Javad HPT435 Series User manual

All contents in this manual are copyrighted by JAVAD GNSS.
All rights reserved.The information contained herein may not be used, accessed, copied,
stored, displayed, sold, modified, published, or distributed, or otherwise reproduced without express
written consent from JAVAD GNSS.
* Other names for marketing purposes are AW435, HPT435BT, AW435BT
HPT435*
UHF Modem
Operator’s Manual
Version 1.3
Last Revised October 22, 2009

www.javad.com

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TABLE OF CONTENTS
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Terms and Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
FCC Class B Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Canadian Emissions Labeling Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
WEEE Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Manual Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Screen Captures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Technical Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Chapter 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.1. Getting Acquainted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
1.1.1. LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
1.1.2. Data and Power Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
1.1.3. External Antenna Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1.1.4. Mounting Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1.1.5. Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1.1.6. Literature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
1.1.7. External Antenna (not included) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
1.1.8. Storage Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Chapter 2. Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.1. Powering HPT 435 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
2.1.1. Power supply requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
2.2. Configuring HPT435. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.3. Installing ModemVU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.4. Connecting HPT435 and Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
2.5. Connecting HPT435 and TRIUMPH-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
2.6. Configuring HPT435. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

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2.7. Checking Firmware Version. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.8. Loading New Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Chapter 3. Configuration Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.1. HPT435 as a Base Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.2. HPT435 as Repeater Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Appendix A. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
A.1. HPT435 UHF Modem Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
A.1.1. General Radio Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
A.1.2. Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
A.1.3. Transmitter Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
A.1.4. Receiver Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
A.2. Connector Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Power Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
DB15 Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
External Antenna RF Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Appendix B. UHF Radio Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Appendix C. Safety Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
C.1. General Warnings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Appendix D. Warranty Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

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PREFACE
Thank you for purchasing this product. The materials available in this Manual (the “Manual”)
have been prepared by JAVAD GNSS, Inc. (“JAVAD GNSS”) for owners of JAVAD GNSS
products. It is designed to assist owners with the use of HPT435 and its use is subject to these
terms and conditions (the “Terms and Conditions”).
Note: Please read these Terms and Conditions carefully.
Terms and Conditions
USE – JAVAD GNSS modems are designed to be used by a professional. The user is expected to
have a good knowledge and understanding of the user and safety instructions before operating,
inspecting or adjusting.
COPYRIGHT – All information contained in this Manual is the intellectual property of, and
copyrighted material of JAVAD GNSS. All rights are reserved. You may not use, access, copy,
store, display, create derivative works of, sell, modify, publish, distribute, or allow any third party
access to, any graphics, content, information or data in this Manual without JAVAD GNSS’
express written consent and may only use such information for the care and operation of your
HPT435. The information and data in this Manual are a valuable asset of JAVAD GNSS and are
developed by the expenditure of considerable work, time and money, and are the result of original
selection, coordination and arrangement by JAVAD GNSS.
TRADEMARKS – HPT435™, TRIUMPH-1™, ModemVU™, JAVAD GNSS®are trademarks or
registered trademarks of JAVAD GNSS. Windows®is a registered trademark of Microsoft Corporation;
Product and company names mentioned herein may be trademarks of their respective owners.
DISCLAIMER OF WARRANTY – EXCEPT FOR ANY WARRANTIES IN THIS MANUAL OR A
WARRANTY CARD ACCOMPANYING THE PRODUCT, THIS MANUAL AND THE HPT435
MODEM ARE PROVIDED “AS-IS.” THERE ARE NO OTHER WARRANTIES. JAVAD GNSS
DISCLAIMS ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY
PARTICULAR USE OR PURPOSE. JAVAD GNSS AND ITS DISTRIBUTORS SHALL NOT BE
LIABLE FOR TECHNICAL OR EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN;
NOR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE
FURNISHING, PERFORMANCE OR USE OF THIS MATERIAL OR THE HPT435 MODEM.

