STEVAL-FKI868V1 does somebidy nows how the boards finds the offset? marco

[Mmila.9]

[Tesla DeLorean]

Perhaps something to ask an FAE

Sell sheets talk about automatic frequency offset compensation.

Likely by referencing a secondary timing source, or by looking at the frequency offset from the carrier in the IF stage with respect to the local clock.

Protocol between two node might also reflect deviation observation, ie if high or low compared to expected center of band.

[Mmila.9]

What is an FAE?

and how do i contact him?

Implementing this compensation in our projects would be very usefull !!

the two demo boards i have do this compensation . this way i can lower the channel space .i changed the xtal with a tcxo

i don't immagine how a board compensetes it self if they anyway run with a quartz !!

marco

[Tesla DeLorean]

FAE - Field Application Engineer

How do you normally buy parts? Go in via your sales contact, a distributor should have their own FAEs to support their clients, based on the margin they take.

For ST direct, presumably via your local sales office and the support staff working there.

On the site here there should be an "Online Support Request Form"

Not sure why two boards couldn't attempt to align themselves more tightly.

Going to depend a lot of the granularity of the PLL/VCO in getting to the ~868 MHz (or whatever exact value it is trying to mix in the down-converter), and the ability to pull that to correct for the offset of the local oscillator.

[Winfred LU]

The S2-LP has been calibrated at factory.

And frequency offset is stored in the on-board EEPROM.

The GUI gets the offset value from the EEPROM.