Bug 04.00 a very small Bug or Limitation ? Trigger Delay discontinuityWell I satisfied myself on this point.
In the displays below I show where and when the error occurs
Here are displays at different Trigger delay points
1) The Trigger delay is set to 0.00 nS and is correct
2) The Trigger delay is set to 1.00 nS and is correct
3) The Trigger delay is set to 1.01 nS and is
NOT correct
4) The Trigger delay is set to 1.02 nS and is
NOT correct
5) The Trigger delay is set to 1.03 nS and is correct
Now you can see that the display with the Trigger delay is set to 1.01 nS is the same as
the display with the Trigger delay is set to 0.00 nS
This error occurs near every 1 nSec increment
It is rare that one manual makes a delay adjustment to these settings and the resulting error is very small just 1 nSec. ( one sample time )
In order to test , I used SCPI commands to set the values accurately.
This is a small error and only visible on DS2202 and DS2302 models set on fast timebase.
Now I observed that this error only occurs in "AUTO" , when the memory depth is only 700Pts.
and when the memory depth is set higher the error does not occur.
I make the hypothesis that the program that processes the 700 sample pts thru the SineX/X function and then maps the result in to the display memory has a fault at specific points.
But I say again this trying to interpolate 700 1nSec points into 1400 (10pSec) setting positions can be tricky.
So if you are measuring down to 10pSec offsets, be sure to use the work around of more Memory depth.
A Programming curiosity!