Closed Thread
Results 1 to 12 of 12

Reload Thread: What does this mean on an oscilloscope?

  1. #1
    TDot's Avatar
    TDot is offline Member



    Join Date
    Oct 2012
    Location
    Bronx
    Posts
    148
    Post Thanks / Like
    Mentioned
    0 Post(s)

    What does this mean on an oscilloscope?



    I only tested this out the amp, so it might be caused by the 360.3, which I doubt; or the car itself. However, I'm asking if this could be caused by bad power? Or simply what would be the most common cause of this, and the best way to narrow it down and repair. No big 3, I'll consider that once I've narrowed this down to specifically needing that.







  2. #2
    macsdad's Avatar
    macsdad is online now boom-boom



    Join Date
    Jun 2010
    Location
    birmingham, Al
    Posts
    1,374
    Post Thanks / Like
    Mentioned
    10 Post(s)

    Re: What does this mean on an oscilloscope?

    Not good, unclean signal.




  3. #3
    basswiigee's Avatar
    basswiigee is offline CarAudio.com Veteran



    Join Date
    Apr 2013
    Location
    MICHIGAN
    Posts
    3,220
    Post Thanks / Like
    Mentioned
    23 Post(s)

    Re: What does this mean on an oscilloscope?

    Quote Originally Posted by macsdad View Post
    Not good, unclean signal.
    ↑↑↑this↑↑↑




    H.U. - Pioneer P7200HD
    Fronts - Pioneer premier TS-C720PRS
    Rear - Pioneer TS-D6902R
    Amp - kx2500.1
    Sub - AQ HDC4 12
    just a lil' slam for now.... tuned to 33hz!!!!!

    complete budget system under 400.00... (kenwoods)
    http://www.youtube.com/watch?v=YtyFmWXI94U&list=LLCQ1MqkfSOcRep6vDFWsWxg

  4. #4
    macsdad's Avatar
    macsdad is online now boom-boom



    Join Date
    Jun 2010
    Location
    birmingham, Al
    Posts
    1,374
    Post Thanks / Like
    Mentioned
    10 Post(s)

    Re: What does this mean on an oscilloscope?

    That type of read-out typically means that the gains are to high, asking the amp to do more than it can.




  5. #5
    RangerDangerV2's Avatar
    RangerDangerV2 is offline CarAudio.com Veteran



    Join Date
    Nov 2011
    Location
    st cloud MN
    Posts
    4,869
    Post Thanks / Like
    Mentioned
    72 Post(s)

    Re: What does this mean on an oscilloscope?

    Quote Originally Posted by macsdad View Post
    That type of read-out typically means that the gains are to high, asking the amp to do more than it can.
    actually, that shows up as a square wave.




  6. #6
    macsdad's Avatar
    macsdad is online now boom-boom



    Join Date
    Jun 2010
    Location
    birmingham, Al
    Posts
    1,374
    Post Thanks / Like
    Mentioned
    10 Post(s)

    Re: What does this mean on an oscilloscope?

    Quote Originally Posted by DbDesigns View Post
    actually, that shows up as a square wave.
    Cool, thanx for the correction, I'm still learning too.




  7. #7
    Foulplay's Avatar
    Foulplay is offline Member



    Join Date
    Apr 2013
    Location
    ms
    Posts
    51
    Post Thanks / Like
    Mentioned
    2 Post(s)

    Re: What does this mean on an oscilloscope?

    I have a scope and mine squares off as well. So what does this mean? Light clip?




  8. #8
    TDot's Avatar
    TDot is offline Member

    Threadstarter


    Join Date
    Oct 2012
    Location
    Bronx
    Posts
    148
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: What does this mean on an oscilloscope?

    Can the bad signal be due to power/grounding, or is it strictly an audio issue?
    If it can be power/ground can I hook the oscilloscope up directly to the distribution blocks to see what's happening? If so, what settings should I set the scope to?




  9. #9
    RangerDangerV2's Avatar
    RangerDangerV2 is offline CarAudio.com Veteran



    Join Date
    Nov 2011
    Location
    st cloud MN
    Posts
    4,869
    Post Thanks / Like
    Mentioned
    72 Post(s)

    Re: What does this mean on an oscilloscope?

