we purchased 2 boards of the S2-LP development kit STEVAL-FKI868V1
They come with a mother board that hosts an ST microcontroller already programmed.
We were able to make many RF tests in 10 minutes.
To make the tests, there's no need to write a single line of software.
The software running on a PC allowed us to change all the RF parameters of the 2 board on the fly.
We made the following tests:
TEST 1 - Sensitivity test
Instrument 1: Agilent RF source - Output power -110 dBm - Carrier 868.15 MHz - FSK modulation - Data 01010101...
Instrument 2: Tektronix battery powered oscilloscope
Board: S2-LP programmed as a receiver - GPIO_1 clock_out - GPIO_2 data_out
We directly connected the Agilent RF source to the S2-LP receiver. No coax cable in the middle.
The frequency deviation of the Agilent RF source was 2.4 KHz.
The IF channel filter bandwith of the S2-LP receiver was 12 KHz
No FEC and no whitening on the S2-LP receiver.
At -110 dBm the scope showed that data and clock were perfectly synchronized.
At -113 dBm the scope showed that, sometimes, data and clock weren't perfectly synchronized.
Excellent. We are well impressed.
TEST 2 - Distance test
I'll update this post next week.
No one sponsored this post.
Just wanted to share these results.