FreeWave Technologies 218151431519 757-758MHz and 787-788MHz, 76kbps Over the Air Data Rate, Board Level, Licensed Band Radio, RS232 / RS485, 9-30 volts User Manual 760mhz

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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
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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. The Product must be returned to FreeWave upon receiving a Return Material Authorization
(RMA) for evaluation of Warranty Coverage.
In no event will FreeWave Technologies Inc., its suppliers, and its licensors be liable for any damages
arising from the use of or inability to use this Product. This includes business interruption, loss of
business information, or other loss which may arise from the use of this Product. Please be advised that
OEM customer’s warranty periods may vary.
Warranty Policy may not apply:
1. If Product repair, adjustments or parts replacements is required due to accident, neglect, unusual
physical, electrical or electromagnetic stress.
2. If Product is used outside of FreeWave specifications.
3. If Product has been modified, repaired or altered by Customer unless FreeWave specifically
authorized such alterations in each instance in writing. This includes the addition of conformal
coating.
[dupe of above]Special Rate Replacement Option
A special rate replacement option is offered to non-warranty returns or upgrades. The option to purchase
the replacement unit at this special rate is only valid for that RMA. The special replacement rate option
expires if not exercised within 30 days of final disposition of RMA.
RESTRICTED RIGHTS
Any product names mentioned in this manual may be trademarks, or registered trademarks of their
respective companies and are hereby acknowledged.
Information in this manual is subject to change without notice and is proprietary and confidential to
FreeWave Technologies, Inc.
This manual is for use by purchasers and other authorized users of the FreeWave® Wireless Data
Transceiver only.
No part of this manual may be reproduced or transmitted in any form or by any means, electronic or
mechanical, or for any purpose without the express written permission of FreeWave Technologies, Inc.
FreeWave’s Spread Spectrum Wireless Data Transceivers are designed and manufactured in the United
States of America.
Printed in the United States of America.
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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. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Operation of this equipment
in a residential area is likely to cause harmful interference in which case the user will be required to
correct the interference at his own expense.
CAUTION:
The LRS-760 series transceiver have maximum transmitted output power of 2W. It is
recommended that the transmit antenna be kept at least 37 cm away from nearby persons
to satisfy FCC RF exposure requirements.
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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 ..........................................................................8
POINT-TO-MULTIPOINT OPERATION LEDS. ...............................................................................................................8
QUICK START ON A POINT-TO-POINT NETWORK........................................................................................9
POINT-TO-POINT OPERATION LEDS ...........................................................................................................................9
SETTING UP A TRANSCEIVER ...........................................................................................................................10
OPERATION MODE....................................................................................................................................................10
BAUD RATE ..............................................................................................................................................................12
CALL BOOK ..............................................................................................................................................................15
RADIO TRANSMISSION CHARACTERISTICS ...............................................................................................................16
EDIT RADIO TRANSMISSION CHARACTERISTICS .......................................................................................................17
(0) FreqKey..........................................................................................................................................................17
Setting Xmit and Rcv Frequencies .......................................................................................................................17
(1) and (2) Max Packet Size and Min Packet Size ...............................................................................................17
(3) Xmit Rate........................................................................................................................................................20
(4) RF Data Rate .................................................................................................................................................21
(5)RF Xmit Power................................................................................................................................................21
(6) Slave Security.................................................................................................................................................21
(7) RTS to CTS.....................................................................................................................................................21
(8) Retry Time Out...............................................................................................................................................22
(9) Lowpower Mode.............................................................................................................................................22
(A) High Noise .....................................................................................................................................................23
(C) Remote LED ..................................................................................................................................................23
SHOW RADIO STATISTICS .........................................................................................................................................24
Number of Disconnects........................................................................................................................................24
Antenna Reflected Power.....................................................................................................................................24
Transmit Current (mA) ........................................................................................................................................24
Average Noise Level ............................................................................................................................................24
Average Signal Level ...........................................................................................................................................24
Overall Rcv Rate (%)...........................................................................................................................................24
Radio Temperature ..............................................................................................................................................25
MULTIPOINT PARAMETERS ......................................................................................................................................26
EDIT MULTIPOINT PARAMETERS ..............................................................................................................................26
(0) Number Repeaters..........................................................................................................................................26
(1) Master Packet Repeat ....................................................................................................................................26
(2) Max Slave Retry .............................................................................................................................................27
(3) Retry Odds .....................................................................................................................................................27
(4) DTR Connect..................................................................................................................................................27
(5) Repeater Frequency .......................................................................................................................................27
(6) Network ID.....................................................................................................................................................27
(8) MultiMaster Synch .........................................................................................................................................28
(9) 1 PPS Enable/Delay.......................................................................................................................................28
(A) Slave/Repeater ...............................................................................................................................................28
(B) Diagnostics ....................................................................................................................................................28
(C) Subnet ID.......................................................................................................................................................29
(D) Radio ID........................................................................................................................................................29
(E) Local Access ..................................................................................................................................................29
(G) Radio Name...................................................................................................................................................29
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OVERLAPPING MULTIPOINT NETWORKS ..................................................................................................................30
FACTORY DEFAULT SETTINGS.........................................................................................................................30
OPERATIONAL RS-422 AND RS-485 INFORMATION .................................................................................................32
RS-422 and RS-485 Full Duplex Pin-Outs ..........................................................................................................33
RS-485 Half Duplex Pin-Outs..............................................................................................................................33
RS232 PIN ASSIGNMENTS ........................................................................................................................................33
RF BOARD PINOUT ...................................................................................................................................................34
FREEWAVE TECHNICAL SUPPORT ............................................................................................................................34
Channel Lists .......................................................................................................................................................35
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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. If FreeWave transceivers are to be used to replace
a straight-through RS232 cable, then a null modem cable must be placed between the transceiver and
the DTE instrument to which it is connected.
Choosing a Location for the Transceivers
Placement of the FreeWave transceiver is likely to have a significant impact on its performance. The key
to the overall robustness of the radio link is the height of the antenna. In general, FreeWave units with a
higher antenna placement will have a better communication link. In practice, the transceiver should be
placed away from computers, telephones, answering machines and other similar equipment. The RS232
cable included with the transceiver usually provides ample distance for placement away from other
equipment. To improve the data link, FreeWave Technologies offers directional antennas with cable
lengths ranging from 3 to 200 feet. When using an external antenna, placement of that antenna is critical
to a solid data link. Other antennas in close proximity are a potential source of interference; use the Radio
Statistics to help identify potential problems. The Show Radio Statistics page is found in option 4 in the
Main Menu. An adjustment as little as 2 feet in antenna placement can resolve some noise problems. In
extreme cases, band pass filter may reduce the out-of-band noise.
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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. In its simplest form, a MultiPoint
network functions with the Master broadcasting its messages to all Slaves and the Slaves responding to
the Master when given data by the device connected to the data port.
It is important to note the differences between Point-to-Point and MultiPoint networks. In a Point-to-Point
network all packets are acknowledged, whether sent from the Master to the Slave or from the Slave to the
Master. In a MultiPoint network, outbound packets from the Master to Slaves are sent a set number of
times determined by the user. The receiving transceiver will accept the first packet received that passes
the 32 bit CRC. However, the packet is not acknowledged. On the return trip to the Master, all packets
sent by the Slave are acknowledged or retransmitted until they are acknowledged. Therefore, the return
link in a MultiPoint network is generally very robust.
Traditionally, a MultiPoint network is used in applications where data is collected from many instruments
and reported back to one central site. As such, the architecture of such a network is different from Pointto-Point applications. The number of radios in a MultiPoint network is influenced by the following
parameters:
1.
Size of the blocks of data. The longer the data blocks, the smaller the network capacity.
2.
Baud rate.
3.
The amount of contention between Slaves. Polled Slaves vs. timed Slaves.
For example, if the network will be polling Slaves once a day to retrieve sparse data, several hundred
Slaves could be configured to a single Master. However, if each Slave will be transmitting data at greater
levels, then fewer Slaves should be linked to the Master. The overall network will be closer to capacity
with fewer Slaves.
For examples and additional information on data communication links, see the section Examples
of Data Communication Links later in this document.
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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.

