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Upgrading to the Siglent SDS1104X-E versus my OWON SDS7102V - thoughts?

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tautech:

--- Quote from: MrW0lf on December 18, 2018, 08:23:56 am ---
--- Quote from: daveyk on December 18, 2018, 06:37:41 am ---You can not change the pulse width measurement reference levels from 50% to what you need (-10% in my case), so you have to use the vertical cursors to properly measure pulse width.

--- End quote ---

Use math channel to create virtual offset or apply physical DC offset to move zero level? Or it will "AC couple" anyway to pulse (in which case more complex modding of pulse on math channel might still help)?

--- End quote ---
For some background on what Dave is looking for see this thread.....a few posts in:
https://www.eevblog.com/forum/testgear/tektronix-tds3032-forgets-its-gpib-address-setting/

The T@L measurement for the Siglents is Trigger level to 50% level across a pulse.....a measurement that I don't see a use for, whereas a measurement at the same level definable by the user.......

Performa01:

--- Quote from: MrW0lf on December 18, 2018, 08:23:56 am ---
--- Quote from: daveyk on December 18, 2018, 06:37:41 am ---You can not change the pulse width measurement reference levels from 50% to what you need (-10% in my case), so you have to use the vertical cursors to properly measure pulse width.

--- End quote ---

Use math channel to create virtual offset or apply physical DC offset to move zero level? Or it will "AC couple" anyway to pulse (in which case more complex modding of pulse on math channel might still help)?

--- End quote ---
Automatic pulse width measurements use (Vtop + Vbase) / 2 as the 50% reference level, so any DC offset will just be ignored.

It is similar for pretty much all time measurements, where a certain reference level is used.


I support the request for user-definable reference levels, but this means a significant change in the UI, as up to now automatic measurements don't need/have any parameters.

Apart from pulse width, there are also duty, rise and fall and maybe even channel delay measurements which would be candidates for custom reference levels.

2N3055:
Some other scopes define lower, middle and upper threshold.  By default at 10%, 50%, and 90%. Some measurements use 10  lower and upper (rise time for instance) and some use middle point (like pulse width.) All 3 threshold are user settable. 

MrW0lf:

--- Quote from: Performa01 on December 18, 2018, 01:35:00 pm ---Automatic pulse width measurements use (Vtop + Vbase) / 2 as the 50% reference level, so any DC offset will just be ignored.
--- End quote ---

Not if fiddle with signal a little...

MartyMacGyver:
My new scope (and new SDG2042X signal generator) arrived today! now to begin tweaking them...

The scope should be straightforward... the firmware for the SDG2042X, though, seems to be MIA:

https://www.eevblog.com/forum/testgear/the-siglent-sdg2042x-thread/msg2066593/#msg2066593

Fingers crossed on that one...

Edit: SDG2042X is now an SDG2122X! It was a little more complicated but it's all good now as best I can tell. A nice holiday upgrade overall!

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