yubingz
Junior Member level 3
i need to design a dvb-s receiver.
but there have a problem about agc control.
most of the dvb-s tunner have 2 agc control point - rf agc and baseband agc.
ang before bb vga there should have a LPF.
then the power estimation of the signal of the ADC should not be include outband of LPF. so if i adjust the rfagc according to the result of power estimation, then LNA should saturate.
is that right? if it is, how to solve this problem?
thank you very much!
but there have a problem about agc control.
most of the dvb-s tunner have 2 agc control point - rf agc and baseband agc.
ang before bb vga there should have a LPF.
then the power estimation of the signal of the ADC should not be include outband of LPF. so if i adjust the rfagc according to the result of power estimation, then LNA should saturate.
is that right? if it is, how to solve this problem?
thank you very much!