- 您现在的位置：买卖IC网 > Sheet目录537 > XT09-PKI-EA-NA (Digi International/Maxstream)MODEM RF 900MHZ 1W ETHER INT
9XTend ‐ PKG ‐ E? ? Ethernet ? RF ? Modem ? – ? Product ? Manual ? v2.x4x ? [2007.01.04]
5.2.3. Repeater Mode
Attributes:
Constraints:
Suggestions:
Low power consumption
Minimized interference
Each RF packet is tagged with a unique Packet ID (PID).
Each repeater will repeat a packet only once (tracked by the PID).
Increased latency and decreased throughput
(Latency and throughput is determined by number of hops, not by number of
repeaters. Multiple repeaters within range of source node count as one hop.)
All RF packets propagate to every modem in the network (filtering rules apply).
Packet destination addresses (DT) determine which packets are sent out serial
port and/or retransmitted.
Broadcast communications - each packet comes out every node exactly once.
Addressed communications - all modems see every packet. Only the modem
with a matching address will forward it to the DO buffer (UART IN).
Requires that each modem have a unique MY (Source Address) parameter.
System must introduce just one packet at a time to the network for transmission
(Maximum number of bytes is determined by the PK parameter).
Each hop (H) decreases network throughput by a factor of 1/(H+1). Additional
repeaters add network redundancy without decreasing throughput.
Insert a variable delay before repeating packets to avoid collisions
(based on RSSI).
Buffer any incoming serial data and delay response packet transmissions until
previous packet has cleared out of network.
For best results, use the RO and RB commands to ensure that the RF packets
align with the underlying protocol packets as the network can only accept one RF
packet at a time.
Required Parameter Values (TX modem): MD = 5 or 6, MY = unique value (can be accom-
plished by issuing the AM (Auto-set MY) and WR (Write) commands to all modems in the network)
Related Commands: Networking (MD, DT, MY, AM), Serial Interfacing (RN, PK, RO, RB)
Recommended Use: Use in networks where intermediary modems are needed to relay data to
modems beyond the transmission range of the base modem.
Theory of Operation
OEMs and integrators can extend the effective range and reliability of their data radio system by
forwarding traffic through one or more repeaters. Instead of using routing tables and path discov-
ery to establish dynamic paths through a network, the repeater system uses a sophisticated algo-
rithm to propagate each RF packet through the entire network.
The network supports RF packets up to 2048 bytes (when the RF data rate is set at 9600 bps (BR
= 0)). The repeater network can operate using broadcast or addressed communications for multi-
drop networks and works well in many systems with no special configuration.
When in Repeater Mode, the network repeats each message among all available modems exactly
one time. This mechanism eliminates the need for configuring specific routes.
Figure ? 5 ‐ 06. Repeater ? Network ? Topology
? ? 2007 ? MaxStream, ? Inc., ? Confidential ? & ? Proprietary ?‐? All ? Rights ? Reserved ?
????? 49
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
XT09-SI
MODULE RF 900MHZ 1W 115K W/RPSMA
XU-A11
X-STICK 2.4GHZ USB TO XBEE
XV-8000CB :3 50.3000KHZ+/-60DPS
AUTOMOTIVE GYRO SENSOR +/-60DPS
YB03WKW01-6B-JB
INDICATOR PB RECT WHT LED ILLUM
YGM1 C518
THERM PTC MINI-BEAD 3MM 180C
YQD120N0006
THERMISTOR PTC OCP 6 OHM 25C
Z4D-A01
PHOTO SENSOR 7.5MM REFLECT TYPE
ZALM-301-1C-B
RF TRANSCEIVER 100MW MMCX W/CONN
相关代理商/技术参数
XT09-PKI-E-NA
功能描述:射频模块 9XTend 1W Ethernet w/o accessories Intl
RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
XT09-PKI-R
功能描述:射频模块 9XTend 1W RS232/485 w/o accessories
RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
XT09-PKI-RA
功能描述:射频模块 900MHz - Xtend software setable
RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
XT09-PKI-RA-NA
功能描述:射频模块 9XTend 1W RS232/485 w/accessories no AES
RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
XT09-PKI-RDA
功能描述:射频模块 XTend-PKG 900 MHz IndRS-232class1/div2
RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
XT09-PKI-R-NA
功能描述:射频模块 9XTend 1W RS232/485 w/o accessories Intl
RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
XT09-PKI-R-NL
制造商:Digi International Inc 功能描述:MODEM RF 900MHZ 9600/11
XT09-PKT-R
功能描述:MODEM RF 900MHZ RS232/485 RoHS:是 类别:RF/IF 和 RFID >> RF 接收器、发射器及收发器的成品装置 系列:XTend™ 标准包装:5 系列:MultiModem® iCell 功能:收发器，HSPA，调制解调器 调制或协议:GPRS，GSM，EDGE 频率:850MHz，900MHz，1.8GHz，1.9GHz 应用:- 接口:RS-232，USB 灵敏度:- 功率 - 输出:- 数据传输率 - 最大:7.2 Mbps 特点:- 电源电压:9 V ~ 32 V，USB 其它名称:881-1125