Closed Thread
Page 1 of 4 1 2 3 4 LastLast
Results 1 to 15 of 48

Reload Thread: Why you need an oscilloscope

  1. #1
    maylar's Avatar
    maylar is offline Electrical Weenie



    Join Date
    Jan 2002
    Location
    Connecticut
    Age
    62
    Posts
    3,439
    Post Thanks / Like
    Mentioned
    13 Post(s)

    Why you need an oscilloscope

    I had a chance to play with my little DSO Nano digital 'scope and I thought I'd share what it told me about my system.

    First I wanted to find the maximum volume setting from my HU. I monitored the front speaker outputs and input a 100Hz 0 dB source in the CD player. Classic clipping at 34/50 volume. With a -5dB source I could get to 38/50. I decided that 32/50 was my max setting. Note the voltage is 24v p-p which is battery rails. This is with engine off:



    Next I checked the output of my David Navone LOC at 40 Hz and volume 32/50:



    Well now, that's a funky waveform. It cleaned up to a nice sine wave at 100 Hz but I think I'll send this to David Navone and ask him wtf.

    My final revalation was when setting the gain on my sub amp (bridged rear channels) at 40 Hz volume 32/50:



    The revalation is that with engine not running I only get 22.9 vrms = 131 watts before clipping. I started the engine and at 13.5 vdc I could get 200 watts. I did not expect that much difference. And no wonder my G3 sub barely moves...

    What a useful tool this is. Worth the 80 bucks.



    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

  2. Thanks TaylorFade, Joe89 thanked for this post
    Likes subzero, av83, Joe89 liked this post



  3. #2
    Join Date
    Jan 2007
    Location
    any wet spot i can find
    Posts
    3,282
    Post Thanks / Like
    Mentioned
    50 Post(s)

    Re: Why you need an oscilloscope

    Quote Originally Posted by maylar View Post
    I had a chance to play with my little DSO Nano digital 'scope and I thought I'd share what it told me about my system.

    First I wanted to find the maximum volume setting from my HU. I monitored the front speaker outputs and input a 100Hz 0 dB source in the CD player. Classic clipping at 34/50 volume. With a -5dB source I could get to 38/50. I decided that 32/50 was my max setting. Note the voltage is 24v p-p which is battery rails. This is with engine off:



    Next I checked the output of my David Navone LOC at 40 Hz and volume 32/50:



    Well now, that's a funky waveform. It cleaned up to a nice sine wave at 100 Hz but I think I'll send this to David Navone and ask him wtf.

    My final revalation was when setting the gain on my sub amp (bridged rear channels) at 40 Hz volume 32/50:



    The revalation is that with engine not running I only get 22.9 vrms = 131 watts before clipping. I started the engine and at 13.5 vdc I could get 200 watts. I did not expect that much difference. And no wonder my G3 sub barely moves...

    What a useful tool this is. Worth the 80 bucks.
    well worth $80. That second pic is showing a little distortion, but no clipping like the other two.




    "Bailout: Taking a trillion dollars from the people and giving it to the banks so the banks can loan it back to the people, at interest!"

  4. Thanks Joe89 thanked for this post
    Likes Joe89 liked this post
  5. #3
    maylar's Avatar
    maylar is offline Electrical Weenie

    Threadstarter


    Join Date
    Jan 2002
    Location
    Connecticut
    Age
    62
    Posts
    3,439
    Post Thanks / Like
    Mentioned
    13 Post(s)

    Re: Why you need an oscilloscope

    Quote Originally Posted by quackhead View Post
    well worth $80. That second pic is showing a little distortion, but no clipping like the other two.
    Which is why the scope is so valuable. A DMM would never reveal that.



    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

  6. Likes subzero, quackhead liked this post
  7. #4
    BrownVanMan's Avatar
    BrownVanMan is offline CarAudio.com Elite



    Join Date
    May 2009
    Location
    Minneapolis MN
    Posts
    1,981
    Post Thanks / Like
    Mentioned
    8 Post(s)

    Re: Why you need an oscilloscope

    Does this tool work as a dmm as well?




