I made a pulse oximeter product with nrf51822AC(base on SDK5.2.0 & S110 6.0.0), and implemented SIG GATT-based profile(PLXP+PLXS). Now we want to do BQB RF PHY testing to test the low energy phy layer of the 51822 which be integrated in pulse oximeter product when whole product runs normally. But this begs the question, though: How can the direct_test_mode example project in SDK and my product software program run together on the 51822 ?