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Products => Test Equipment => Topic started by: javadesigner on March 09, 2021, 02:22:40 pm

Title: R&S RTB2004 - meaning of dotted lines above and below trigger line ?
Post by: javadesigner on March 09, 2021, 02:22:40 pm
This is a n00b question!

When I slide the trigger line (up or down) on the RTB2004, a dotted (or dashed if your prefer) line shows up above and below the trigger line. This happens while the solid trigger line is being dragged and then those dotted lines disappaer once the drag is finished.

I've read the scope manual entirely and I don't see this mentioned anywhere. I'm at a loss to figure out what these lines actually mean. Also, these dotted lines don't don't show up if I turn on "HF reject".  :-//  My threshold is set to 0 and hysteresis to small - not sure if that has any connection to these dotted lines (they don't seem to expand further when hysteresis is set to large).

[edit: attached a pic to show this][attachimg=1]
Title: Re: R&S RTB2004 - meaning of dotted lines above and below trigger line ?
Post by: PeDre on March 09, 2021, 04:02:44 pm
These are the values for Treshold and Hysteresis.
In the manual under Chapter 4.3.4 Treshold Settings and 5.4 Edge Trigger.

Peter
Title: Re: R&S RTB2004 - meaning of dotted lines above and below trigger line ?
Post by: javadesigner on March 09, 2021, 05:32:56 pm
These are the values for Treshold and Hysteresis.
In the manual under Chapter 4.3.4 Treshold Settings and 5.4 Edge Trigger.

Thanks - but I could not find anywhere in the manual where it says these dotted lines are threshold and hysteresis. What am i missing ?

https://www.rohde-schwarz.com/webhelp/RTB_HTML_UserManual_en/Content/e77b4782fd80431c.htm (https://www.rohde-schwarz.com/webhelp/RTB_HTML_UserManual_en/Content/e77b4782fd80431c.htm)

The manual says the solid line is the threshold level (as expected). How can the dotted line also be the threshold ? I'm confused. Are both dotted lines the hysteresis level only ?