Re: [Discuss-gnuradio] Resolution of USRP N210 and N200

[Ben Hilburn]

Ting -

This question really isn't GNURadio related. If you resend it over the USRP-Users list, though, we will help explain things quickly!

http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

Cheers,

Ben

On Sat, Nov 2, 2013 at 12:22 AM, Ting Wu <address@hidden> wrote:

Hi,

 

Both of USRP N210 and N200 have 14 bit ADC, which means a range of +/-2e13=+/-8129.

However, as I tested a N210 with LFRX, I got values from -32704 ~ 30073, close to +/-2e15=32768.

Last year, I also tested a N200 with LFRX, I got values from -16357 ~ 16241, close to +/-2e14=16384.

The sampling rate was set to 4 MHz.

 

So why does the ADC has a real resolution higher than 14 bit, and are N210 and N200 the same?

I’m really new to the world of ADC, so some basics would be very helpful.

 

Thanks!

 

Wu

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