LAUNCHXL-CC2640R2: Long range test

Part Number:LAUNCHXL-CC2640R2

Hi,

I tested the long range functionality using 2 CC2640r2 Launchpad using BLE5 simple broadcaster and central project (simplelink_cc2640r2_sdk_3_10_00_15).

Configs:

Tx Power: 5dBm

  .primPhy = GAP_ADV_PRIM_PHY_CODED_S2,                               
  .secPhy = GAP_ADV_SEC_PHY_CODED_S2,   

With This configuration and in General mode of advertising I can see the advertising data only till 250m.(with LOS).

So please let me know

1)Is there any other configuration do I need to do .

2)Is TI has any test report regarding the same?