Lock the knob? huh? There are three red ones....one for each channel....a= nd the last one on the Time per division knob. How do I lock them? =20 Maybe that explains why the Channel knobs won't go to 10 ro 50 v/div......?= ? Man a book would be useful! I may end up hunting one of those down!!! I'll test out the .1ms when I get home and let ya know how it goes. Thanks again!!! Tim >>> rammerman@ADELPHIA.NET 12/24/03 07:57AM >>> Tim, The little knob in the center of the main horizontal sweep select is not used to calibrate at all. For the scope to be displaying according to its predefined calibration that knob has to be in its locked position. If you set the sweep to 0.1ms, lock the little knob, and make sure the 10x is off, then your 1KHz cal signal should be 10 divisions. If it is not, then there are two possibilities: 1: the 1KHz signal is not exactly 1KHz 2: the calibration is off on the scope #1 is the more likely. Bob Ammerman RAm Systems ----- Original Message ----- From: "Tim Hart" To: Sent: Wednesday, December 24, 2003 8:49 AM Subject: Re: [EE:] Tek 465 O'scope usage (was Are solid state relays TTL) Let me get this right....I counted 10 bigger lines....that gives me 100 cubes. The space between them is one division.....same for voltage. So If I have 1 kHz calibration signal is should be set to .1ms....then the entire screen....left to right would be 1 full ms...right? If it cycles once per Ms it should rise on one half of the screen and go low on the = other half. But this is not the case....I adjusted the signal width both ways at .1ms and it won't fill the screen no matter how much I adjust. I guess a better question would be....what settings to use while calibratin= g and what should it look like when it's correct. I'll have to try looking at the 4 MHZ clock....right now I'm using the internal clock on the 16F628....I just received a 4 MHZ crystal. Thanks again for all the help everyone!!! Tim >>> rammerman@COPELANDDATA.NET 12/23/03 03:26PM >>> >That part I might be missing is "Per Division". I'm not 100% sure what each division is. I have no book on > this one....it's learn as you play = :) The divisions are marked are by the horizontal and vertical lines on the screen. >The 10x mode is confusing....it samples the same....so is the signal any different? Just closer right? The 'scope does not sample. It is an analog device that works by using the input voltage to deflect the electron beam directly. The 10x mode simply means that the horizontal sweep is stretched out 10 times as wide, making everything 10 times wider on the screen. Bob Ammerman RAm Systems -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics=20 -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics