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using AD9361 fastlock recall

Question asked by dzdz on Aug 17, 2016
Latest reply on Aug 22, 2016 by DragosB

Hi,

I'm quite new with AD9361 FSCOMM2 and I need to use the fastlock mode to accelerate my frequency shift.

When I shift in a previously stored profile (ad9361_fastlock_store() ) with ad9361_fastlock_recall() , the pll convergence is done in approximately 100 us after ad9361_fastlock_recall() calling, instead of 500  us with a classical rf_pll_set_rate  calling, so that's a good point.

 

The thing is that when I use ad9361_fastlock_recall(), I also must execute the all rf_pll_set_rate() sequence to make it works, and I don't understand why.

I thought in a first time that ad9361_fastlock_recall() achieves the all PLL reconfiguration as my profile exists in fastlock registers and I don't understand why I need to also call the normal sequence (rf_pll_set_rate ).

 

Could someone explain me the issue ?

 

Thanks

Dimitri

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