760 MHz Data Transceiver Manual FreeWave Technologies 760 MHz Data Transceiver Version 1.0 FreeWave Technologies, Inc. 1880 South Flatiron Court Boulder, CO 80301 (303) 444-3862 (303) 786-9948 Fax www.FreeWave.com LUM0000XX Rev A Version 1.
760 Mhz Data Transceiver Users Manual SPREAD SPECTRUM WIRELESS DATA TRANSCEIVER USER MANUAL Copyright © 1995-2008 by FreeWave Technologies, Inc. All rights reserved. Published 2008. WARRANTY FreeWave Technologies warrants your FreeWave® Wireless Data Transceiver against defects in materials and manufacturing for a period of two years from the date of shipment. In the event of a Product failure due to materials or workmanship, FreeWave will, at its option, repair or replace the Product.
760 Mhz Data Transceiver Users Manual FCC NOTIFICATIONS This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
760 Mhz Data Transceiver Users Manual Table of Contents ABOUT FREEWAVE TRANSCEIVERS.................................................................................................................6 CHOOSING A LOCATION FOR THE TRANSCEIVERS....................................................................................6 CHOOSING POINT-TO-POINT OR POINT-TO-MULTIPOINT OPERATION ........................................................................7 QUICK START ON A POINT-TO-MULTIPOINT NETWORK ...........
760 Mhz Data Transceiver Users Manual OVERLAPPING MULTIPOINT NETWORKS ..................................................................................................................30 FACTORY DEFAULT SETTINGS.........................................................................................................................30 OPERATIONAL RS-422 AND RS-485 INFORMATION .................................................................................................
760 Mhz Data Transceiver Users Manual About FreeWave Transceivers FreeWave transceivers operate in virtually any environment where RS232 data communications occur. A pair of transceivers function as a 9-pin null modem cable. If the FreeWave transceivers are to be used in an application where a null modem cable is used, such as communication between two computers, then the FreeWave transceivers can be connected directly.
60 Mhz Data Transceiver Users Manual Choosing Point-to-Point or Point-to-MultiPoint Operation A Point-to-Point network is limited to one Master and one Slave transceiver. In a Point-to-MultiPoint network (also referred to as MultiPoint network) the transceiver, designated as a Master, is able to simultaneously communicate with numerous Slaves.
760 Mhz Data Transceiver Users Manual Quick Start on a Point-to-MultiPoint Network The following is a quick start guide for setting up two transceivers in Point-to-MultiPoint mode. This mode allows for a Master to communicate with several Slaves simultaneously. 1. Connect the transceiver to the serial port of a computer either through a serial cable or via the diagnostics cable. Make sure to connect the radio to a power source (typically, 9 to 30 VDC). 2. Open up a HyperTerminal session.
760 Mhz Data Transceiver Users Manual Quick Start on a Point-to-Point Network When purchased as a pair, the FreeWave® Wireless Data Transceivers are shipped from the factory preconfigured to operate in Point-to-Point applications. To establish communications between a pair of FreeWave Wireless Data Transceivers just received from the factory: 1. Connect the transceiver to the instrument with the RS232 cable and also attach power.
760 Mhz Data Transceiver Users Manual Setting up a Transceiver Operation Mode The Operation Mode option designates the method FreeWave transceivers use to communicate with each other. FreeWave transceivers operate in a Master to Slave configuration. Before the transceivers can operate together, they must be set up to properly communicate. In a Point-to-Point configuration, Master or Slave Mode may be used on either end of the communication link without performance degradation.
760 Mhz Data Transceiver Users Manual Point-to-Point Slave (1) This mode designates the transceiver as a Slave in Point-to-Point mode. The Slave communicates with any Master in its Call Book. When functioning as a Slave, the Entry to Call feature in the transceiver’s Call Book is not operational. The Call Book may be bypassed in the Slave by setting Slave Security to 1. See the Slave Security section later in this manual.
760 Mhz Data Transceiver Users Manual Baud Rate This setting is the communication rate between the transceiver and the instrument to which it is connected. It is important to note that this is independent of the baud rate for the other transceiver(s) in the network. For example, a pair of transceivers may be used in an application to send data from remote process instrumentation to an engineer's computer.
760 Mhz Data Transceiver Users Manual Baud Rate Description Actual Baud Rate (selections 0-9) The actual baud rate for the transceiver’s data port. Data, Parity There are six data word length and parity configurations available to be used with FreeWave transceivers. The default setting is 0 (8, N, 1) and is the most commonly used serial communications protocol. When Data, Parity are selected from the Baud Rate menu, a prompt to enter a value for Data, Parity displays.
