- 您现在的位置：买卖IC网 > Sheet目录537 > XT09-MI (Digi International/Maxstream)MODULE RF 900MHZ 1W 115K W/MMCX
9XTend? ? OEM ? RF ? Module ?‐? Product ? Manual ? v2.x4x ? [2007.01.04]
Chapter ? 4 ?‐? RF ? Communication ? Modes
4.2. Basic Communications
Basic Communications are accomplished through two sub-types:
? Broadcast - By default, XTend RF Modules communicate through Broadcast communications
and within a peer-to-peer network topology. When any module transmits, all other modules
within range will receive the data and pass it directly to their host device.
? Addressed - If addressing parameters match are in order, received RF data is forwarded to the
DO (Data Out) buffer; otherwise, the RF data is discarded.
When using Basic Communications, any functions such as acknowledgements are handled at the
application layer by the OEM/integrator. The Broadcast Modes provide transparent communica-
tions, meaning that the RF link simply replaces a wired link.
4.2.1. Streaming Mode (Default)
Characteristics : Highest data throughput
Lowest latency and jitter
Reduced immunity to interference
Transmissions never acknowledged (ACK) by receiving module(s)
Required Parameter Values (TX module) : RR (Retries) = 0
Related Commands : Networking (DT, MK, MY), Serial Interfacing (PK, RB, RO, TT)
Recommended Use : Mode is most appropriate for data systems more sensitive to latency and/or
jitter than to occasional packet loss. For example: streaming audio or video.
Connection Sequence
Figure ? 4 ‐ 04. Streaming ? Mode ? State ? Diagram ? (TX ? Module)
? Events & processes in this mode are common to all of
the other RF Modes.
? When streaming data, RB and RO parameters are only
observed on the first packet.
After transmission begins, the transmission event will con-
tinue uninterrupted until the DI buffer is empty or the
streaming limit (TT parameter) is reached. As with the first
packet, the payload of each subsequent packet includes up
to the maximum packet size (PK parameter).
The TT parameter (streaming limit) is specified by the TX
(transmitting) module as the maximum number of bytes the
TX module can send in one transmission event. After the TT
parameter threshold is reached, the TX module will force a
random delay of 1 to RN delay slots (exactly 1 delay slot if
RN = 0).
Subsequent packets are sent without an RF initializer since
RX (receiving) modules remain synchronized with the TX
module for the duration of the transmission (from preceding
packet information). However, due to interference, some RX
modules may lose data (and synchronization to the TX mod-
ule), particularly during long transmission events.
Once the TX module has sent all pending data or has
reached the TT limit, the transmission event ends. The TX
module will not transmit again for exactly RN delay slots if
the local (i.e. TX module's) RN parameter is set to a non-
zero value. The RX module(s) will not transmit for a random
number of delay slots between 0 and (RN-1) if the local (i.e.
receiving module's) RN parameter is set to a non-zero
value. These delays are intended to lessen congestion fol-
lowing long bursts of packets from a single TX module, dur-
ing which several RX modules may have become ready to transmit.
? ? 2007 ? MaxStream, ? Inc.
????? 45
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
XT09-PKI-EA-NA
MODEM RF 900MHZ 1W ETHER INT
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
相关代理商/技术参数
XT09-MI-MESH
功能描述:射频模块 9XTend, 1W Trnsvr MMCX,115000bps,Mesh
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
XT09MINA
制造商:DIGI 功能描述:New
XT09-MI-NA
功能描述:射频模块 9XTend 1W transceiv encryption 9600 bps
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-MT
功能描述:射频模块 9XTend 1W transceiv onnector 115000 bps
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-PKC-U
功能描述:射频模块 9XTend 1W USB 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-PKC-UA
功能描述:射频模块 900Mhz XTend 1W UBS 256-bit AES Encryp
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-PKC-UA-NA
功能描述:射频模块 9XTend 1W USB 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-PKC-U-NA
功能描述:射频模块 9XTend 1W USB 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