Use the following settings in connecting with HyperTerminal

Connect to COMx (where 'x' is the number of the com port being connected to)

Set data rate to 19,200, data bits - 8, Parity- none, Stop bits – 1, Flow control – none.
3.
Press the Setup button on the radio. If using the diagnostics cable, press Shift-U (capital U).

The three lights on the board should all turn green, indicating Setup mode.

The main menu will appear on the screen.
4.
Press 0 to get into the Operation Mode menu.

Press 2 to set the radio as a point to MultiPoint Master.

OR, Press 3 to set the radio as a point to MultiPoint Slave.

Press Esc to get back to Main menu.
5.
Press 1 in the main menu to change the Baud Rate.

The baud rate must be changed to match the baud rate of the device that the radio is to be attached to.

Press Esc to get back to Main menu.
6.
At the Main Menu, press 3.

Set FreqKey, Max Packet Size, Min Packet Size, RF Data rate identical on all radios in the network.
Changing these values may help to eliminate interference from other FreeWave networks.

Press Esc to get back to Main menu.
Note:
7.
At the Main Menu, press 5.

Set the Network ID value to any value between 1 and 4095, except 255.

Make sure this value is the same on every radio in the network.
Point-to-MultiPoint Operation LEDs.
Master
Condition
Slave
Carrier Detect
(CD)
Transmit
(TX)
Clear to
Send (CTS)
Carrier
Detect
(CD)
Transmit
(TX)
Clear to
Send
(CTS)
Powered, not linked
Solid red
bright
Solid red
dim
Off 
Solid red
bright
Off 
Blinking
red
Slave linked to Master,
no data
Solid red
bright
Solid red
dim
Off 
Solid
green
Off 
* Solid red
bright
Slave linked to Master,
Master sending data to
Slave
Solid red
bright
Solid red
dim
Off 
Solid
green
Off 
* Solid red
bright
Slave linked to Master,
Slave sending data to
Master
Solid green
RCV data
or Solid red
bright
Solid red
dim
Intermittent
flash
redo
Solid
green
Intermittent
flash
redo
* Solid red
bright
Master with diagnostics
program running
Solid red
bright
Solid red
dim
Intermittent
flash
redo
Solid
green
Intermittent
flash
redo
* Solid red
bright
* Clear to Send LED will be solid red with a solid link, as the link weakens the Clear to Send LED light on the Slave
will begin to flash.
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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. The
cable supplied with enclosed transceivers (except Waterproof) is a 9-pin male serial; professional
board level transceivers will need a separate programming cable (sold separately).
2.
Set the Modem mode in each transceiver. One should be set as a Point-to-Point Master (Mode
0) and the other set as a Point-to-Point Slave (Mode 1).
3.
Set the baud rate on each transceiver to match the baud rate of the instrument to which it is
attached. Please note, when setting the transceiver's baud rate, its RS232 data rate is set. The
baud rate does not have to be on the same setting for the two transceivers.
4.
Edit the Call Book. Enter the Slave serial number in the Master’s Call Book. Enter the Master’s
Serial number in the Slave’s Call Book, or disable Slave Security (in the Slave).
5.
Connect antennas to the transceiver. Any FreeWave transceiver may be operated without an
antenna for bench-top testing without concern for damaging the product. Noise potential may be
reduced on the bench by lowering the Xmit power.
6.
Shortly after both transceivers are plugged in, they should establish a communications link with
each other and the connection is complete. Using the table below, verify that the radios are
operating as expected.
Point-to-Point Operation LEDs
Master
Condition
Slave
Carrier
Detect
(CD)
Transmit
(TX)
Clear to
Send (CTS)
Carrier
Detect (CD)
Transmit
(TX)
Clear to
Send (CTS)
Powered, no link
Solid red
bright 
Solid red
bright
Solid red
bright
Solid red
bright
Off 
Blinking red
Linked, sending
sparse data
Solid
green
Intermittent
flash
redo
Intermittent
flash
redo
Solid
green
Intermittent
flash
redo
Intermittent
flash
redo
Master calling
Slave
Solid red
bright
Solid red
dim
Solid red
bright
Solid red
bright
Off 
Blinking red
Mode 6 - waiting
for ATD command
Solid red
bright
Off 
Blinking
red
Solid red
bright
Off 
Setup Mode
Solid
green
Solid
green
Solid green
Solid
green
Solid
green
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
Blinking red

