO) you should check out these low-cost oscilloscopes as they cost about the same to buy and are way easier to use. Oh, and these portable o-scopes can still operate as a DMM.
Teedoff, I mentioned in that other thread that the pics showed a signal that wasn't clipped. A clipped signal is painfully obvious with very clearly defined plateaus that will "round out" (a subjective term depending on screen resolution) with peaks appearing as you back off on the gain setting. Even the cheapest low-end o-scope is useful and easier to use than a DMM+calcualtor/cheatsheet.
To those that don't already have a DMM and/or a wife with excellent hearing (btw, ears are still the best way to set gains IMO) you should check out these low-cost oscilloscopes as they cost about the same to buy and are way easier to use. Oh, and these portable o-scopes can still operate as a DMM.
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Grand HDF Member
Joined: Sep 2017
Posts: 3,716
Likes: 919
From: Southern Virginia
I have an old CRT Tektronics scope from the early nineties that I would use from time to time. I finally decided to get a cheap handheld scope and was surprised at how well it worked. The sinewave was perfectly clear and easy to distinguish between clipping and clean. If someone has a scope that never shows a clean sinewave I would be suspicious of it.
I got the scope that this fellow shows in his video and use it often:
He gets to the nitty gritty at about eight minutes into the video.
I got the scope that this fellow shows in his video and use it often:
He gets to the nitty gritty at about eight minutes into the video.
Seasoned HDF Member
Joined: Jul 2017
Posts: 5,749
Likes: 1,603
From: High Point, NC.
I have an old CRT Tektronics scope from the early nineties that I would use from time to time. I finally decided to get a cheap handheld scope and was surprised at how well it worked. The sinewave was perfectly clear and easy to distinguish between clipping and clean. If someone has a scope that never shows a clean sinewave I would be suspicious of it.
I got the scope that this fellow shows in his video and use it often:
Set Amplifier Gain with cheap $40 Oscilloscope
He gets to the nitty gritty at about eight minutes into the video.
I got the scope that this fellow shows in his video and use it often:
Set Amplifier Gain with cheap $40 Oscilloscope
He gets to the nitty gritty at about eight minutes into the video.
This one is the pics I posted in the other thread hamah is referring too. I guess I was expecting to see a smooth line until it clipped. To me that wasn't the case.
You can see how ugly those lines are. At 39v there shouldnt be any clipping and while there isnt a flat wave at the top, the rest of the pixelation going on scared me. Again, perhaps its how I have the scope set or something. Would love to figure it out and be able to use it in the future, but it also makes for a very good MM, so there's that.
Last edited by teedoff65; Nov 3, 2021 at 09:34 AM.