AnsweredAssumed Answered

When Shall we run Baseband DC offset calibration again?

Question asked by CDRFT Employee on Mar 20, 2016
Latest reply on Mar 21, 2016 by tlili

Hi, My ADI friends:


As we know there are LNA+Mixer+TIA+LPF in the RX chain;

And there are RX QEC / RFDC offseet / BBDC offset calibrations for RX channel.


My understanding for when to do BBDC cal /RFDC cal as below table:


My question is :

1. If just LMT gain changed & LFP gain not changes, We just need to do RFDC cal only&No need BBDC cal?

2. If LMT gain not changed & just LFP gain changes, We just need to do BBDC cal only&No need RFDC cal?

3. If both LMT gain & LPF gain changes, We just need to do both BBDC cal & RFDC cal together?