Solid
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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. When setting up the transceiver, remember that a number of
parameters are controlled by the settings in the Master. Therefore, deploying the Master on the
communications end where it will be easier to access is advised, but not necessary.
Note: Operation Modes not described below are not to be used in the FreeWave 760 MHz Data
Transceiver.
Operation
Mode
Description
Point-to-Point
Master (0)
This mode designates the transceiver as the Master in Point-to-Point mode. The
Master may call any or all Slaves designated in its Call Book.
In Point-to-Point mode the Master determines the setting used for most of the
radio transmission characteristics, regardless of the settings in the Slave. The
settings not determined by the Master are: RF Xmit Power, Slave Security, Retry
Time Out, and the Hop Table settings.
A quick method of identifying a Master is to power the transceiver. Prior to
establishing a communication link with a Slave, all three of the Master’s LEDs
will be solid red.
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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.
Point–toMultiPoint
Master (2)
This mode designates the transceiver as a Master in MultiPoint mode. This
mode allows one Master transceiver to simultaneously be in communication with
numerous Slaves.
A Point-to-MultiPoint Master communicates only with other transceivers
designated as Point-to-MultiPoint Slaves.
Point-toMultiPoint
Slave (3)
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allows the Slave to communicate with a MultiPoint Master. The Slave may
communicate with its Master.
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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. In this application, the baud rate for the transceiver
on the instrumentation might be set to 9600, and the transceiver on the engineer’s computer might be set
to 57,600.
Set Baud Rate
1. Select the appropriate baud rate to match the attached device.
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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. The
following describes each option:
It is desirable to set the baud rate to the highest level supported by the device to
which it is connected. In certain circumstances, however, this may actually result
in slower data communications.
Menu
FlowControl
Data Bits Parity
None
Even
Odd
None
Even
Odd
Stop Bits
This menu specifies the hardware flow control for the Data port. The options for 0-3
are described below.
Menu
Modbus RTU
Setting
Port
Additional Information
None
Default - Uses software control (XON XOFF)
RTS
DTR
DOT
Support for Modbus RTU protocol is available. The default setting for Modbus
RTU is 0 (Not Enabled).
To enable the Modbus RTU mode:
1. In the Set Baud Rate menu enter (B) and then select 1
2. In the Set MultiPoint Parameters menu, set Master Packet Repeat to 3.
Note: When using the transceiver in Modbus RTU mode, the Master Packet
Repeat must be set to 3 regardless of whether the network is in Point-toPoint or MultiPoint mode. The Modbus RTU mode must be selected when
transceivers are configured in RS485 or RS422 mode.
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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
RS232
Also used for TTL transceivers.
RS422
Modbus RTU mode must be enabled. See above.
RS485
Modbus RTU mode must be enabled. See above.
DOT
Special for the Department of Transportation.
Note: When DOT mode is enabled, the TimeDelay settings operate the same as
in the RS485/422 mode.
Note: RS4xx mode must have Modbus RTU enabled, and TurnoffDelay set to at
least 4.
Setup Port
Note: DO NOT change this setting unless the correct programming cable is
available for the new setting.
This setting determines which port, Main or Diagnostics, is used to enter the Setup
Main Menu.
Menu
Port
Additional Information
Main Only
The terminal is connected to the Main Data Port.
Diagnostics Only
The terminal is connected to the Diagnostic Port.
Both Ports
The terminal may be connected to either port.
Setup mode is invoked by sending a "U" (capital) to the Diagnostics port or by
pressing/toggling the Set-up button/switch, if available. OEM boards may also
enter Setup when Pin 2 is grounded.
The Main Data Port is the RS232 port. The OEM modules use a 2-row, 2 mm
female connector. The diagnostic cable for this port (ASC2009DC) is available
from FreeWave.
TurnOn/OffDelay
TurnOnDelay- Sets the delay between when the line drivers are turned on and
when the data leaves the data port. This setting can be adjusted for a 1-9 mS
delay.
TurnOffDelay- This setting specifies the time after the end of transmission of a
character to the RS485 bus that the transceiver stops driving the bus and releases
the bus to other devices. The units are ¼ of a character with a range of 0-9. An
entry of 4 means a delay equivalent to the duration of a full character. Default is
zero delay.
For data rates of 1200 bits/S or slower, avoid setting the TurnoffDelay parameter
higher than 4. At those rates the functionality of the microprocessor changes so
that a TurnoffDelay of 5 will have the same effect as if set to 1, and a setting of 6
will have the same effect as 2, and so on.
Note: TurnOffDelay must be set to a value of at least 4 for RS4xx operation.
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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. The Master’s serial number must be listed in the Slave's Call Book or Slave Security is turned off
in the Slave.
2.
The Slave’s serial number must be listed in the Master's Call Book.
3.
The Master must be programmed to call the Slave.
The Call Book allows users to incorporate up to 10 FreeWave transceivers, and designate which Slave the
Master will call. To set the Entry to Call option, enter C at the prompt, followed by the menu number
corresponding to that Slave. To call any available Slave in the list, enter C then enter A to direct the Master
to Call All.
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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.
The settings for the Slave(s) not determined by the Master are RF Xmit Power, Slave Security, Retry
Time Out and Hop Table Size, Hop Table Version, and Hop Table Offset.
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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.
In order to program these channels, please refer to the Channel and Frequency lists at the end of this
document.
Select option 0 Edit Hop Table, and then select the appropriate Channel Number to edit. Enter the
appropriate Xmit channel number, from the Channel List, and press enter, and then enter the appropriate
Rcv channel number, from the Channel List.
Select option 1 For Single Channel, then select the appropriate Channel number to use the frequencies
just programmed.
(1) AND (2) MAX PACKET SIZE AND MIN PACKET SIZE
The Max and Min Packet Size settings and the RF Data Rate determine the number of bytes in the
packets. Throughput can be enhanced when packet sizes are optimized. In Point-to-Point mode, the Max
and Min Packet Settings will not have material impact on throughput unless 115.2 KBaud is desired.
