参数资料
型号: XC09-009PKTI-R
厂商: Digi International/Maxstream
文件页数: 14/39页
文件大小: 0K
描述: MODEM RF 900MHZ RS232/485 9600
标准包装: 1
系列: 9XCite OEM 模块
频率: 900MHz
数据传输率 - 最大: 9.6kbps
调制或协议: FHSS,FSK
功率 - 输出: 6dBm
灵敏度: -108dBm
电源电压: 2.85 V ~ 5.5 V
电流 - 接收: 45mA
电流 - 传输: 55mA
数据接口: 连接器,母型 DB-9
天线连接器: RP-SMA
工作温度: -40°C ~ 85°C
封装/外壳: 模块
9XCite ‐ PKG ‐ R? ? RS ‐ 232/485 ? RF ? Modem ? – ? Product ? Manual ? v2.1 ? [2007.01.04]
3.2.3. Receive Mode
If a modem detects RF transmitted data while operating in Idle Mode, it transitions into Receive
Mode to start receiving packets. Once a packet is received, it goes through the receiving-end of a
CRC (cyclic redundancy check) to ensure that the data was transmitted without error. If the CRC
data bits on the incoming packet are invalid, the packet is discarded. If the CRC is valid, the packet
is placed the DO Buffer. This process is shown in the figure below:
Figure ? 3 ‐ 05. Receive ? Mode ? Data ? Flow
The modem returns to Idle Mode after valid data is no longer detected or once an error is detected
in the received data. If serial data-to-transmit is stored in the DI buffer while the modem is giving
precedence to Receive Mode, the data will be transmitted after the modem finishes receiving data
and returns to Idle Mode.
? ? 2007 ? MaxStream, ? Inc.
????? 14
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