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. Hi Marcus thanks for response, If there is no automatic gain control then how does it is ensured that ADC doesn't saturate ? I mean what if there is a signal whose amplitude is greater that ADC's highest input level ? Won't it saturate the ADC ? Also what if the signal is too weak to span much of the ADC input voltage, then again we are not using all bits effectively. Guide please. Thanks, Bob >>-- >>Marcus Leech >>Principal Investigator >>Shirleys Bay Radio Astronomy Consortium >>http://www.sbrac.org
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