Hello! introduction & oscilloscope  - Page 1
Forum section: electronics / beginners

author: Novapar
author_rank: Newbie
timestamp: March 16, 2023, 11:32:52 pm
content: Hello everyone! i have been following dave channel for years and i read discussion here everyday on the forum and really enjoy it! This year I decided to make a big step forward. I finally decided to join electronic engineer program this summer and i cant wait! been waiting for the right moment to do this move for years.To start my journey i bough a 1998-1999 Oscilloscope to play with and learn the basics, i have already a little knowledge with multimeter since im a Heavy-Duty Equipment Mechanic but its limited.The used oscilloscope in question came with brand new probes and i tough it was the manufacturer original probes when you get it new... but it wasnt, it look like some cheap dollar store chinese probe... I then learned that the oscilloscope in question have readout rings around the input and sadly the probe that came with the scope dont have readout pins anyway... i learned this readout system is for attenuation correct?Question: i want to buy some brand new quality probes so do i absolutely need to get the original that came with the scope?second question: Can i get some non attenuation readout pin probe? and what can it affect? is it a big deal?Third and last : I really like the fluke oscilloscope probe they are easy to find and have the same specs as the original probe that came with my scope when it was brand new, Does fluke use different connector?Thats it for now i guess ill start with this

author: jonpaul
author_rank: Super Contributor
timestamp: March 17, 2023, 12:18:01 am
content: what is the Oscilloscope you have?Your application?see Tektronix Circuits Concept book Oscilloscope Probe Circuitshttps://www.w140.com/tekwiki/index.php/Concepts_Seriesbest forum is tekscopes2 @ groups.ioJon

author: Novapar
author_rank: Newbie
timestamp: March 17, 2023, 02:15:10 am
content: Hi jonpaul,Thanks for your reply and the link you provided is awesome!its a LeCroy Lt322I dunnot have a real application for it right now, its just to learn the basics.tho i have a couple broken old Pc motherboard from intel 6th gen with power delivery problem i might want to look atThanks! appreciate

author: jonpaul
author_rank: Super Contributor
timestamp: March 17, 2023, 03:03:49 am
content: Rebonjour Cher monsieur Nova par, BRAVO pour votre intérêt ! Bienvenue à le EEVBLOG !1/ we used Tektronix, Yokogawa and old Hameg scopes (first was Tektronix 545, 536 in 1967!)Our favorite analog scopes Tektronix 2465B, 2467B, 2236ADigital scopes Yokogawa DL7440, 1740.Old retired analog were Tektronix 465, 475, Hameg HM103 and HM203virtually all scopes have a standard input 1 MOhm resist with 10..22 pF,shunt C.2/ each manufacturer has different coding rings for,probes,I but only the vertical V/ div ledgens / readout is affected.3/ the Chinese probes are often inaccurate for compensation and transient response, and easily,damaged.4/ the best scope probe is,always a Tektronix, used in good,conditions on eBay can be $20..60.5/ probes attenuator spec, is X1, X10 i0or switchable x1/x106/ probe compensation capacité range must cover scope, eg a 14..22 pF probe is fine for most scopes 20..100 Mhz BW.But a wideband scope like 350..400..500 MHz may have,only 10 pF input C,thus the above,14..22 P probe comp will not work7/ To calibrate the probe, use the scope CAL Signal, usually a 1 kHz square wave.Get a 2..6 div display of 2..10 cycles, use a trimmer tool or small screwdriver in the probe compensation box, gently rotate a fraction of an turn till the squarewave CAL has,flat top, no tilt.8/ see the other Tektronix Circuits Concept books on how scopes circuits work and on how to use,a,scope for various measurements.9/ a cheap function generator $20..50 can give you a fine education in,scopes and waves.Bon SoiréeJonPS see my Popular Electronics Super Audio Sweeper article from 50 years ago!

author: jonpaul
author_rank: Super Contributor
timestamp: March 17, 2023, 03:10:14 am
content: inside the Audio Sweeper