How get best performance from BlueNRG-X on scan mode?

[uilter]

Hi, 

I'm using the example "BLE_SensorDemo_Central" from SDK to design a PoC to scan iBeacons devices.

I can't figure out why the scan procedure is too slow. 

I have two iBeacon devices near by the BlueNRG-1. 

They are sending iBeacon messages in 3Hz, but the BlueNRG is not fast enough to get the packages.

What am I doing wrong?

I understood that the method "Master_DeviceDiscovery()" set the scan parameters, right? I couldn't find on documentation the min or max for scan interval or scan window.

What do I need to do to get best performance from BlueNRG-1 on scan mode? I don't need to connect, just get the iBeacon messages.

Thank you!