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rstofer:
Great choices!  I have the DS1054Z and I'm looking at the Siglent SDS1204X-E for the additional bandwidth and more reponsive UI.  Besides, I can keep my Rigol connected to my analog computer and use the Siglent as my bench scope.

Near as I can tell, the waveform generator is set for 5 kHz, 1V Amplitude (2V P-P) 50% duty cycle
The resistor is 1k and the capacitor is 10 nF or 0.01 ufd.  Tau = 1*10^3 * 10*10^-9 = 10 us.  12 Tau = 120 us => Tau = 10 us so a 1k resistor and 10 nF capacitor.

ETA:

If we assume that the waveform only extends to 5 Tau and we note that the horizontal scale is 50 us/div times 2 divisions, we get 5 Tau = 100 us or Tau = 20 us.  It doesn't matter which resistor/capacitor pair we pick as long as Tau = RC = 20 us.  Pick R = 2k then 20 us / 2000 Ohms => C =  10 nF.  I don't want to use very small values of resistors because there is a current limit to the waveform generator and I don't want to break it.  2k and 10 nF seems good...

Remember that i(t) = C dV/dt so when dv/dt is high (perfectly sharp edge on square wave) the current is similarly high and is only limited by the resistor.  You can consider the capacitor as a short circuit at t = 0.  So, we have 2V / 2000 Ohms or 1 mA of current, maximum.  The reason for 2V is that the capacitor already has a charge of 1V when the square wave turns the input to 1V in the opposite direction.

The actual values don't matter.  All the equations are given so once a display is on the screen, we can verify the plot by calculating from the actual values.  Fun stuff!

I drew a sketch of the AD2 connections and I zipped up the workspace.  I don't know how well workspaces port.
ETA: I changed the resistor value in the .PDF
David Cutcher CEG:
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David Cutcher "certified Evil Genius"
Old Printer:

--- Quote from: rstofer on April 30, 2019, 08:29:49 pm ---Great choices!  I have the DS1054Z and I'm looking at the Siglent SDS1204X-E for the additional bandwidth and more reponsive UI.  Besides, I can keep my Rigol connected to my analog computer and use the Siglent as my bench scope.

Near as I can tell, the waveform generator is set for 5 kHz, 1V Amplitude (2V P-P) 50% duty cycle
The resistor is 1k and the capacitor is 10 nF or 0.01 ufd.  Tau = 1*10^3 * 10*10^-9 = 10 us.  12 Tau = 120 us => Tau = 10 us so a 1k resistor and 10 nF capacitor.

ETA:

If we assume that the waveform only extends to 5 Tau and we note that the horizontal scale is 50 us/div times 2 divisions, we get 5 Tau = 100 us or Tau = 20 us.  It doesn't matter which resistor/capacitor pair we pick as long as Tau = RC = 20 us.  Pick R = 2k then 20 us / 2000 Ohms => C =  10 nF.  I don't want to use very small values of resistors because there is a current limit to the waveform generator and I don't want to break it.  2k and 10 nF seems good...

Remember that i(t) = C dV/dt so when dv/dt is high (perfectly sharp edge on square wave) the current is similarly high and is only limited by the resistor.  You can consider the capacitor as a short circuit at t = 0.  So, we have 2V / 2000 Ohms or 1 mA of current, maximum.  The reason for 2V is that the capacitor already has a charge of 1V when the square wave turns the input to 1V in the opposite direction.

The actual values don't matter.  All the equations are given so once a display is on the screen, we can verify the plot by calculating from the actual values.  Fun stuff!

I drew a sketch of the AD2 connections and I zipped up the workspace.  I don't know how well workspaces port.
ETA: I changed the resistor value in the .PDF

--- End quote ---

I was able to open the file in WaveForms. The generator was not running but the scope appeared to be. It was late and I didn't have the energy to go further, but i will try to work my way through this experiment in the next few days. I am "retired" on Fridays :) - hey, it's a start :-+
rstofer:
Navigate to the Wavegen 1 tab, check 'Enable' and click on Run

Don't expect to see anything, the scale completely fills the plot and only the vertical edge in the middle is visible - barely visible.  You can change the scale to be less obtuse.

Select the "Gear" in the upper right corner of the chart, select 'Manual' in the drop-down box next to the title Scale:  Set the Voltage Range to 500 mv/div  You will now see the complete centered square wave as output by  Wavegen 1.  Then switch back to Scope1 for the real display of the experiment.

There's a fairly recent upgrade to Waveforms.   I have it so if my instructions don't work, maybe we are using different versions.

I've been retired for 15 years.  I'm pretty good at it!
Old Printer:

--- Quote from: rstofer on May 01, 2019, 04:53:42 pm ---Navigate to the Wavegen 1 tab, check 'Enable' and click on Run

Don't expect to see anything, the scale completely fills the plot and only the vertical edge in the middle is visible - barely visible.  You can change the scale to be less obtuse.

Select the "Gear" in the upper right corner of the chart, select 'Manual' in the drop-down box next to the title Scale:  Set the Voltage Range to 500 mv/div  You will now see the complete centered square wave as output by  Wavegen 1.  Then switch back to Scope1 for the real display of the experiment.

There's a fairly recent upgrade to Waveforms.   I have it so if my instructions don't work, maybe we are using different versions.

I've been retired for 15 years.  I'm pretty good at it!

--- End quote ---

OK, thanks, that all makes sense. Would not be the first time I was zoomed in too far.  I did notice they had released a major update, just don't recall If I installed it yet at home, will look tonight.

15 years huh! You must be really old, or was smart when you were young :)  I have been doing it since the first of the year and my boss still forgets every week. Last Thursday evening he said the usual "see ya in the am" to my reply of "remember I am Fridays Retired". He commented that he was still having trouble getting used to it every week, but that I seem to be adjusting fine. It is wonderful, and I really like my job, but like my Fridays better :)  My hats off to you.
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