760 Mhz Data Transceiver Users Manual Serial Interface In products for which the protocol of the data port is software selectable, use this menu to set the protocol of the data port. In the TTL RF board product this setting must be "0". Menu Protocol Additional Information 0 RS232 Also used for TTL transceivers. 1 RS422 Modbus RTU mode must be enabled. See above. 2 RS485 Modbus RTU mode must be enabled. See above. 3 DOT Special for the Department of Transportation.
760 Mhz Data Transceiver Users Manual Call Book The Call Book is required to be used in Point-to-Point networks. The instructions provided in this section are for Point-to-Point mode only. Using the Call Book offers both security and flexibility in determining how FreeWave transceivers communicate with each other. Three settings must be made for two FreeWave transceivers to communicate in Point-to-Point mode: 1.
760 Mhz Data Transceiver Users Manual Radio Transmission Characteristics The Edit Radio Transmission Characteristics option allows the user to modify several different parameters in the transceiver. Many of these parameters must be maintained throughout the network for proper functionality. Note: This menu is only for the sophisticated user who has a good understanding of the principles of radio data transmission.
760 Mhz Data Transceiver Users Manual Edit Radio Transmission Characteristics (0) FREQKEY The FreqKey parameter should always be set to operate in single channel mode. To set FreqKey for Single Channel, select option 0 “FreqKey”, then select option F for more options. Select option 1 for Single Channel, then select the appropriate Frequency Channel. SETTING XMIT AND RCV FREQUENCIES The 760MHz Data Transceiver operates by transmitting on one frequency and receiving on a second unique frequency.
760 Mhz Data Transceiver Users Manual The following table defines the Minimum packet size in bytes by way of charting the Min Packet Size setting versus the RF Data Rate setting. Using the default settings, the actual minimum packet size, in bytes, is x.
760 Mhz Data Transceiver Users Manual The following table defines the Maximum packet size in bytes by way of charting the Min Packet Size setting versus the Max Packet Size setting where the RF Data Rate is set to 2.
760 Mhz Data Transceiver Users Manual The following table defines the Maximum packet size in bytes by way of charting the Min Packet Size setting versus the Max Packet Size setting where the RF Data Rate is set to 4.
760 Mhz Data Transceiver Users Manual to Send LED. A solid red CTS LED indicates a strong signal; a blinking CTS LED indicates a weaker signal. (4) RF DATA RATE FreeWave transceivers have five settings for the RF Data Rate (1, 2, 3, 4, 5 ). RF Data Rate should not be confused with the serial port Baud Rate. Setting 2 should be used when the transceivers are close together and data throughput needs to be optimized.
760 Mhz Data Transceiver Users Manual The default setting of 0 disables this function, where as a setting of 1 enables RTS-CTS control. RTS-CTS setting 2 is described in detail in the application note #5437 DTR to CTS Line Alarm Feature. With an RTS to CTS setting of 1, the Master senses the RTS line prior to all scheduled packet transmissions. If the state has changed, the Master will then transmit a message to the Slave with the new status. This transmission will occur regardless of data being sent.
760 Mhz Data Transceiver Users Manual Current Draw More Less Setting Description 0 Lowpower, disabled 1 LEDs dimmed, transceiver remains awake, transceiver is listening to the Master’s transmissions on every slot, and transceiver’s data port is shut down if the RTS line is deasserted (low). In this case, the transceiver needs to be awakened before it will be able to send data to the Master.
760 Mhz Data Transceiver Users Manual Show Radio Statistics Radio Statistics in the Main Menu allows the user to view data transmission statistics gathered by the transceiver during the most recent session. This is valuable when the user needs to know the signal strength and noise levels of the link. Statistics are gathered during each data link and are reset when the next link begins. See display below.
760 Mhz Data Transceiver Users Manual provide approximately 100 KBaud of bandwidth with an RF Data Rate setting of 3 and approximately 150 KBaud of bandwidth with an RF Data Rate of 2. RADIO TEMPERATURE The Radio Temperature value is the current operating temperature of the transceiver in degrees Celsius. For proper operation, a FreeWave transceiver must be in the temperature range of -40° to +75° C. Some of the transceivers are only tested to 0° C. See transceiver specification papers for details.
760 Mhz Data Transceiver Users Manual MultiPoint Parameters When installing MultiPoint networks it is important to do some up front planning. Unlike Point-to-Point networks, a Point-to-MultiPoint network requires several parameters are set consistently on all transceivers in the network. This includes RF data rate, Min and Max Packet Size, and FreqKey. Note: If several independent MultiPoint networks are to be located in close proximity the planning becomes more critical.
