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Can one more control bit be added to AD9361 AGC table to control one more extLNA using other GPO pins?

Question asked by iiibbo on Mar 6, 2017
Latest reply on Mar 8, 2017 by sripad

In other words:


How can AGC table be extended to slave GPO3 and GPO2 control pins besides GPO0 and GPO1 pins used with a control bit in the table for extLNA of each RX1 and RX2, respectively to slave one more extLNA together with the given extLNA for each RX1 and RX2?


Datasheet References:  When using external LNAs, AD9361 can optionally slave GPO_0 and GPO_1 off the receive gain tables to control LNA gain on each of the receivers. 


Briefly, a bit in the gain table can be output of a GPO and used to control the gain of external LNA.


Reference: Gain table in conjunction with an AD9361 GPO controls the external LNA. A bit in the gain table drives GPO0 for RX1 and GPO1 for RX2. Setting this pin zero results in a low GPO output level while one results in a high GPO output level.