5122 Vertical Range?

[RJM2]

Hi,

I'm reading in the specification manual that the 5122 has only a vertical voltage range of 0.2V (peak to peak) to 10V.  However, when using the NI Scope Soft Front Panel, I am able to choose (on the volts/div) 0.25mV, which translates into 2mV peak to peak (there are 8 divisions on the screen).  Is there any way that I can program my LabVIEW program to use a 2mV vertical range???

Thanks for any help,

Russ

[minh.tran@ni.com]

Good morning Russ,

Thanks for contacting National Instruments with your issue, we'll try our best to resolve it for you as quickly and efficiently as possible. 

While you can specify any vertical range you want with niScope Configure Vertical.vi, from the actual A/D converter perspective, if you want to utilize the full 14-bits of resolution available, then you can't go any lower than the specified 0.2 V.  The A/D is scalable only to the specified vertical ranges of  0.2, 0.4, 1, 2, 4 and 10 V whereby the entire 14-bits of resolution will be spanned across the entire voltage range. 

So in your circumstance, if you specify a vertical range of 0.002 V, you'll onlly be using 1% of the 14-bits, so as long as that accuracy is acceptable for your application you should be fine.

Best of luck with your project.

Sincerely,

Minh Tran

Applications Engineering

National Instruments