WIT24
5
0 2.4GHz
Spread Spectrum
Wireless Industrial
Transceiver
Integration
*XLGH
©2015 by Murata Electronics N.A., Inc.
WIT2450 Integration Guide (2015/04/27)
Page 1 of 57
www.murata.com
Страница 1: ...WIT2450 2 4GHz Spread Spectrum Wireless Industrial Transceiver Integration XLGH 2015 by Murata Electronics N A Inc WIT2450 Integration Guide 2015 04 27 Page 1 of 57 www murata com...
Страница 2: ...sing this antenna is forbidden Notice to users installers using the following fixed antennas with Murata RF products Andrews 24dBi parabolic dish Andrews 18dBi parabolic dish Cushcraft 15dBi Yagi Mobi...
Страница 3: ...France When used in France the WIT2410 can only be operated with the France hopping pattern selected This is accomplished by setting the pe parameter to 1 Refer to European Union Settings in this man...
Страница 4: ...5 Co Existing with 802 11b Networks 18 2 3 6 European Union Settings 18 3 PROTOCOL MODES 19 3 1 1 Data Packet 21 3 1 3 Connect Packet 22 3 1 4 Disconnect Packet base only receive only 22 4 MODEM INTE...
Страница 5: ...s 52 9 1 3 RF Specifications 52 9 1 4 Mechanical Specifications 52 9 2 Serial Connector Pinouts 53 9 3 Approved Antennas 53 9 4 Technical Support 54 9 5 Reference Design 55 9 6 Mechanical Drawing WIT2...
Страница 6: ...ta up to 230400 bps An on board 1 KB buffer and an error correcting over the air protocol provide smooth data flow and simplify the task of integration with existing applications Multipath fading impe...
Страница 7: ...and intensity over time as reflections change due to motion of the radio or objects within its range At any given time multipath fades will typically occupy 1 2 of the 2 4 GHz band This means that fro...
Страница 8: ...e minimum required by the regulating agencies For this reason the ability of DS systems to overcome fading and in band jammers is relatively weak By contrast FH systems are capable of probing the enti...
Страница 9: ...ms generally feature greater coverage and channel utilization than comparable direct sequence systems Of course other implementation factors such as size cost power consumption and ease of implementat...
Страница 10: ...issions will be received and not discarded Registration also allows tracking of remotes entering and leaving the network The base station builds a table of serial numbers of registered remotes To impr...
Страница 11: ...on and any one of the remotes Remotes cannot communicate directly with each other 2 2 1 Point to Point In point to point mode unless data transmit delay or minimum data length have been set the base s...
Страница 12: ...host receives just data If the remote is not in transparent mode the remote host will receive the appropriate packet header as specified by the remote s protocol mode Refer to the section Protocol Mod...
Страница 13: ...the remotes of the size of the time slot All remote time slots are the same size that is determined by the number of remotes registered with the base station The slot size is a dynamic variable that c...
Страница 14: ...te will be able to send 12 bytes of data If the WIT2450 is using a protocol mode the packet overhead is stripped off including start and stop bits before transmission and does not need to be considere...
Страница 15: ...throughout the band in a pseudo random pattern If a message fails to get through on a particular channel the WIT2450 simply tries again on the next channel Even if two thirds of the band is unusable...
Страница 16: ...nce at startup default setting zc 2 Escape sequence available at any time The zc2 mode setting is useful if the user application has a need to change the modem settings on the fly In this mode the esc...
Страница 17: ...host it might be 115 199 This is similar to a situation where the transmitting radio is sent data at a higher baud rate than the baud rate at which data is received by the receiving host To compensate...
Страница 18: ...s of 2400 2450MHz To select the limited frequency band for operation in France at the configuration mode prompt enter pe6 CR Save this setting by typing m CR The limited frequency operation will take...
Страница 19: ...e that a packet is transmitted to the base without being broken up over multiple hops The data length value in the data packet becomes the effective minimum packet length and maximum packet length for...
