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XStream-PKG-R™ RS-232/485 RF Modem – Product Manual v5.x00

Cyclic Scanning. Each RF transmission consists of an RF Initializer and payload. The wake-up

initializer contains initialization information and all receiving modems must wake during the

wake-up initializer portion of data transmission in order to be synchronized with the transmitting

modem and receive the data.

Figure 3.7. Correct Configuration (LH > SM)

Length of the wake-up initializer exceeds the time interval of Cyclic Sleep. The receiver is guaranteed to detect

the wake-up initializer and receive the accompanying payload data.

Figure 3.8. Incorrect Configuration (LH < SM)

Length of wake-up initializer is shorter than the time interval of Cyclic Sleep. This configuration is vulnerable

to the receiver waking and missing the wake-up initializer (and therefore also the accompanying payload data).

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