However, this may have an impact on latency. For example, if small amounts of data are sent and large
packet sizes are selected, there would be a certain amount of time “wasted” between each packet.
The following 6 tables provide the information to determine optimum setting values.
The default settings for Max and Min packet size and RF Data Rate are 8, 9, and 3, respectively.
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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.
Minimum Packet Size Definition
Min
Setting
Min Packet Size
RF Data Rate = 1
Min Packet Size
RF Data Rate = 2
Min Packet Size
RF Data Rate = 3
Min Packet Size
RF Data Rate = 4
Min Packet Size
RF Data Rate = 5
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 1.
Using the default settings, the actual maximum packet size, in bytes, is x.
Maximum Packet Size Definition with RF Date Rate of 1
Max Setting
Min Setting
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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.
Maximum Packet Size Definition with RF Date Rate of 2
Max Setting
Min Setting
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 3.
Maximum Packet Size Definition with RF Date Rate of 3
Max Setting
Min Setting
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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.
Maximum Packet Size Definition with RF Date Rate of 4
Max Setting
Min Setting
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 5.
Maximum Packet Size Definition with RF Date Rate of 5
Max Setting
Min Setting
Referencing the default settings, the Master will transmit up to 172 bytes on every hop. If fewer than 172
bytes are transmitted, the balance is allocated to the Slave's transmission, plus the quantity in the Min
Packet Size Setting.
For example, if a Master transmits 100 bytes, the Slave will then have a total of 116 bytes available
(72(“leftover bytes”) + 44 (Min packet size))
(3) XMIT RATE
There are two settings for the Transmit Rate parameter. The setting for normal operation of the
transceiver is a Transmit Rate 1. Transmit Rate 0 is useful to qualitatively gauge signal strength in Point
to Point mode. When set to Transmit Rate 0, the transceivers will transmit back and forth continuously
regardless if they have any actual data. In Point-to-Point operation, Transmit Rate 0 should be used only
as a diagnostic tool and not for normal operation. The strength of the signal may be gauged by the Clear
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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. Setting 3 should be used when the transceivers are farther away and a solid data link is
preferred over data throughput.
Note:
In MultiPoint networks, the RF Data Rate must be set identically in all transceivers. Any
transceiver with an RF Data Rate different from the Master will not establish a link.
In Point to Point networks the Master’s settings take precedence over the Slave.
RF Data Rate Setting
Occupied Bandwidth
Modulation Level
50kHz
GFSK
25kHz
4-level GFSK
25kHz
GFSK
12.5kHz
4-level GFSK
12.5kHz
GFSK
Throughput
(5)RF XMIT POWER
The RF Xmit Power parameter allows the user to control the output transmit power up to two watts
(+33dBm).
(6) SLAVE SECURITY
Slave security is a feature which allows Slave transceivers to accept transmissions from a Master not
included in the Call Book. The default setting is 0 (Slave Security enabled) which means, only Masters in
the Slaves’ Call Book may link to that Slave.
Slave Security may be disabled (setting of 1) allowing any Master to call the Slave. Slave Security has no
effect in Point-to-MultiPoint networks where the Network ID is not set to 255.
Slave Security must be set to 1 when the unit is operating in Mode 6 Slave/Master switchable or a Pointto-Point network where the Slave may need to accept calls from more than 10 different Masters. When
Slave Security is set to 1, the transceiver will accept calls from any other FreeWave transceiver.
Additional network security measures may be taken to prevent unauthorized access, such as changing
default settings for FreqKey, Hop Table or Frequency Zones.
(7) RTS TO CTS
Menu selection RTS to CTS in the Radio Parameters menu provides the option of allowing the RTS line
on the Master transceiver to control the CTS line of the Slave. This pass-through control can be enabled
in both Point-to-Point and Point-to-MultiPoint. In MultiPoint networks, the Master RTS line will control all
Slaves’ CTS lines. When enabled, the CTS line ceases to function as flow control. It is not recommended
to enable this feature when operating at RS-232 speeds above 38.4kB.
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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. If data is ready to be sent, the
RTS status message will be sent in addition to the data. In Point-to-Point mode, the Master will continue
sending the new status message until it receives an acknowledgment from the Slave. In MultiPoint mode,
the Master will repeat the message the number of times equal to the Master Packet Repeat value in the
MultiPoint Parameters menu.
Master transmit times are completely asynchronous to the occurrence of any change of the RTS line; the
latency time from RTS to CTS is variable. The Max and Min Packet Size parameters in the Radio
Parameter menu determine this duration. Setting both parameters to their maximum value of 9 will
produce a maximum latency time of approximately 21 ms. At the minimum settings for Max and Min
Packet Size (0), the time will be approximately 5.9 ms. Please note that this latency can increase
significantly if packets are lost between the Master and Slave. In Point-to-MultiPoint mode, there is no
absolute guarantee that the state change will be communicated to all Slaves in the unlikely event that all
repeated packets from the Master do not get through to all Slaves.
Note:
If DTRConnect is enabled and set to 2, the RTS to CTS feature will not work.
Note:
If the DTRConnect is enabled and set to 1, RTS to CTS mode takes precedence over the
functionality of the CTS line on the Slave relating to the DTRConnect feature.
Note:
The RTS to CTS option is only available in RS232 mode.
(8) RETRY TIME OUT
The Retry Time Out parameter in a Slave sets the delay the unit will wait before dropping the connection
to a Master in MultiPoint mode. The factory default is set at the maximum of 255. The maximum setting
means that if 1 packet in 255 is sent successfully from the Master to the Slave, the link will be maintained.
The minimum setting is 8. This allows a Slave to drop a connection if less than 1 in 8 consecutive packets
is successfully received from the Master.
On the other hand, the function in the Master is effectively the same. With a setting of 255, the Master
will allow a Slave to stay connected as long as 1 packet in 255 is successfully received at the Master.
The Retry Time Out parameter is useful when a MultiPoint network has a roving Master or Slave(s). As
the link gets weaker, a lower setting will allow a poor link to break in search of a stronger one.
Note:
Setting Retry Time Out to 20 is recommended in areas where several FreeWave networks exist.