Preface
Terms and Conditions
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SUCH DISCLAIMED DAMAGES INCLUDE BUT ARE NOT LIMITED TO LOSS OF TIME, LOSS
OR DESTRUCTION OF DATA, LOSS OF PROFIT, SAVINGS OR REVENUE, OR LOSS OF THE
PRODUCT'S USE. IN ADDITION, JAVAD GNSS IS NOT RESPONSIBLE OR LIABLE FOR
DAMAGES OR COSTS INCURRED IN CONNECTION WITH OBTAINING SUBSTITUTE
PRODUCTS OR SOFTWARE, CLAIMS BY OTHERS, INCONVENIENCE, OR ANY OTHER
COSTS. IN ANY EVENT, JAVAD GNSS SHALL HAVE NO LIABILITY FOR DAMAGES OR
OTHERWISE TO YOU OR ANY OTHER PERSON OR ENTITY IN EXCESS OF THE PURCHASE
PRICE FOR HPT435.
LICENSE AGREEMENT – Use of any computer programs or software supplied by JAVAD
GNSS or downloaded from a JAVAD GNSS website (the “Software”) in connection with HPT435
constitutes acceptance of these Terms and Conditions in this Manual and an agreement to abide by
these Terms and Conditions. The user is granted a personal, non-exclusive, non-transferable
license to use such Software under the terms stated herein and in any case only with a single
HPT435 or single computer. You may not assign or transfer the Software or this license without
the express written consent of JAVAD GNSS. This license is effective until terminated. You may
terminate the license at any time by destroying the Software and Manual. JAVAD GNSS may
terminate the license if you fail to comply with any of the Terms or Conditions. You agree to
destroy the Software and manual upon termination of your use of HPT435. All ownership,
copyright and other intellectual property rights in and to the Software belong to JAVAD GNSS. If
these license terms are not acceptable, return any unused software and manual.
CONFIDENTIALITY – This Manual, its contents and the Software (collectively, the
“Confidential Information”) are the confidential and proprietary information of JAVAD GNSS.
You agree to treat JAVAD GNSS' Confidential Information with a degree of care no less stringent
that the degree of care you would use in safeguarding your own most valuable trade secrets.
Nothing in this paragraph shall restrict you from disclosing Confidential Information to your
employees as may be necessary or appropriate to operate or care for HPT435. Such employees
must also keep the Confidentiality Information confidential. In the event you become legally
compelled to disclose any of the Confidential Information, you shall give JAVAD GNSS
immediate notice so that it may seek a protective order or other appropriate remedy.
WEBSITE; OTHER STATEMENTS – No statement contained at the JAVAD GNSS website (or
any other website) or in any other advertisements or JAVAD GNSS literature or made by an
employee or independent contractor of JAVAD GNSS modifies these Terms and Conditions
(including the Software license, warranty and limitation of liability).
SAFETY – Improper use of HPT435 can lead to injury to persons or property and/or malfunction of the
product. The HPT435 modem should only be repaired by authorized JAVAD GNSS warranty service
centers. Users should review and heed the safety warnings in Appendix C on page 159.
MISCELLANEOUS – The above Terms and Conditions may be amended, modified,
superseded, or canceled, at any time by JAVAD GNSS. The above Terms and Conditions will be

Preface
Regulatory Information
FCC Class B Compliance
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governed by, and construed in accordance with, the laws of the State of California, without
reference to conflict of laws.
Regulatory Information
The following sections provide information on this product’s compliance with government regulations.
FCC Class B Compliance
This device complies with Part 15 of the FCC rules. Operation is subject to the following two
conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that may cause
undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reason-
able protection against harmful interference in residential installations. This equipment
generates, uses, and can radiate radio frequency energy, and if not installed and used in
accordance with the instructions, may cause harmful interference to radio communica-
tions. However, there is no guarantee that interference will not occur in a particular instal-
lation.
If this equipment does cause interference to radio or television equipment reception,
which can be determined by turning the equipment off and on, the user is encouraged to
try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Move the equipment away from the receiver.
• Plug the equipment into an outlet on a circuit different from that to which the receiver is
powered.
• Consult the dealer or an experienced radio/television technician for additional
suggestions.
Note: Any changes or modifications to the equipment not expressly approved by the party responsible
for compliance could void your authority to operate such equipment.

