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Creating Mask Waveform in DDS (like PWL)

Question asked by RUCKB on Mar 25, 2007
Latest reply on Apr 30, 2007 by RUCKB
Hi,

after importing some measured data (Oscilloscop trace) I need to mask some time intervalls from the original data.
Therefore I would like to create a mask waveform. E. g. I would like to have the mask waveform always 1, just from 10 to 20 and from 30 to 50ns I would like to have it 0.
Is have done it so far manually (by creating 20 if statements which could be nested), and I think there are solutions to do it by AEL, Simulation of a PWL, or HPVEE, but I thought this must be posssible in the DDS with just a single statemetn too.
So I created a variable Start_Mask=(10,30) and End_Mask(20,50) and tried create my waveorm by a single if statement:
Mask=if (indep(Mask_1) > Start_Mask AND indep(Mask_1) < End_Mask))then 0 else Line_1
where Line_1 was just a trace with Level 1.

This is working when just using a single part from Start_Mask and End_Mask (e. g. Start_Mask[0] ), and not even giving an error when using the equation mentioned above, but the result is only the original Line_1 ...

Any ideas how to solve the issue ?

thanks and regards

Hermann  

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