Hi zephyr,

In case2, we also have tried -40dBm(2Mbps) and -60dBm(2Mbps) , and receive 0 bytes.

Thanks

Tommy

Hi zephyr,

[case 1]

RF equipment send some bytes to DUT with -50dBm 1Mbps , and DUT can receive 0x2E81 bytes

[case 2] RF equipment send some bytes to DUT with -50dBm 2Mbps , but DUT receive 0 bytes

In case2 , To receiver bytes successfully in 2Mbps , how can I change zephyr source code?

Could you give us some suggestions?

Thanks

Tommy

Hi Stephanos,

Thanks for your response.

I have following question:

1. By Default  , What data rate (1M or 2M bps) are set in zephyr code ?  if it is 2Mbps , How can I set it to 1Mbps?

PS: Our RF equipment only support in 1Mbps.

Thanks

Tommy

Hi,

I suppose you are performing RX sensitivity test.

> If RF equipment send a dbm above -86 (ex: -85 , -84 , -83 …..), the error message will disappear.

Assuming you are testing with BLE 2Mbps PHY, I think this behaviour is only to be expected given that the max. sensitivity is specified at -85 dBm at 2Mbps for nRF51824 (refer to the datasheet).

Stephanos

Adding Vinayak.

If this depends on the dBm setting it might be a bug actually. I’ll let Vinayak weigh in.

Carles

+ jimmy

Hi ,

Sorry , correction.

We have a product using nRF51824 with Zephyr v1.13.0.

Our DUT connect with RF equipment.

[Test sequence]

Step1: DUT enter Rx mode with HCI command.

Step2: RF equipment send 1500 bytes with -86dbm.

Step3: DUT end Rx mode

After then , DUT will show “tx time out “ error message.

PS:

1. If RF equipment send a dbm above -86 (ex: -85 , -84 , -83 …..), the error message will disappear.
2. We use Zephyr v1.13.0 and v1.14.0 , and the result is the same.

Could you give us some suggestions?

Thank You,

Tommy