Preface
Manual Conventions
Canadian Emissions Labeling Requirements
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Canadian Emissions Labeling Requirements
This Class B digital apparatus meets all requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numérique de la classe B respecte toutes les exigences du Réglement sur le matériel
brouilleur du Canada.
WEEE Directive
The following information is for EU-member states only: The use of the symbol indicates that this
product may not be treated as household waste. By ensuring this product is disposed of correctly,
you will help prevent potential negative consequences for the environment and human health,
which could otherwise be caused by inappropriate waste handling of this product. For more
detailed information about the take-back and recycling of this product, please contact your
supplier where you purchased the product or consult.
Manual Conventions
This manual uses the following conventions:
Example Description
FileExit Click the File menu and click Exit
Link Space This format represents titles of dialog windows/boxes, names of menu options, identifies
program interface objects, such as checkboxes, edit boxes, radio buttons, etc.
Temp
This format is used to enter various string information (e.g., file and directory names) as
well as operator commands.

Preface
Screen Captures
WEEE Directive
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Screen Captures
This manual includes sample screen captures. Your actual screen can look slightly different from
the sample screen due to the modem you have connected, operating system used and settings you
have specified. This is normal and not a cause for concern.
Technical Assistance
If you have a problem and cannot find the information you need in the product documentation,
contact your local dealer. Alternatively, request technical support using the JAVAD GNSS World
Wide Web site at: www.javad.com.

Preface
Technical Assistance
WEEE Directive
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Chapter 1
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INTRODUCTION
External extra rugged digital high power UHF radio transceiver programmable in frequency
ranges from 406.1 to 470 MHz. It has GMSK, DBPSK, DQPSK, 4FSK, D8PSK, and D16QAM
modulations with advanced forward error correction and data scrambling. The output power is
programmable from 320 mW to 35 W.
Figure 1-1. HPT435
It takes incoming data, modulates it with GMSK, FSK, PSK or most spectrum efficient QAM
modulation and transmits it at RF power output levels from 25 dBm up to 45 dBm operating in
UHF frequency band 406.1 to 470 MHz.
The UHF transceiver is also capable of receiving RF signals through a 50 Ohm impedance
external antenna port. These signals are demodulated and output to the JAVAD GNSS receiver.
HPT435 delivers a reliable radio link at up to 38.4 kbps over the air for the 25 kHz channel
spacing, 19.2 kbps for 12.5 kHz, and 9.6 kbps for 6.25 kHz.
The unmatched features of HPT435 include data scrambling, frequency hopping, user selectable
transmit output power level, low power consumption sleep modes, autoscanning for base.
The unit’s user settings can be changed through the built-in Command Line interface (CLI), Tracy
Software or through ModemVU.

Introduction
Getting Acquainted
LEDs
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1.1. Getting Acquainted
The HPT435 is a rugged and very powerful external radio transceiver 152 mm wide 84 mm deep
72 mm high, weighs 900 g.
1.1.1. LEDs
External LED's (see Figure 1-2) are used for Link and Line status indication:
1.1.2. Data and Power Ports
The HPT435 data and power port are placed on the front of the unit (Figure 1-2).
Figure 1-2. HPT435 front side
Through the data port the HPT435 can be connected to PC with Data-Ser Cable, DB9/DB15 (6ft/
1.8m), or with JAVAD GNSS receiver with Data-Ser Cable, ODU-7/DB15 (6ft/1.8m).
Through the power port the HPT435 can be powered. See “Powering HPT 435” on page 15 for
detailed information.
Position LED Name Color Description
1 PWR Green Active if Power connected to modem
2 SYNC Red Active whenever a signal with a level exceeding the level required for reception
exists on the radio channel (min. light on 200ms).
3 TX/RX Green Active if modem receives or transmits Data over serial interface (min. light on
200ms)
4 ALARM Red Reserved
Data port
Power port
LEDs

