Timeline for Coax cables and input impedances
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 3 at 7:47 | comment | added | Santi Ospina | Thanks! I already accepted the answer wich I forgot to do | |
| Apr 3 at 7:46 | vote | accept | Santi Ospina | ||
| Apr 3 at 7:31 | comment | added | Andy aka | @SantiOspina you'll get more help and better answers this way. If we are done here, please take note of this: What should I do when someone answers my question. If you are still confused about something then leave a comment to request further clarification. | |
| Apr 3 at 7:29 | comment | added | Santi Ospina | Alright, thanks! I will open another question following up this one | |
| Apr 3 at 7:22 | comment | added | Andy aka | @SantiOspina my answer recommends you follow the instructions provided by the differential probe manufacturer and that means using a 1 Mohm input oscilloscope. Yes, the compensation trimmer. The delay is part of t-line theory and is too complex to explain in comments. | |
| Apr 3 at 7:11 | comment | added | Santi Ospina | 1. You mean probe compensation right? The thing is that the differential probe that I'm using doesn't have that option. Would you recommend to use a 1MOhm termination then? 2. I was more curious to know how you deducted so easily that the oscilation would take 10ns, why not 5ns o any other value? | |
| Apr 2 at 16:19 | comment | added | Andy aka | Your 2nd comment raises the whole subject of transmission lines and reflections. It's a book size subject and so, you should probably make a brand new post on this but, check to see if there are answers existing on this site that help you first. | |
| Apr 2 at 16:16 | comment | added | Andy aka | Using a 2 Mohm scope will likely mean an adjustment on the small trimmer capacitor on the differential probe to ensure that a square wave in looks like a square wave on the scope. | |
| Apr 2 at 16:07 | comment | added | Santi Ospina | And about the 10ns oscillation that you predict, Im having a hard time wraping my head around why is it like that, could you please ellaborate on that? I'm really curious | |
| Apr 2 at 16:06 | comment | added | Santi Ospina | Thanks for the fast and insightfull reply! Btw there'se something that I still dont get... Since the Diff. Probe data sheet suggest using a 1 MΩ oscilloscope Input Impedance, and my oscilloscope* only has a 2MΩ , should it be recomendable (in the ideal case that the oscillations that you mention bother me) to insert a 1MΩ termination ? * (yes haha, the oscilloscope that we use here is rare, its actually called HiAS 744 developed by HEFELEY. In our lab we test SPD) | |
| Apr 2 at 15:55 | history | edited | Andy aka | CC BY-SA 4.0 |
added 185 characters in body
|
| Apr 2 at 15:39 | history | answered | Andy aka | CC BY-SA 4.0 |