This setting will allow Slaves to drop the connection if the link becomes too weak, while at the
same time prevent errant disconnects due to interference from neighboring networks.
While intended primarily for MultiPoint networks, the Retry Time Out parameter may also be modified in
Point-to-Point networks. However, the value in Point-to-Point mode should not be set to less than 151.
(9) LOWPOWER MODE
The Lowpower Mode feature allows a MultiPoint Slave to consume less power. This is achieved primarily
by dimming the transceiver's LEDs. When set to 2 through 31, the transceiver will sleep between slots.
For example, at a setting of 2 the transceiver sleeps 1 out of 2 slots; at a setting of 3 the transceiver
sleeps 2 out of 3 slots, and so on.
The following table shows the changes at different Lowpower Mode settings. The actual current draw
depends on many factors. The table below gives only a qualitative indication of supply current savings. A
low number reduces latency and a high number reduces current consumption.
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Current Draw
More
Less
Setting
Description
Lowpower, disabled
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.
LEDs dimmed, transceiver sleeps every other slot
LEDs dimmed, transceiver sleeps 2 of 3 slots
4-31
LEDs dimmed, transceiver sleeps the number of slots corresponding to
the setting. For example, with a setting of 31 the transceiver sleeps 30 of
31 slots.
IMPORTANT NOTES
1.
Lowpower Mode is used only in MultiPoint Slaves using serial protocol. Power savings occur only
when the Slave is linked. There are no power savings when the Slave is transmitting data.
Lowpower Mode is of little value when a Slave has a constant, high throughput. MCUSpeed must
be set to ‘0’ and RF Data Rate must be set to ‘3’ for Lowpower Mode to operate properly.
2.
To communicate to an RS232 port of a transceiver that is in Lowpower Mode, the RTS line must
be held high to wake it up. The transceiver will wake up within approximately 20 milliseconds of
when RTS goes high.
3.
If the RTS line on the Slave is held high, the transceiver will remain in normal operation
regardless of the Lowpower Mode setting. Once RTS is dropped the transceiver reverts to the
Lowpower Mode.
If the transceiver has the DTRConnect option set to 1 or 2 and if the Lowpower Mode enabled (set to 131), the RTS line on the transceiver must be asserted for the ‘DTRConnect’ feature to operate properly.
(A) HIGH NOISE
The High Noise Option is useful in determining if out of band interference is affecting a radio link. A
setting of 1 will provide a reduction of gain in the front end circuit thereby decreasing the affect of any out
of band noise. The results will be seen as a lower signal value and a much lower noise value (as found in
Radio Statistics or Diagnostics). If the noise is not reduced by a greater amount than the signal, the
interference is most likely an in band issue.
When a noise problem is shown to be helped by way of the High Noise option, chances are that the noise
may be further squelched by use of a band pass filter available for sale from FreeWave Technologies.
(C) REMOTE LED
This setting enables the user to connect Remote LED’s through the diagnostics port.
Setting
Description
Notes
Board LED’s
Default. Only on board LEDs are enabled.
Board and Remote LED’s
Onboard LED’s are enabled as well as
Remote LED’s through the Diagnostic port.
On board LED’s are disabled. Remote LED’s
are enabled through the Diagnostic port.
Note: When using Remote LED’s the center (TX) LED will not turn Green when in Setup mode. This line
is not pinned out.
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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.
NUMBER OF DISCONNECTS
Any time the link between the Master and the Slave is broken and the radios lose Carrier Detect, it is
recorded in the Number of Disconnects value. The value indicates the total number of disconnects that
have occurred from the time the transceiver is powered on until the radio is put into Setup mode. Under
ideal operating conditions, the number of disconnects should be 0. One or more disconnects may indicate
a weak link, the presence of severe interference problems or loss of power to any of the radios in the link.
ANTENNA REFLECTED POWER
This is a measurement of the transmitted power that is reflected back into the transceiver from
mismatched antennas or cables, or loose connections between the transceiver and antenna. A reading
of 0-5 is good; 5-30 is acceptable; 30+ indicates that the connections should be inspected for loose
connections and cable quality.
TRANSMIT CURRENT (MA)
This measures the current draw of the transmitter in milliamps. Refer to Transceiver specs for typical
values.
AVERAGE NOISE LEVEL
The average noise level indicates the level of background noise and interference at this transceiver. The
number is an average of the noise levels measured at each frequency in the transceiver’s frequency hop
table. The individual measurement values at each frequency hop channel are shown in the frequency
table. Pressing the Enter key when the Radio Statistics menu is displayed, accesses the frequency table.
Ideally, noise levels should be below 70 J units and the difference between the average signal level and
average noise level should be 26 or more. Noise levels significantly higher than this are an indication of a
high level of interference that may degrade the performance of the link. High noise levels can often be
mitigated with band pass filters, antenna placement or antenna polarization.
AVERAGE SIGNAL LEVEL
The average signal level indicates the level of received signal at this transceiver. For each of these, the
signal source is the transceiver that transmits to it. The number is an average of the received signal levels
measured at each frequency in the transceiver's frequency hop table. The individual measurement values
at each frequency hop channel are shown in the frequency table. Pressing the Enter key when the Radio
Statistics menu is displayed accesses the frequency table. For a reliable link, the margin should be at
least 26 J units. Low Average Signal Levels can often be corrected with higher gain antennas and better
antenna placement.
Note:
Please consult the install manual for antenna and FCC requirements.
OVERALL RCV RATE (%)
The Overall Receive Rate measures the percentage of data packets that were successfully transmitted
from the Master to the Slave on the first attempt. A number of 75 or higher indicates a robust link that will
provide very good performance even at high data transmission rates. A number of 15 or lower indicates a
weak or marginal link that will provide lower data throughput. An Overall Receive Rate of 100% will
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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.
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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. In such cases, it becomes very important to include as much frequency
and time diversity as possible through use of different FreqKey, Min and Max Packet Size, and
