Measure BER using XBee

I 've seen people using XBee (S1 , 2+ units) to measure packet error rate (PER).

I would like to know if it is possible to measure the bit error rate (BER)?

Can it be done by using API? Or does it require a custom firmware?

Thanks anyway !

You can’t do it by any means I know of. Received packets are checked using the checksum, and discarded if the checksum test fails. There’s no way to discover what bits were received.

If you really, really want to do this you could try a direct support request to the excellent folks at Digi. If there is a way, it’s probably something that only the experts know about.