Atom Feed - Twisted Pear Audio Support - Topic:12.5MHz ripple on trident 3.0 supplying XO - 20Twisted Pear Audio Support - Atom Feedurn:twistedpearaudio-com:AtomFeed:TwistedPearAudioSupport:Topic:12.5MHzrippleontrident3.0supplyingXO-20:1Copyright 2024 Twisted Pear Audio Support2024-03-29T06:06:37Zhttp://www.twistedpearaudio.com/forum/Images/YAFLogo.pngForum Adminhttp://www.twistedpearaudio.comfeedback@twistedpearaudio.comRuss Whitehttp://www.twistedpearaudio.com/forum/profile/9-Russ-WhiteRuss Whitehttp://www.twistedpearaudio.com/forum/profile/9-Russ-Whiteavr300http://www.twistedpearaudio.com/forum/profile/396-avr300igy137http://www.twistedpearaudio.com/forum/profile/25491-igy137avr300http://www.twistedpearaudio.com/forum/profile/396-avr300igy137http://www.twistedpearaudio.com/forum/profile/25491-igy137avr300http://www.twistedpearaudio.com/forum/profile/396-avr300igy137http://www.twistedpearaudio.com/forum/profile/25491-igy137YetAnotherForum.NETurn:twistedpearaudio-com:ftPosts:st1:meid23032:112.5MHz ripple on trident 3.0 supplying XO<table class="content postContainer_Alt" width="100%"><tr><td>Yu also have to watch for loops between the scope and the device under test. AC - transformer coupling can help there.</td></tr></table>2015-08-26T21:03:23-07:002015-08-26T21:03:23-07:00Russ White<table class="content postContainer_Alt" width="100%"><tr><td>Yu also have to watch for loops between the scope and the device under test. AC - transformer coupling can help there.</td></tr></table>urn:twistedpearaudio-com:ftPosts:st1:meid22850:112.5MHz ripple on trident 3.0 supplying XO<table class="content postContainer" width="100%"><tr><td>Sounds logical. You might be right.<br /><br />My experience is I can't measure anything without the spring. Environment is just too noisy.</td></tr></table>2015-07-24T14:12:42-07:002015-07-24T14:12:42-07:00avr300<table class="content postContainer" width="100%"><tr><td>Sounds logical. You might be right.<br /><br />My experience is I can't measure anything without the spring. Environment is just too noisy.</td></tr></table>urn:twistedpearaudio-com:ftPosts:st1:meid22849:112.5MHz ripple on trident 3.0 supplying XO<table class="content postContainer_Alt" width="100%"><tr><td>I'm not sure it'd make a difference; if it's some external noise picked up, I'd expect this to be present in the other tridents' measurements, and none of them showed this.</td></tr></table>2015-07-24T14:08:54-07:002015-07-24T14:08:54-07:00igy137<table class="content postContainer_Alt" width="100%"><tr><td>I'm not sure it'd make a difference; if it's some external noise picked up, I'd expect this to be present in the other tridents' measurements, and none of them showed this.</td></tr></table>urn:twistedpearaudio-com:ftPosts:st1:meid22848:112.5MHz ripple on trident 3.0 supplying XO<table class="content postContainer" width="100%"><tr><td>Try using the spring to see if it makes any difference.</td></tr></table>2015-07-24T14:01:57-07:002015-07-24T14:01:57-07:00avr300<table class="content postContainer" width="100%"><tr><td>Try using the spring to see if it makes any difference.</td></tr></table>urn:twistedpearaudio-com:ftPosts:st1:meid22847:112.5MHz ripple on trident 3.0 supplying XO<table class="content postContainer_Alt" width="100%"><tr><td>I used the standard tektronix probe of the scope (http://www.tek.com/datasheet/passive-probe/p6139b-%C2%B7-p5050b-0). I used the clip, not the spring. (Clip to the trident gnd, probe tip to triden out pin). I also tested the other tridents, they're clean with the same setup. (Except my avcc, which shows the ~260khz triangle wave noise issue, discussed elsewhere on this forum).</td></tr></table>2015-07-24T14:01:02-07:002015-07-24T14:01:02-07:00igy137<table class="content postContainer_Alt" width="100%"><tr><td>I used the standard tektronix probe of the scope (http://www.tek.com/datasheet/passive-probe/p6139b-%C2%B7-p5050b-0). I used the clip, not the spring. (Clip to the trident gnd, probe tip to triden out pin). I also tested the other tridents, they're clean with the same setup. (Except my avcc, which shows the ~260khz triangle wave noise issue, discussed elsewhere on this forum).</td></tr></table>urn:twistedpearaudio-com:ftPosts:st1:meid22846:112.5MHz ripple on trident 3.0 supplying XO<table class="content postContainer" width="100%"><tr><td>Hi Igy.<br /><br />When measuring are you using a grounding spring ?<br /><br />(like this <a target="_blank" rel="nofollow" href="http://www.cliftonlaboratories.com/userimages/Update202.jpg" title="http://www.cliftonlaboratories.com/userimages/Update202.jpg">grounding spring</a>)</td></tr></table>2015-07-24T14:13:15-07:002015-07-24T14:13:15-07:00avr300<table class="content postContainer" width="100%"><tr><td>Hi Igy.<br /><br />When measuring are you using a grounding spring ?<br /><br />(like this <a target="_blank" rel="nofollow" href="http://www.cliftonlaboratories.com/userimages/Update202.jpg" title="http://www.cliftonlaboratories.com/userimages/Update202.jpg">grounding spring</a>)</td></tr></table>urn:twistedpearaudio-com:ftPosts:st1:meid22845:112.5MHz ripple on trident 3.0 supplying XO<table class="content postContainer_Alt" width="100%"><tr><td>Hi,<br /><br />I was measuring my power supplies, and found that the trident output powering the XO has a 12.5MHz ripple on it's output (hopefully I read/calc it correctly). As this is 1/8 of the XO freq, I'm wondering it has anything to do with it. Is this normal, or should this be just as clear as the other tridents?<br /><br />Thanks,<br />igy</td></tr></table>2015-07-24T10:46:21-07:002015-07-24T10:46:21-07:00igy137<table class="content postContainer_Alt" width="100%"><tr><td>Hi,<br /><br />I was measuring my power supplies, and found that the trident output powering the XO has a 12.5MHz ripple on it's output (hopefully I read/calc it correctly). As this is 1/8 of the XO freq, I'm wondering it has anything to do with it. Is this normal, or should this be just as clear as the other tridents?<br /><br />Thanks,<br />igy</td></tr></table>