Страница 20: ...ded packet types supported Data CONNECT DISCONNECT modes 03 08 reserved for future use mode 09 This mode sends the protocol mode 01 packets during transmit but receives data transparently mode 0A This...
Страница 21: ...an that will be discarded and not sent See Get Maximum Data Length for more details 3 1 1 Data Packet Modes 01 02 Base 1110 1001 00HH HHHH LLLL LLLL 0 208 bytes data Remote 1110 1001 0000 0000 LLLL LL...
Страница 22: ...gns the remote a handle value may or may not assign it a dedicated time slice depending on the user settings and notifies the user application of the new remote with a connect packet The network numbe...
Страница 23: ...eceive data until RTS is asserted 0v 1 Receive data RxD enabled 3 3v 0 Receive data RxD disabled 6 DTR Input Sleeps wakes radio transceiver In sleep mode all radio functions are disabled At wake up an...
Страница 24: ...EM module interfaced to an RS 232 transceiver RTS and DTR need to be pulled high on the transceiver side In the evaluation unit RTS and DTR are pulled high on the transceiver side so the evaluation un...
Страница 25: ...supply voltage to the WIT2450 falls below 2 7 volts Operation of the microprocessor at voltages below this voltage is unspecified and can result in corruption of the program memory When the radio is f...
Страница 26: ...nd the voltage level at 31 dBm is 1 25V which is the maximum output voltage as shown in the chart These values would correspond to 0FH and 60H when using the wr command in Section 5 2 Network Commands...
Страница 27: ...ich causes the modem to respond with the current parameter setting e g wn Each modem command must be followed by either a carriage return or a line feed 5 1 Serial Commands These commands affect the s...
Страница 28: ...base station to operate in a multipoint network Depending on the user application more or less acknowledgment may be desired by the application Remotes can operate in transparent mode even though the...
Страница 29: ...ceive Signal Strength wu 0 1 Set Point to Point Direct Mode 0 Multipoint mode default 1 Point to point direct mode Set Transceiver Mode Sets modem operation as either base station or remote Default is...
Страница 30: ...mW 18dBm and 250mW 24dBm measured at the RF connector Control of the transmit power is provided through this command Default is 63mW 18dBm Read Receive Signal Strength Indicator RSSI This command repo...
Страница 31: ...1 MHz Avoids 2429 3 2479 1 MHz A 2431 3 2456 3 MHz Avoids 2401 7 2429 3 MHz and 2458 8 2479 1 MHz ph 00 fe base only Set Hop Duration 90H default 10ms pk 00 d0 Set Minimum Data Length 01 default pl re...
Страница 32: ...7ms For best results do not specify a duration of less than 3 ms This value only needs to be set in the base which broadcasts the parameter to all remotes However link time can be reduced if this valu...
Страница 33: ...ode Default is 00H which causes transmission to occur without any delay When a host is sending a group of data that needs to be sent together setting this parameter will provide time for the group of...
Страница 34: ...middle byte zl Read factory serial number low byte zp 0 4 Set the duty cycle at which the modem will wake up to send and receive data Duty cycle equals 1 2N where the argument of the command equals N...
Страница 35: ...s 5 5 Memory Commands The WIT2450 allows the user to store a configuration in nonvolatile memory which is loaded during the initialization period every time the radio is powered up Note that changes t...
Страница 36: ...l list changed parameters whether or not they have been stored with the m command Note that issuing this command will cause the radio to lose link with the base and will cause all remotes to lose link...
Страница 37: ...Assignment Mode base only pw 00 2f Set Base Slot Size base only px 0 1 Set ARQ Mode Status Commands zb 0 1 Banner Display Disable zc 0 2 Set Escape Sequence Mode zh Read Factory Serial Number High Byt...
Страница 38: ...per s kit is shipped from the factory one HN 550 is set up as a base station and the other is set up as a remote The interface rate for both modems is set at 9600 bps The default setting for the netwo...
