Radio test channel setting

RE: Radio test channel setting

dev_electronic — Thu, 28 May 2020 13:00:17 GMT

Dear ketiljo, can you please explane it a little bit more? Why isn't the frequency the same? Why are the steps smaller?

In BLE there are 40 different frequencies lets say channels (0 to 39). Why is it possible with the radio test or DTM to select 81 frequencies (Channels from 0 to 80)?

Thanks a lot in advance.

RE: Radio test channel setting

kevin seo — Thu, 14 Nov 2019 07:50:42 GMT

Thank you for your answer!

RE: Radio test channel setting

ketiljo — Thu, 14 Nov 2019 07:49:18 GMT

It depends how you look at it. The BLE channel mapping goes from 0 to channel 39. The frequency isn't the same. BLE channel 17 is at 2440 MHz.

Now, if you use DTM (direct test mode), which is a Bluetooth specific test mode, it will use the BLE channel mapping. If you use the radio test example, it's a generic radio tool, it will use the frequency directly. Here, channel 40 is at 2440 MHz.