XBee‐PRO®900HP/XBee‐PRO®XSCRFModules
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RF Packet
The RF packet is the sequence of data used for communicating information between Digi
Radios. An RF Packet consists of an RF Initializer and RF Data.
When streaming multiple RF packets, the RF Initializer is only sent in front of the first packet.
RF Initializer
An RF initializer is sent each time a new connection sequence begins. The RF initializer contains
channel information that notifies receiving modems of information such as the hopping pattern
used by the transmitting modem. The first transmission always sends an RF initializer.
An RF initializer can be of various lengths depending on the amount of time determined to be
required to prepare a receiving modem. For example, a wake-up initializer is a type of RF initial-
izer used to wake remote modems from Sleep Mode (Refer to the FH, LH, HT and SM Com-
mands for more information). The length of the wake-up initializer should be longer than the
length of time remote modems are in cyclic sleep.
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