For Sectorial scan you need not to enter these parameters but for Linear(electronic) scan you should have to enter proper index point and stride values.
I initially thought of a reverse of that but actually If i m not wrong Index point is your element step & stride the total no of (I.P)steps to be proceeded.
If u have 16 no. of elements with 1 element active and u want to have a step of one element multiplexing up to last element then your index point should be one & Stride to be 15. In this case stride of 16 is not possible.
Similarly for 1 active element and multiplexing of 2 elements steps upto last element then your index point to be 2 & Stride to be 7.
let it try and respond
10:40 Feb-02-2012 Mark Nel , Applications Advisor, Technology Design Ltd., United Kingdom, Joined Jul 2005 39
Shahid is correct, IDX POINTS is the number of steps the aperture will make (each step has a different index point) and STRIDE is the amount of elements to skip (if any) between steps. You can email me directly if you have any other questions - Mark
Thanks for the info. Btw i am succeed in understanding the concept between index points and stride but what is the relation between Number of Active, Idx points and Stride.
For example i am using 32 elements, the max i can input would be Active: 2, Idx points: 1 and Stride 6. How does the Active Elements affect to the Index points and stride.
10:06 Feb-24-2012 Mark Nel , Applications Advisor, Technology Design Ltd., United Kingdom, Joined Jul 2005 39
Hi Gary, Lets take the example of a 64 element probe with a 32 element aperture(number of active), using an IDX Points setting of 1 (or 0 for pre version 19.00 software) then the aperture can move 32 times(64-32=32), but if you reduce the aperture to 16 elements then 48 steps can be made (64-16=48). If you keep the 16 elt aperture and change the STRIDE to 2 then the aperture will skip an element in every step so will therefore only make 32 steps. It is unlikely that you would use a higher number stride but of course it is possible, it should be noted that increasing the stride has advantages but also and a cost; the advantage is faster scanning and smaller file size, the cost is loss of resolution however this may be an acceptable loss if detection ability is proven.
17:05 Mar-06-2012 Carlos Su√°rez Consultant, ASNT NDT LEVEL III, Integrity & NDT Solutions, Colombia, Joined Mar 2010 9