760 Mhz Data Transceiver Users Manual times. Therefore, it is important to find the optimal mix between network robustness, throughput, and latency. In general, a setting of 2 to 3 will work well for most well designed networks. Note: The Master Packet Repeat may be set to 0 if the user software is capable of, or requires acknowledgment. In this case if a packet sent by the Master and not received by the Slave, the user software will control the retries as needed.
760 Mhz Data Transceiver Users Manual Without having the serial numbers in the Call Book, a Slave may establish communications with different Masters, though not at the same time. This is very useful in mobile MultiPoint applications. (8) MULTIMASTER SYNCH MultiMaster Synch is reserved for applications, in both Point-to-Point and MultiPoint modes, with concentrations of Master units where it is necessary to reduce interference between the Masters. Please contact FreeWave Technologies for more information.
760 Mhz Data Transceiver Users Manual (C) SUBNET ID Subnet ID is not to be used in the FreeWave LRS-760 Data Transceivers. (D) RADIO ID Option (D) allows a transceiver to be designated with an arbitrary, user selectable, 4 digit number which identifies the transceiver in diagnostics mode. (E) LOCAL ACCESS Local Access is not to be used at this time. (G) RADIO NAME Option (G) allows the user to set a unique 20 character Radio name. LUM0000XX Rev A Version 1.
760 Mhz Data Transceiver Users Manual Overlapping MultiPoint Networks Overlapping MultiPoint networks may be set up effectively with FreeWave transceivers when several key parameters are set correctly. Overlapping MultiPoint networks are defined as networks using different Masters which share or overlap in a specific geographic area. It may also include co-located transceivers configured into different networks.
760 Mhz Data Transceiver Users Manual MultiPoint Parameters Operation Mode Default Point to Point Slave 1 (1) MASTER PACKET REPEAT 2 Set Baud Rate Default (2) MAX SLAVE RETRY 9 Baud Rate 115200 (3) RETRY ODDS 9 (A) Data Parity 0 (4) DTR CONNECT 0 (B) Modbus RTU 0 (6) NETWORK ID 255 (C) RS232/485 0 (7) RESERVED - (D) Setup Port 3 (8) MULTI MASTER SYNC 0 (E) TurnOffDelay/OnDelay 0/0 (9) 1 PPS ENABLE DELAY 255 0 (B) DIAGNOSTICS 0 Radio Parameters Default (D) RADIO ID No
760 Mhz Data Transceiver Users Manual Additional Transceiver information This section contains additional important information about FreeWave transceivers. The following topics are included in this section: Operational RS422 and RS-485 Information RS232 Pin Assignments OEM Board Pin Assignments Operational RS-422 and RS-485 Information For both RS-422 and RS-485, the FreeWave transceiver can drive 32 standard unit loads and loads the bus with only 1/8 unit load.
760 Mhz Data Transceiver Users Manual RS-422 AND RS-485 FULL DUPLEX PIN-OUTS Function RX+ RXTX+ TXSignal Ground Bare Board Pin Number 7 9 5 10 4 or 6 DE-9 Pin Number 3 7 2 8 5 Bare Board Pin Number Short 5 and 7 Short 9 and 10 4 or 6 DE-9 Pin Number Short 2 and 3 Short 7 and 8 5 RS-485 HALF DUPLEX PIN-OUTS Function Wire to both pins for Bus + Wire to both pins for Bus Signal Ground RS232 Pin Assignments Pin Assignment Signal Definition 1 CD Carrier Detect Output Used to show an RF connection
760 Mhz Data Transceiver Users Manual RF Board Pinout The 760 MHZ Series transceivers are available in both TTL and RS232 versions. The TTL versions use reverse polarity from standard RS-232 at 0 to 5 Volt levels. All pin descriptions and pin numbering are the same as the RS232 version.
760 Mhz Data Transceiver Users Manual CHANNEL LISTS Channel# Freq 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 LUM0000XX Rev A 757 757.00625 757.0125 757.01875 757.025 757.03125 757.0375 757.04375 757.05 757.05625 757.0625 757.06875 757.075 757.08125 757.0875 757.09375 757.1 757.10625 757.1125 757.11875 757.125 757.13125 757.1375 757.14375 757.15 757.15625 757.1625 757.16875 757.175 757.18125 757.1875 757.19375 757.
760 Mhz Data Transceiver Users Manual Channel# 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 Freq 787 787.00625 787.0125 787.01875 787.025 787.03125 787.0375 787.04375 787.05 787.05625 787.0625 787.06875 787.075 787.08125 787.0875 787.09375 787.1 787.10625 787.1125 787.11875 787.125 787.13125 787.1375 787.14375 787.15 787.15625 787.1625 787.16875 787.175 787.18125 787.
