Re: [Discuss-gnuradio] AGC and Dynamic Range of ADC

[Marcus D. Leech]

On 09/23/2013 11:07 PM, bob wole wrote:

Can somebody please guide me on this ?

Bob

On Fri, Sep 20, 2013 at 4:44 PM, bob wole <address@hidden> wrote:

I have USRPN210 with WBX and RFX2400. Is there any AGC chip on N210 motherboard or WBX, RFX2400 before ADC to utilize the dynamic range of ADC ? if yes, which one? If not, then won't the varying input signal (for example signal from moving object)  to ADC affect the performance of ADC ?

Bob

The ADC on an N210 has over 80dB of dynamic range.  If that isn't enough, then your application can adjust the RF gain to taste.

Only a subset of applications actually benefit from the usual hardware AGC schemes, and such schemes are invariably application-specific, so there's
  no *automatic* gain control.  But your application can dynamically make gain adjustments as it goes.

-- 
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org