    Quote Originally Posted by macsdad View Post
    Cool, thanx for the correction, I'm still learning too.
    no prob, a square wave will look like like a wave with squared off tops and sides. too lazy to post a pic, so just google it.
    Quote Originally Posted by Foulplay View Post
    I have a scope and mine squares off as well. So what does this mean? Light clip?
    if it is a total square wave that is bad. full clipping. you dont want to clip at all
    Quote Originally Posted by TDot View Post
    Can the bad signal be due to power/grounding, or is it strictly an audio issue?
    If it can be power/ground can I hook the oscilloscope up directly to the distribution blocks to see what's happening? If so, what settings should I set the scope to?
    youre settings seem to be correct, 2v divisions, but try to set the ms higher or lower. been a while since I used a scope.




  10. #10
    Foulplay's Avatar
    Foulplay is offline Member



    Join Date
    Apr 2013
    Location
    ms
    Posts
    51
    Post Thanks / Like
    Mentioned
    2 Post(s)

    Re: What does this mean on an oscilloscope?

    I set my gains so I have a smooth wave. Just never noticed it looking like his picture. Might need to make it larger then try it agian. Just so I can try and replicate this. Always learning




  11. #11
    maylar's Avatar
    maylar is offline Electrical Weenie



    Join Date
    Jan 2002
    Location
    Connecticut
    Age
    62
    Posts
    3,443
    Post Thanks / Like
    Mentioned
    13 Post(s)

    Re: What does this mean on an oscilloscope?

    Quote Originally Posted by TDot View Post
    Can the bad signal be due to power/grounding, or is it strictly an audio issue?
    If it can be power/ground can I hook the oscilloscope up directly to the distribution blocks to see what's happening? If so, what settings should I set the scope to?
    What you're looking at might not be "real". It could be noise being picked up by your connections. The fuzzy sides and non symmetrical look kinda indicate that. Also, your waveform is off the screen. The bottom half of the signal can't be seen. You could be driving the scope input into a nonlinear region.

    You need to get the scope trace centered with no offset so you can see the entire waveform. I assume you're looking across amp output terminals and there should be no DC offset there, but doublecheck that with a DMM.



    dave
    ----------
    1999 Buick Park Ave Ultra
    Head Unit: JVC KWHDR720
    EQ: Audiocontrol EQL
    Front Stage: Hybrid Audio Technologies Imagine 5.25 mids, Morel Maximo tweets
    Sub Stage: Boston G3 10", 0.5 cu ft sealed
    Amp: PPI Phantom 900.4
    Rear Fill: Boston SE953 6X9's

  12. #12
    pawn man's Avatar
    pawn man is offline CarAudio.com Elite



    Join Date
    Apr 2008
    Location
    albany ga.
    Posts
    1,903
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: What does this mean on an oscilloscope?

    it looks like some kind of distortion. it may be some sort of engine noise or actual distorted signal.



    2010 American Record Holder 1st place Stock pro 1 158.0 DB

    dbDrag Street C - 2008 Florida State Champ - 152.1
    IASCA ProStock 2 - 2008 Florida State Champ - 153.1
    2008 SpringBreak Nats - 2nd Place Advanced NoWall - 155.9

Closed Thread

Similar Threads

  1. What does this mean on an amplifier
    By ForceEdge in forum Amplifiers
    Replies: 3
    Last Post: 12-28-2012, 10:30 AM
  2. 12V and 14.4V... WHAT DOES THIS MEAN?!?!?!
    By Epitaph to War in forum General Discussion
    Replies: 5
    Last Post: 10-24-2002, 10:23 PM
  3. what does this mean?
    By scsi in forum General Discussion
    Replies: 2
    Last Post: 07-01-2002, 03:47 AM
  4. Capacitors can "arc"? What does this mean?
    By 31337hxr in forum General Discussion
    Replies: 5
    Last Post: 05-03-2002, 08:08 PM
  5. Fuse requirement: 30A x 2...what does this mean?
    By 31337hxr in forum Amplifiers
    Replies: 1
    Last Post: 04-27-2002, 02:07 AM

Posting Permissions

  • You may not post new threads
  • You may post replies
  • You may post attachments
  • You may edit your posts
1e2 Forum