Hop Table settings. In some instances the use of the MultiMaster Synch option may be required.
Edit MultiPoint Parameters
Selecting (5) Edit MultiPoint Parameters from the main menu displays the following window:
(0) NUMBER REPEATERS
Repeaters are not available in the FreeWave LRS-760 Data Transceivers.
(1) MASTER PACKET REPEAT
In a Point-to-MultiPoint network, Slaves do not acknowledge transmissions from the Master. If Slaves did
acknowledge all data transmissions, in a large network, the Master would soon become overwhelmed
with acknowledgments from the Slaves. Without acknowledgements, 100% confidence every Slave has
received every packet cannot be met. To address this issue, the user may modify the Master Packet
Repeat setting, assigning a value between 0 (the packet is transmitted once) to 9 (the packet is
transmitted 10 times). For networks with solid RF links, this parameter should be set to a low value such
as 1 or 2. If a network has some weak or marginal links it should be set with higher values. If a Slave
receives a good packet from a Master more than once it will discard the repeated packets
Increasing the Master Packet Repeat setting will increase the probability of a packet getting through, but
will also increase latency in the network because each packet from the Master is being sent multiple
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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.
(2) MAX SLAVE RETRY
The Max Slave Retry setting defines how many times (0 to 9) the Slave will attempt to retransmit a packet
to the Master before beginning to use a back-off algorithm (defined by the Retry Odds setting). Slave
retries will stop when an acknowledgement is received from the Master.
(3) RETRY ODDS
While packets transmitted from the Master to the Slaves in a MultiPoint network are not acknowledged,
packets transmitted from Slaves to the Master are. It is possible, that more than one Slave will attempt to
transmit to the Master at the same time. Therefore, it is important that a protocol exists to resolve
contention for the Master between Slaves. This is addressed through parameters (2) Max Slave Retry
and (3) Retry Odds. Once the Slave has unsuccessfully attempted to transmit the packet the number of
times specified in Max Slave Retry, it will attempt to transmit to the Master on a random basis. The Retry
Odds parameter determines the probability that the Slave will attempt to retransmit the packet to the
Master; a low setting will assign low odds to the Slave attempting to transmit. Conversely, a high setting
will assign higher odds. An example of how this parameter might be used would be when considering two
different Slaves in a MultiPoint network, one with a strong RF link and the other with a weak RF link to the
Master. It may be desirable to assign higher Retry Odds to the Slave with the weaker link to give it a
better chance of competing with the closer Slave(s) for the Master's attention.
When Retry Odds = 0, after the Slave has exhausted the number of retries set in the Max Slave Retry
parameter and still not gained the Master’s attention, the Slave’s data buffer will be purged.
(4) DTR CONNECT
With the setting of 0 in the Slave, the transceiver will transmit when RS232 data is received. A setting of
1 will form a Point-to-Point link with the Master when the DTR line is high. With a setting of 2, the
transceiver will transmit in bursts. This mode is valuable when a network has many low data rate devices
and it is desirable to increase overall network capacity.
Note:
If ‘DTRConnect’ is set to 1 and the ‘RTS to CTS’ function is enabled on the radio, then ‘RTS to
CTS’ takes precedence over ‘DTRConnect’.
Note:
If ‘DTRConnect’ is set to ‘2’ and ‘RTS to CTS’ is enabled, then ‘RTS to CTS’ is ignored. The
transceiver has two separate transmit and receive user data buffers. These buffers are 2 Kbytes
each. In case of a buffer overflow, the transceiver will output unpredictable data.
(5) REPEATER FREQUENCY
Repeaters are not available in the FreeWave 760 MHz Data Transceivers.
(6) NETWORK ID
Network ID allows MultiPoint networks to be established without using the Call Book. The default setting
of 255 enables the Call Book. To enable Network ID the value must be set between 0 and 4095
(excluding 255). Since Network ID does not use serial numbers, MultiPoint Masters may be replaced
without reprogramming all of the Slaves in the network. Slaves will link with the first Master that it hears
that has a matching Network ID. The Network ID function should be used in conjunction with the Subnet
ID feature (If necessary).
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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.
(9) 1 PPS ENABLE/DELAY
The 1 PPS Enable/Delay option allows the radio network to propagate a 1PPS signal from the Master to
all Slaves in a MultiPoint network. When this parameter is enabled a properly generated pulse applied on
the DTR line of the Master will provide a 1 PPS pulse on the CD line of any Slave in the network. To use
the 1 PPS Enable/Delay feature the steps outlined below must be followed:
1PPS Enable/Delay Setup:
1.
The 1 PPS Enable/Delay parameter must be set to 0 in the Master.
2.
The Master must have a 1 PPS pulse on the DTR pin.
3.
The 1 PPS Enable/Delay parameter on the Slaves must be enabled. Slaves are calibrated at the
factory.
Calibrating a Slave in 1PPS Enable/Delay mode
1. Trigger an oscilloscope on the 1 PPS pulse on the DTR line of the Master.
2. Monitor the CD line of the Slave.
3. If the timing on the Slave differs from the Master it may be adjusted via the value in the Slave's 1
PPS Enable/Delay parameter. The difference in time between each incremental integer value is
542.534nS. Changing the parameter to higher values decreases the Slave time delay and
changing the parameter to lower values increases the time delay.
When properly calibrated the CD line of a Slave radio will output a pulse that goes high for about 2mS in
synch with the 1 PPS pulse on the Master radio. The output on the Slave will occur within 20
microseconds of the input to the Master.
Note:
When 1 PPS is enabled, the Master must have a 1 PPS pulse on its DTR pin, otherwise the RF
network will not function.
(A) SLAVE/REPEATER
Repeaters are not available in the FreeWave 760 MHz Data Transceivers.
(B) DIAGNOSTICS
This option provides diagnostics data to be viewed at the Master in parallel with application data. The
diagnostic program MUST be run from the Master transceiver. Diagnostics requires the following:
1.
Diagnostics set to (1 to 128) in the Master.
2.
A second computer or serial connection to run the diagnostics software.
3.
A diagnostics cable. (Available from FreeWave Technologies.)
4.
Diagnostics software. (Available on the User Manual and System Tools CD.)
For more information on Diagnostics, please contact FreeWave Technical Support at (303) 381-9200.
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(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.
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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.
Co-located MultiPoint networks require the following parameters be unique for each network:

