[Discuss-gnuradio] Resolution of USRP N210 and N200

[Ting Wu]

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