Страница 39: ...Software CD included in the developer s kit Install WinCOM by navigating to the Software Tools directory on the Manuals and Software CD and double click on wincom2 1 exe follow the installation wizard...
Страница 40: ...functionality in typical fashion The Options menu contains the selections Show Comm Errors which lists any errors encountered in the PC UART Check Comm Ports on Bootup tells WinCom to verify each avai...
Страница 41: ...ay Disable command zb0 The COM port and baud rate can be changed using the drop down menus on the bottom right All the available COM ports will be listed in the menu but will have OK or N A designated...
Страница 42: ...the parameters m is issued the new parameters will only be valid until power is cycled or DTR is toggled by pressing the F1 key twice New parameter values that have been issued are saved to non volat...
Страница 43: ...to the left side of the window but the character corresponding to 0xd value of the carriage return will be displayed Similarly if the Hex Mode box is checked all characters are displayed in hexadecima...
Страница 44: ...to another WIT2450 this allows you to see what you are typing F6 Toggles stream mode Causes WinCOM to transmit a repeating pattern of characters Useful for testing F8 Toggles binary mode Displays exte...
Страница 45: ...is no need to click Stop Clicking on the Transmit button a second time will have the string transmitted a second time The third allows for checking of available Comm Ports and is useful for refreshing...
Страница 46: ...ansmit window In the bottom window you will see the entire packet being built as the data is entered in the windows When all the data has been entered click on the Transmit button to send the data Win...
Страница 47: ...s 200 milliseconds asserts DTR waits 200 milliseconds sends the configuration mode escape sequence waits 200 milliseconds and then sends the m command to the radio What this script file does is set th...
Страница 48: ...with a bar showing loading progression Once the file has finished transmitting the Final Average Throughput and Bytes sent numbers will be displayed Finally the eighth tool is Save to File which launc...
Страница 49: ...l mode for each unit To access modem control mode use the F1 key to toggle DTR to 0 and back to 1 and then press the F3 key which sends the wit2400 escape sequence If you are not using COM24 simply tu...
Страница 50: ...ke sure that RTS is asserted to enable receive character flow In a point to point application if a remote is not receiving data check that the base s default handle is the same as the remote s In a mu...
Страница 51: ...s Sometimes this symptom is caused by an application that is explicitly dependent on the timing of the received data stream The nature of the packetized RF channel imposes a degree of unpredictability...
Страница 52: ...ed RF Power 24 dBm Line of site Range approx 6 10 of a mile w 2dB dipole Frequency Range 2401 2495MHz Number of Channels 95 US Receiver Sensitivity 92dBm 10 5 BER Channel Data Rate 460Kbps IF Adjacent...
Страница 53: ...EP are terminated for proper operation 9 3 Approved Antennas The WIT2450 is designed to ensure that no antenna other than the one fitted shall be used with the device The end user must permanently aff...
Страница 54: ...l Support For technical support call Murata at 678 684 2004 between the hours of 8 30AM and 5 30PM Eastern Time 2015 by Murata Electronics N A Inc WIT2450 Integration Guide 2015 04 27 Page 54 of 57 ww...
Страница 55: ...9 5 Reference Design 2015 by Murata Electronics N A Inc WIT2450 Integration Guide 2015 04 27 Page 55 of 57 www murata com...
Страница 56: ...9 6 Mechanical Drawing WIT2450 2015 by Murata Electronics N A Inc WIT2450 Integration Guide 2015 04 27 Page 56 of 57 www murata com...
Страница 57: ...all be brought against Seller more than twelve 12 months after the related cause of action has occurred Buyer has not relied and shall not rely on any oral representation regarding the goods sold here...
Страница 58: ...HMC C031 LoRa Node Kit US Sierra HL7588 4G KIT US WISE 4610 S672NA EC21AUFA MINIPCIE EC21EUGA MINIPCIE CS EASYSWITCH 25 EC21JFB MINIPCIE DL RFM95 915M DL RFM96 433M Ra 07H V1 1 Ra 07 Ra 01SH Ra 01S T...