Network ID, unless using Call Book

Frequency Key

Max Packet Size

Min Packet Size
For more questions about the installation of Point-to-MultiPoint networks, please contact FreeWave
Technical Support at (303) 444-3862.
Factory Default Settings
FreeWave serial transceivers are shipped from the factory with the following Default Settings:
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MultiPoint Parameters
Operation Mode
Default
Point to Point Slave
(1) MASTER PACKET REPEAT 2
Set Baud Rate
Default
(2) MAX SLAVE RETRY
Baud Rate
115200
(3) RETRY ODDS
(A) Data Parity
(4) DTR CONNECT
(B) Modbus RTU
(6) NETWORK ID
255
(C) RS232/485
(7) RESERVED
(D) Setup Port
(8) MULTI MASTER SYNC
(E) TurnOffDelay/OnDelay
0/0
(9) 1 PPS ENABLE DELAY
255
(B) DIAGNOSTICS
Radio Parameters
Default
(D) RADIO ID
Not Set
(1) MAX PACKET SIZE
(2) MIN PACKET SIZE
(3) XMT RATE
(F) Flow Control
(4) RF DATA RATE
(5) RF XMT POWER
10
(6) SLAVE SECURITY
(7) RTS TO CTS
(8) RETRY TIMEOUT
255
(9) LOW POWER MODE
(A) High Noise
(B) MCU Speed
(C) Remote LED
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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. This means the user can tie up to 256 devices on the bus if all of the line
receivers have 1/8 unit load.
RS-422 is used for 4-wire or full duplex communication with one Master and multiple Slaves. The
FreeWave Master transceiver keeps the line driver asserted at all times. The maximum line length is
4,000 feet using 2, 120 ohm twisted pair cables with a 5th wire for data common.
RS-485 full duplex using 4 wire plus common is the same as RS-422, except the system can have
multiple Masters on the bus.
The most common operation of RS-485 is a two-wire comprised of a 120 ohm impedance single twisted
pair. In this system the loading of the FreeWave transceiver is as described above which allows up to 256
1/8 unit load units on the bus. Maximum line length is also 4,000 feet with a third wire required for data
common. The FreeWave transceiver will check the line to be certain no other device is transmitting before
enabling the line driver for data transmission.
When setting the transceiver to RS-485, enable Modbus and set Master Packet Repeat to 3 in the
transceiver(s) that will use RS-485. Also set TurnOff Delay to 4.
The TurnOffDelay setting in the menu is used to control the length of time the transmitter driver stays
asserted after data transmission has finished. This is needed to allow the last transmitted character to
reach the end of a long line and is normally set to one character length of time. This setting also allows 3
complete reflections to the end of the line to ensure the ringing on the line has fully dampened before
releasing the bus to another device. Shorter line lengths may use shorter delays, but four one-quartercharacter delay times are recommended. In Modbus, a TurnOffDelay setting of 0 will cause internal timing
errors.
There is no provision for hand shaking in any of the above modes of operation, so data rates of 57.6
KBaud and above are not recommended without a protocol that can handle error detection properly.
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RS-422 AND RS-485 FULL DUPLEX PIN-OUTS
Function
RX+
RXTX+
TXSignal Ground
Bare Board Pin Number
10
4 or 6
DE-9 Pin Number
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
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
CD
Carrier Detect
Output
Used to show an RF connection between transceivers.
TX
Transmit Data
Output
Used to transmit data bits serially from the transceivers to the
system device.
RX
Receive Data
Input
Used to receive data bits serially from the system device
connected to the transceivers.
DTR
Data Terminal Ready
Input
Used only in transceivers in Point-to-Point Slave/Master
switchable mode or for DTR Connect.
GND
Ground
DSR
Data Set Ready
Signal return for all signal lines shared with Pin 9.
Output
Always high when the radio is powered from the 2.5mm
power connector. Indicated power is on to the radio. Also,
this pin can be used for +12Volts when powering the
transceivers directly through the RS-232 port.
Note: This is not used on the OEM module.
RTS
Request to Send
Input
The transceiver does not recognize RTS for flow control. RTS
is used as a control line in RTS/CTS mode.
CTS
Clear to Send
Output
This signal is used to tell the system device connected to the
transceiver that the transceiver is ready to receive data.
When asserted, the transceiver will accept data, when
