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參數資料

型號：	XIB-R
廠商：	Digi International/Maxstream
文件頁數：	25/36頁
文件大小：	826K
描述：	BOARD INTERFACE RS232/485
標準包裝：	1
附件類型：	接口板
適用于相關產品：	XStream 和 Xcite 收音機
其它名稱：	Q2231853

9XCite"燨EM燫F燤odule?燩roduct燤anual爒2.1燵2007.01.04]

2007燤axStream,營nc.

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LH (Wake-up Initializer Timer) Parameter

<Non-AT Settable Parameter: Sleep (Low Power)> LH Parameter adjusts the duration of time in

which the wake-up initializer is sent. When receiving modems are put into the Cyclic Sleep Mode,

they power-down after a period of inactivity (specified by ST (Time before Sleep) Parameter) and

will periodically awaken and listen for transmitted data. In order for the receiving modems to ini-

tialize with the transmitter, they must detect ~35ms of the wake-up initializer. LH Parameter must

be used whenever a receiver is operating in Cyclic Sleep Mode. This lengthens the wake-up initial-

izer to a specific amount of time (in x 100 ms). The long wake-up initializer must be longer than

the cyclic sleep time that is determined by SM (Sleep Mode) Command. If the wake-up initializer

time were less than the Cyclic Sleep interval, the connection would be at risk of missing the wake-

up initializer transmission. The following data and figures illustrate this behavior:

Parameter Range: 0 - 0xFF [x 100 ms]

# of bytes returned: 1

Default Parameter Value: 0x01 (0.1 second)

Related Parameters: HT (Time before Wake-up Initializer), SM (Sleep Mode), ST (Time before

Sleep)

Figure?01. Correct燙onfiguration?LH?燬M)

The length of the wake-up initializer exceeds the time interval of Cyclic Sleep. The receiver is guar-

anteed to detect the wake-up initializer and receive the accompanying payload data.

Figure?02. Incorrect燙onfiguration?LH?燬M)

The length of the wake-up initializer is shorter than the time interval of Cyclic Sleep. This configu-

ration is vulnerable to the receiver waking and missing the wake-up initializer (and therefore also

the accompanying payload data).

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