Why does it say that the nRF51822 has 1Mb/s and 2Mb/s data rates if it doesn't?

[westhouse]

Why does it say that the nRF51822 has 1Mb/s and 2Mb/s data rates if it doesn't?

Quote from devzone: "6 * 20 B* 1/0.0075 s = 16 kB/s = 128 kbps". And its only for S110, cause for S120 this is even less as I read.

[westhouse]

Thanks for answer. If assume that 1Mb/s is over-the-air rate (speed of wave propagation) and real application throughput is 0.128Mb/s (official BLE protocol support up to 0.27Mb/s of app throughput), then how can I use the 2Mb/s mode in ble nRF51822 (assume that 0.128Mb/s is from 1Mb/s)?

Best regards

[kaku]

It is not possible. RF-PHY layer is capable of transmitting data at 1MBps, but until reachs RF-PHY layer from application layer, some of the overhead of protocol is piled and encapsulated. So, application throughput dramatically decreases. Purely the speed of electromagnetic wave propagation at 2.4GHz on the air is very fast, the time would be able to ignore in such wireless short range.