What value do you have set for the threshold and what are the characteristics of your clock signal ?

Yes that is what my declaration statement is, I had missed it from the code above but have added it in. Strings are passed as ByVal in VB even if used for a return value, they need to be populated before passing with a string of sufficient size to take the return hence serialstring = " "

With one unit connected the following should work Declare Function ps4000EnumerateUnits Lib "ps4000.dll" (ByRef count As Short, ByVal serials As String, ByRef SerialLen As Short) As Integer Declare Function ps4000OpenUnitEx Lib "ps4000.dll" (ByRef handle As Short, ByVal serialno As String) As Intege...

Can you check this out

I have seen the crash with your code as supplied, although if you select V and set one channel on and the rest off the crash disappears for me. I will add an update when I have more information.

Take a look in the system folder of the SDK for instructions on the additional files required

Try the following ps2000_set_sig_gen_built_in (unitOpened.handle, offset, 1000000, // 1 volt (PS2000_WAVE_TYPE) waveform, (float)frequency, (float)frequency, 0, 0, PS2000_UPDOWN, 0);

I am not sure why the drivers don't work with VirtualBox, I have successfully used them with VMware, which would suggest that they are not happy with the VirtualBox USB implementation. 64bit drivers are not on the current development plan but I am continuing to raise it as something that will need d...

Can you post a copy of the unit info that is printed when your code runs, including the driver version.

Yes, please attach your code and we can fire it up and see what is happening.

Would it be possible to post your code here, or send it to support@picotech.com, so that we can take a look.

Can you try putting the new dll in the Debug or Release directory where your exe is created

File->StartupSettings->SaveStartupSettings should do the trick.

I will pass your comments on to the development team for consideration for a future release, it is not currently possible to fix this when zooming or scaling small signals at present

Take the current sdk and just drop in the dll from my previous post. If you are still getting errors after this let us know what they are.