problems with Xtream packet

i´m using a Xtream OEM RF module (firmware version 4.2B5).
I set the ATRO with zero, i thought that with this setup every byte received by the serial port would be transmited, in packets with one byte. But i put at the serial port of the receiver Xtream module an osciloscope and i saw that the this Xtream that is receiving the data in bigger packets. Probably the module is waiting more data to send together, instead of sending a lot of packets of one byte.

Anyone here knows why this is happening?

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Message was edited by: fordcf2000

Message was edited by: fordcf2000