  8. #5
    BassAddictJ's Avatar
    BassAddictJ is offline CarAudio.com Veteran



    Join Date
    Apr 2005
    Location
    FL
    Posts
    12,597
    Post Thanks / Like
    Images
    1
    Mentioned
    5 Post(s)

    Re: Why you need an oscilloscope

    link to where to get one???

    for $80bucks that's a deal...



    Team American Power Systems
    Pioneer Avic N5 Navi + CD-UB100 USB Adapter. RARE Circa 1996 PPI Ax606.2 in BLACK (1 of 400ish made) with 2 rare black graphic spacers.
    CDT DRT-25 1'' Silk Dome Tweeters / CDT ES-04 4'' Midranges / RE Audio XXX 6.5'' 2ohm Neo Mids In Glassed Kick Pods
    American Power Systems 240amp H.O. Alty / (2) Deka 8a31, 1/0 front to back.
    Unknown Prototype 3k @ 1ohm. TRF/PSI 8 layer 4in coil hybrid beast in 3 cubs @ 33Hz / Raammat 40sqft in the trunk.
    Quote Originally Posted by Haunz View Post
    You could put 12V to my balls and clamp my dick to get 3kW+.
    Quote Originally Posted by Slayerx View Post
    Glad this got bumped so I could fap to it again.

  9. #6
    fasfocus00's Avatar
    fasfocus00 is online now doITdaWHITEwayORdoITtwice



    Join Date
    Jun 2007
    Location
    New Orleans, LA
    Posts
    5,384
    Post Thanks / Like
    Mentioned
    5 Post(s)

    Re: Why you need an oscilloscope

    Quote Originally Posted by BassAddictJ View Post
    link to where to get one???

    for $80bucks that's a deal...
    there all over ebay, just search nano oscilliscope.



    Here is my feedback Thread: http://www.caraudio.com/forum/showth...ght=fasfocus00

    "If you ain't cheatin', You ain't trying"

  10. #7
    maylar's Avatar
    maylar is offline Electrical Weenie

    Threadstarter


    Join Date
    Jan 2002
    Location
    Connecticut
    Age
    62
    Posts
    3,439
    Post Thanks / Like
    Mentioned
    13 Post(s)

    Re: Why you need an oscilloscope

    Quote Originally Posted by BrownVanMan View Post
    Does this tool work as a dmm as well?
    Volts and frequency. Not ohms.

    Quote Originally Posted by BassAddictJ View Post
    link to where to get one???

    for $80bucks that's a deal...
    Seems the price has dropped... here's the vendor I bought mine from:

    ARM DSO Nano Pocket-Sized Portable Digital Oscilloscope | eBay



    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

  11. #8
    CJL's Avatar
    CJL
    CJL is offline CarAudio.com Veteran



    Join Date
    Mar 2006
    Location
    oZone
    Posts
    3,841
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Why you need an oscilloscope

    Interesting,is using a oscilloscope self explanatory?



    REFS:
    eatank,mikescanlon,BoominBeast,Pistonsfan70,90accordman,bizflawless,Mazdakid,Boyle465,LiquidClen,dman4486,
    KickerSoItBump, SPY,1000101,infamous_e46


    Bought-Sold-Traded

  12. #9
    West's Avatar
    West is offline Banned



    Join Date
    Jan 2012
    Location
    Oliver Springs, TN
    Posts
    3,703
    Post Thanks / Like
    Mentioned
    73 Post(s)

    Re: Why you need an oscilloscope

    Quote Originally Posted by CJL View Post
    Interesting,is using a oscilloscope self explanatory?
    Yes does it come with everything I need to inspect signals?




