NI-Scope bug: range property don't give correct value with 5922 5900 combination

[Henrik_Volkers]

I already post this bug in another thread , but with another topic, but since no CAR is provided and the update to 2012 (NI-Scope 3.9.4) didn't fix it,  I bring it up here again.

When using NI-Scope with a 5922 and a 5900 preamp the vertical range property is not correct. I use this property to calculate and inform the operator about the the actual ratio of used range choosen by the driver and the actual input signal range.

A test-vi is attached and show the error also with simulated devices.  (The actual range should be 40V )

[HoussamK]

Hi

Why do you not use a differential measurement which allows for  40V peak-to-peak (+/- 20V)?

Is the problem that you do not have enough ports to conduct differential measurements instead of Common Mode measurements?

Simply configure for differential and connect the ground to the negative input terminal. As far as the 160V range showing up, that's definitely some sort of bug.

[HoussamK]

Hi,

If you look in the "detailed help" for the "NI-SCOPE Initialize With Options" VI you will see:

You can also use the option string to attach an accessory such as the NI 5900 to your digitizer session to allow the seamless use of the accessory:

Option String: DriverSetup = Accessory:Dev1

Refer to the example niScope EX External Amplifier for more information.

It could be that your formatting is slightly wrong (spaces in the string), could you test it and and try to match the string exactly (With spaces)?

[HoussamK]

I mean  🙂

                                              

[HoussamK]

Any updates? It's been a while and nothing have change....

[Henrik_Volkers]

---

@hsm78 wrote:

Hi

Why do you not use a differential measurement which allows for  40V peak-to-peak (+/- 20V)?

Is the problem that you do not have enough ports to conduct differential measurements instead of Common Mode measurements?

Simply configure for differential and connect the ground to the negative input terminal. As far as the 160V range showing up, that's definitely some sort of bug.

---

The input limit to GND for each single input of the 5900 is +-10V (actually 11V) , so every potential to that is bigger than that will drive the input buffer into its limits BTDT 😞

If you drive the inputs with 10V amplitude and 180° phase you have 40Vpp .. see link in my first post.

The main reason for this thread is, that I want a CAR for the range bug...

And no missspelling in the init with options 😉  Hey, I extra made a demo and explained how to reproduce that error even without having the cards....

[Henrik_Volkers]

Still would be happy about a NI confirmation and a CAR

[Nathan-P]

Thanks for the bug report.  I've filed a CAR to our R&D department for NI-SCOPE.  (CAR ID#: 376074)