attila

Hello @Holger Senn.
Take a look at the attached LabVIEW 2023 Q1 vi example, which uses the WaveForms SDK functions via Call Library Function Nodes.

 

 
List_Digilent_Devices.vi
Regards,
Fausto

Attila,
Great information!  This is much better than having to do a hardware loopback.  I didn't realize that specifying the same DIO in the logic analyzer and in the pattern generator that it made the connection internally to the Digital Discovery.  That's very nice and helpful.  I had also built up a "Y" connector to allow them all to be connected to each other and the target, but at 20 MHz the signal integrity was poor, so having the programmed connections on the Discovery is great.
Thanks!

Hi @Anthocyanina
To be coupled select 'copy from' for both channels, Channel 1 / Copy from: Channel2 and Channel 2 / Copy from: Channel1
This way, whichever you modify it will applied to the other channel.

 
For 'sweeping modulation' you could use a custom waveform or play more samples from file or for AD3, ADP3X50 AM/FM source can be a Scope input.
For AD3 the first/default device configuration provides 2048 modulation buffer. Select the 6th device configuration to have 8192 AM/FM buffer.

Hi Attila, thank you for the detailed responses. We now have several AD2 and will try AD3 with external clk. 

Hi @Anthocyanina
 

Hi @Xiaohu
The Scope/ Time/ Options/ Sampling/ Clock available with most of the devices (AD1,2,3...) is just a sampling condition which can be asynchronous to the ADC.
Real reference clock IO is available for AD3, ADP3X50

Hi @magnitudephase
Yes.

Hi @m72
With "Analog only" the number of samples and rate of digital view gets stuck with the first capture parameters.
I didn't notice this before. It is fixed for next version.
Thank you for the observation.

Thank you, Attila. 
The beta s/w certainly changes the oscilloscope results. The rise time now measures ~21 ns, regardless of the trigger level. Also, and the rise time plot is much more linear. The calculated bandwidth is now ~17 MHz. Note that I'm getting similar bandwidth results when I sweep thru frequencies from 10 MHz and 20 MHz. Bandwidth appears to be somewhere in the teens.
Thanks again for your help with this. 

Thank you very much for solving a major problem that has been troubling me.😄

Hi @bruce19
You can use Add Channel/Math/Filter, and/or Time/ Average or Filter channel with newer devices AD3, ADP3X50...
 

Hi @lokobob99
99% yes
The device buffers are larger, so it lets you capture and generate longer sequences.
The system monitoring analog-io indexing (temperature, device consumptions...) are different.
See the details in the latest version:
 
 

Hi @bruce19
You can use Add Channel/Math/Filter, and/or Time/ Average or Filter channel with newer devices AD3, ADP3X50...
 

Hi Atilla,
I kept banging away and I think I understand the UI now - it is different than other hardware methods that I am familiar with.  I now see how the prefill drop down fills data into the space specified in the previous window.  That was not intuitive to me and I didn't see any tutorials that described how they act.  Anyway, I'm on the road to being able to use the interface.  Thanks for your timely help!

Aha, so the limited depth is because that RAM is used by packet buffer when not running Linux. Makes sense.

Hi All, @Doc TB, @leonvs
For the 24 input only pins of the Digital Discovery, Digilent offers the High Speed Adapter and Logic Probes. This is a small PCB adapter which extends the number of GND pins to 24, one for each DIN. Each Logic probe is a set of twisted wires, (black for GND, red for DIN), with a 100ohm series resistor on the top of the red wire (for reducing reflections). This solution reduces crosstalk and enables high frequency signal acquisition.
https://digilent.com/shop/digital-discovery-high-speed-adapter-and-logic-probes/

Hi @m72
Yes, the oscilloscope offset shifts the signal so the filter input is also shifted, like -1V input offset makes +1V to be 0 input for the filter.

Thank you!

Hi @m72
 

Thank you very much Attila, much appreciated.

Hi @m72
Thank you for the observation. It will be fixed in the next version 3.21.18
I recommend using the individual calibrations which you need to perform.
To overcome this wizard bug, before the wizard press Reset/ Reset to zero.

Hi @attila,
Didn't notice that setting. Perhaps it should default to Rising?

(Great app, by the way!)

Hello!

WaveForms 3.21.17, AD3
When I tried to calibrate the AD3, the power supplies behaved strangely.
After calibration using the Wizard, the specified and measured voltages differed by 0.1 volt. The quality indicator switched between red and green.
Then I calibrated the power supplies individually and everything returned to normal.
With best regards, Mikhail.

Thank you so much

Yes