deasserted the transceiver will not accept data. This should
always be used for data rates above 38.4KB or there will be a
risk of lost data if an RF link is not very robust.
GND
Ground
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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. The RS232 versions use standard RS232 polarity and
voltage levels for all of the RS232 signal lines (DTR, Transmit Data, Receive Data, Carrier Detect, RTS,
and Clear to Send) and TTL standard polarity and voltage level for the Interrupt pin.
Pin 1: B+ Power input.
Pin 2: Interrupt (INT) – Input – A 0 volt level on this pin will switch the radio into Setup mode.
Pin
Assignment
Color on ACS3610xx cable
B+ input
Red
Interrupt (temporarily ground to invoke menu)
Brown
Data Terminal Ready (DTR)
Orange
Ground
Black
Transmit Data (TXD)
Yellow
Ground
Black
Receive Data (RXD)
Green
Carrier Detect (DCD)
Blue
Request to Send (RTS)
Violet (purple)
10
Clear to Send (CTS)
Gray
Note:
Pin 1 on the board level transceiver is the pin farthest from the three LEDs and pin 10 is closest
to the LEDs.
FreeWave Technical Support
For up-to-date troubleshooting information check the Support page at www.FreeWave.com.
FreeWave provides Technical Support, Monday through Friday, 8:00 AM to 5:00 PM, Mountain Time
(GMT -7) Call us toll-free at 1-800-548-5616 or factory direct after hours at 303-444-3862 or email us
at moreinfo@FreeWave.com
LUM0000XX Rev A
Version 1.0
34
760 Mhz Data Transceiver Users Manual
CHANNEL LISTS
Channel#
Freq
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
757.2
757.20625
757.2125
757.21875
757.225
757.23125
757.2375
757.24375
757.25
757.25625
757.2625
757.26875
757.275
757.28125
Channel#
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
Freq
757.2875
757.29375
757.3
757.30625
757.3125
757.31875
757.325
757.33125
757.3375
757.34375
757.35
757.35625
757.3625
757.36875
757.375
757.38125
757.3875
757.39375
757.4
757.40625
757.4125
757.41875
757.425
757.43125
757.4375
757.44375
757.45
757.45625
757.4625
757.46875
757.475
757.48125
757.4875
757.49375
757.5
757.50625
757.5125
757.51875
757.525
757.53125
757.5375
757.54375
757.55
757.55625
757.5625
757.56875
Version 1.0
Channel#
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
Freq
757.575
757.58125
757.5875
757.59375
757.6
757.60625
757.6125
757.61875
757.625
757.63125
757.6375
757.64375
757.65
757.65625
757.6625
757.66875
757.675
757.68125
757.6875
757.69375
757.7
757.70625
757.7125
757.71875
757.725
757.73125
757.7375
757.74375
757.75
757.75625
757.7625
757.76875
757.775
757.78125
757.7875
757.79375
757.8
757.80625
757.8125
757.81875
757.825
757.83125
757.8375
757.84375
757.85
757.85625
Channel#
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
Freq
757.8625
757.86875
757.875
757.88125
757.8875
757.89375
757.9
757.90625
757.9125
757.91875
757.925
757.93125
757.9375
757.94375
757.95
757.95625
757.9625
757.96875
757.975
757.98125
757.9875
757.99375
35
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
787.1875
787.19375
787.2
787.20625
787.2125
787.21875
787.225
787.23125
787.2375
787.24375
787.25
787.25625
787.2625
787.26875
787.275
787.28125
LUM0000XX Rev A
Channel#
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
Freq
787.2875
787.29375
787.3
787.30625
787.3125
787.31875
787.325
787.33125
787.3375
787.34375
787.35
787.35625
787.3625
787.36875
787.375
787.38125
787.3875
787.39375
787.4
787.40625
787.4125
787.41875
787.425
787.43125
787.4375
787.44375
787.45
787.45625
787.4625
787.46875
787.475
787.48125
787.4875
787.49375
787.5
787.50625
787.5125
787.51875
787.525
787.53125
787.5375
787.54375
787.55
787.55625
787.5625
787.56875
Channel#
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
Version 1.0
Freq
787.575
787.58125
787.5875
787.59375
787.6
787.60625
787.6125
787.61875
787.625
787.63125
787.6375
787.64375
787.65
787.65625
787.6625
787.66875
787.675
787.68125
787.6875
787.69375
787.7
787.70625
787.7125
787.71875
787.725
787.73125
787.7375
787.74375
787.75
787.75625
787.7625
787.76875
787.775
787.78125
787.7875
787.79375
787.8
787.80625
787.8125
787.81875
787.825
787.83125
787.8375
787.84375
787.85
787.85625
Channel#
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
Freq
787.8625
787.86875
787.875
787.88125
787.8875
787.89375
787.9
787.90625
787.9125
787.91875
787.925
787.93125
787.9375
787.94375
787.95
787.95625
787.9625
787.96875
787.975
787.98125
787.9875
787.99375
788
36

---

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