  13. #10
    tat2bass's Avatar
    tat2bass is online now CarAudio.com Elite



    Join Date
    Aug 2011
    Location
    Cali
    Posts
    1,606
    Post Thanks / Like
    Mentioned
    17 Post(s)

    Re: Why you need an oscilloscope

    Have you thought about renting it out? Someone on here before was renting theirs out. Someone would deposit the amount on paypal that the item costs while using it and then once returned the owner would return it minus like 5-10 bucks. I'll need to use one when I get back and set my stuff up but dont feel like buying one just for the one time use.




  14. #11
    maylar's Avatar
    maylar is offline Electrical Weenie

    Threadstarter


    Join Date
    Jan 2002
    Location
    Connecticut
    Age
    62
    Posts
    3,439
    Post Thanks / Like
    Mentioned
    13 Post(s)

    Re: Why you need an oscilloscope

    Quote Originally Posted by CJL View Post
    Interesting,is using a oscilloscope self explanatory?
    Not really. You need to know what buttons to push to see what you want to measure. Especially when the functions are accessed through a scrolling menu instead of the more intuitive knobs on a full sized 'scope. The good news is that there are youtube videos showing how to use the common functions on this and other 'scopes.


    Quote Originally Posted by West View Post
    Yes does it come with everything I need to inspect signals?
    You get the scope and a probe. NO OWNERS MANUAL OR INSTRUCTIONS OF ANY KIND. Google is your friend with this thing. The operating system firmware is open source and some very bright people have made upgrades to it that add features and fixed bugs with the factory firmware.

    The main support forum is here: Seeedstudio Forum • Index page under a thread called "DSO firmware version 3.64 "



    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

  15. Thanks West thanked for this post
  16. #12
    BrownVanMan's Avatar
    BrownVanMan is offline CarAudio.com Elite



    Join Date
    May 2009
    Location
    Minneapolis MN
    Posts
    1,981
    Post Thanks / Like
    Mentioned
    8 Post(s)

    Re: Why you need an oscilloscope

    it has abuilt in test signal but you are still able to play your own through the HU right?




  17. #13
    akillj's Avatar
    akillj is offline Senior VIP Member



    Join Date
    Sep 2012
    Location
    CA
    Posts
    310
    Post Thanks / Like
    Mentioned
    2 Post(s)

    Re: Why you need an oscilloscope

    Would this be a better investment then a DD-1? Little new to car audio.




  18. #14
    West's Avatar
    West is offline Banned



    Join Date
    Jan 2012
    Location
    Oliver Springs, TN
    Posts
    3,703
    Post Thanks / Like
    Mentioned
    73 Post(s)

    Re: Why you need an oscilloscope

    Quote Originally Posted by akillj View Post
    Would this be a better investment then a DD-1? Little new to car audio.
    Personally I would rather be able to see the signal than trust a box with an idiot light.




  19. Likes n8skow liked this post
  20. #15
    gckless's Avatar
    gckless is offline CarAudio.com Veteran



    Join Date
    Aug 2011
    Location
    San Antonio
    Posts
    4,123
    Post Thanks / Like
    Mentioned
    28 Post(s)

    Re: Why you need an oscilloscope

    Quote Originally Posted by West View Post
    Personally I would rather be able to see the signal than trust a box with an idiot light.
    ^^^This, every time.




Closed Thread
Page 1 of 4 1 2 3 4 LastLast

Similar Threads

  1. Replies: 6
    Last Post: 11-20-2010, 07:38 PM
  2. Second Battery, dont you need an isolator?
    By silenkiller in forum Wiring, Electrical and Installation Help
    Replies: 8
    Last Post: 05-14-2008, 02:16 AM
  3. do you need an H.O. alternator
    By jaco in forum Wiring, Electrical and Installation Help
    Replies: 4
    Last Post: 05-12-2007, 12:11 AM
  4. How do you use an oscilloscope??
    By whtxblazer02 in forum General Discussion
    Replies: 8
    Last Post: 03-09-2006, 06:19 PM
  5. Do you need an amp kit for the CDA-9815???
    By quiimari in forum General Discussion
    Replies: 9
    Last Post: 04-13-2003, 10:51 PM

Posting Permissions

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