APC-220 data transfer working but.........

HI,

I successfully configured the APC-220 where data can be transferred from the Arduino to the PC. However even with a super simple program which serialy sends “RF is transmiting :)” when I view it on Serial Monitor most of the data transfered is correct however at a certain interval the sentence isn’t finished correctly! Please find attached a photo which explains better my problem.

Is there something I can do because the snapshot was taken at a baud rate of 2400 but when increased to 57600 only four sentences are displayed correctly :~

RFtesting.ino (1008 Bytes)

The data is overflow when baudrate is 57600bps.
Make sure that the average UART rate should NOT higher than 60 percent of the air rate.