Introduction
Getting Acquainted
External Antenna Connector
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1.1.3. External Antenna Connector
The external antenna connects to the BNC external antenna connector (Figure 1-3).
Figure 1-3. HPT435 back side
1.1.4. Mounting Bracket
The mounting bracket (Figure 1-3) connects the modem to a standard pole/adapter (Figure 1-4).
Figure 1-4. Mounting Bracket
1.1.5. Cables
The HPT435 package includes standard communication and power cables for configuring the
modem and providing a power source to the modem.
Data-Ser Cable, ODU-7/DB15 (6ft/1.8m)
p/n 14-578108-01
Data-Ser Cable, DB9/DB15 (6ft/1.8m)
p/n 14-578110-01
Power Cable, PL-700/Battery Clips (8.2 ft./2.5m)
p/n 14-578111-01
Antenna
Connector
Mounting
Bracket

Introduction
Getting Acquainted
Literature
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1.1.6. Literature
HPT435 literature, including manuals and other product information are available on the JAVAD
GNSS website (http://www.javad.com):
•HPT435 Operator’s Manual
• Functional specifications
1.1.7. External Antenna (not included)
Antenna type depends on the site requirements, and may be directional or omni-directional.
1.1.8. Storage Precautions
1. Always clean the instrument after use. Wipe off dust with a cleaning brush, then wipe off
dirt with a soft cloth.
2. Store in a location with a temperature of -40° - +85°C, and no exposure to direct sunlight.
3. Use a clean cloth, moistened with a neutral detergent or water, to clean the modem. Never
use an abrasive cleaner, ether, thinner benzene, or other solvents.
Always make sure the instrument is completely dry before storing. Dry the modem with a soft,
clean cloth.

Chapter 2
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CONFIGURATION
2.1. Powering HPT 435
You can use the rechargeable battery type Power Sonic PS-12400 or similar and Accessory Power
Cable, PL-700/Battery Clips (2.5m), p/n14-578111-01.
Figure 2-1. Power cable, PL-700/Battery clips
Warning: Powering HPT435 please observe polarity!
For PS-12400 battery charging use the charger “Power-Sonic Chargers” type PSC-124000A.
Figure 2-2. PS-12400 battery

Configuration
Powering HPT 435
Power supply requirements
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2.1.1. Power supply requirements
A single external power supply is necessary to operate HPT435. The external power supply needs
to be Listed for US and Certified for EU countries, it needs also to be a Limited Power Source and
rated for Outdoor Use and have an output rated for +12V, 10A. This may not be the same range as
other JAVAD GNSS products with which you are familiar.
C AUTION : To avoid the introduction of hazards when operating and installing, before connecting of the
equipment to the supply, make sure that the supply meets local and national safety ordi-
nances and matches the equipment’s voltage and current requirements.
C AUTION : Never attempt any maintenance or cleaning of the supply while plugged in. Always remove
supply from AC power before attempting service or cleaning.
Warning: If the voltage supplied is below the minimum specification, the modem will suspend operation. If the
voltage supplied is above the maximum specification, the modem may be permanently damaged,
voiding your warranty.
Make sure cords are located so that will not be stepped on, tripped over, or otherwise
subjected to damage or stress. Do not operate equipment with a damaged cord or plug –
replace immediately. To reduce the risk of damage to the equipment, pull by the plug body
rather than the output cord when disconnecting the equipment.
Do not operate the supply if it has received a sharp blow, been dropped, or otherwise
damaged. Do not disassemble the supply.
Warning: Before connecting the external power source and the modem, make sure that the power source
matches the modem’s voltage and current requirements.

Configuration
Configuring HPT435
Power supply requirements
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2.2. Configuring HPT435
ModemVU is JAVAD GNSS’s configuration utility for external modems and modems embedded
in JAVAD GNSS modems. ModemVU provides the following functions:
• Connecting a computer to an UHF modem via a serial port.
• Displaying information about the radio modem installed in the modem.
• Programming the radio modem’s settings.
• Loading the new modem firmware.
See the ModemVU Software Manual available on the JAVAD GNSS website for details on
configuring the UHF modem. To configure the HPT435 modem, have the following ready:
• Computer running Windows®;
• ModemVU Software installed on the computer;
• A serial cable.
2.3. Installing ModemVU
ModemVUTM is a Windows® application is a configuration program for the radio modem.
ModemVU is available from the JAVAD GNSS website.
Note: Refer to the ModemVU Software Manual for full details on installing and using ModemVU
Software.
1. If downloading the program from the website, extract the program files into a folder on
your hard drive.
2. Navigate to the location of the ModemVU program and double-click the Setup.exe icon.
3. Follow the on-screen installation instructions. Click Next to continue, Back to get back to
previous step, or Cancel to quit the installation.
4. Keep the default installation location or select a new location.
5. Click Finish to complete the installation.
6. If desired, create a shortcut on the computer’s desktop for quick access to ModemVU.
To uninstall ModemVU use the Start menu on your computer:
1. Navigate to the location of the ModemVU program and double-click the Setup.exe icon.
2. Follow the on-screen installation instructions.

Configuration
Connecting HPT435 and Computer
Power supply requirements
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2.4. Connecting HPT435 and Computer
To configure, or maintain HPT435, you need to connect the modem and a computer using an
Data-Ser Cable, DB9/DB15 (6ft/1.8m) p/n 14-578110-01 and start ModemVU.
Figure 2-3. Data-Ser Cable, DB9/DB15
Once you have established a connection between the modem and the computer, you will be able
to:
• Configure the modem and its components
• Send commands to the modem
• Use ModemVU to load new firmware to the modem
2.5. Connecting HPT435 and TRIUMPH-1
Connect the external HPT435 UHF radio to receiver’s port B with cable Accessory Data-Ser
cable, ODU-7/D15 (1.8 m) p/n 14-578108-01.
Figure 2-4. Connecting HPT435 and TRIUMPH-1
Note: The TRIUMPH-1 port B is optional. Make sure you have such option purchased.
++

Configuration
Configuring HPT435
Power supply requirements
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2.6. Configuring HPT435
1. Connect the computer and HPT 435, as described in “Connecting HPT435 and Computer”
on page 18. Turn on the HPT 435.
2. Start ModemVU.
3. Select the HPT435 (Figure 2-5), and click OK:
Figure 2-5. Options window
4. Select the COM port the HPT435 modem is connected to (Figure 2-6). Click Connect.
Figure 2-6. Connect to ModemVU
5. On the Radio Link tab, set the following parameters (Table 2-1) and click Apply (Figure 2-
7 on page 21).

Configuration
Configuring HPT435
Power supply requirements
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Table 2-1. Modem Parameters for the Radio Link Tab
Parameter Base Modem Repeater Rover Modem
Protocol
Simplex Transmitter or
Simplex Transmitter to
Repeater Simplex Repeater Simplex Receiver
For Base, Repeater, and Rover modems the protocol type must be the same.
Mode receiver/
Echo to serial port -
ON- enables echoing to
serial port;
OFF - disables echoing to
serial port
Auto - allows receiving data
from base and repeater in
auto mode1.
Only from Repeater - allows
receive data only from
repeater2.
Only from transmitter to
Repeater - allows receive
data from base transmitter3.
Frequency Set the frequency in band 406.1-470 MHz with 6.25 kHz channel spacing.
For both Base and Rover modems the frequency must be the same.
Output power Select the transmission
power for the radio modem. n/a
Modulation type Specifies a modulation scheme that will be used by your modem.
DQPSK is recommended.
For both Base and Rover modems the modulation type must be the same.
Link Rate The link rate is selected automatically
Link Space For both Base and Rover modems the link space must be the same.
Forward Error
Correction Enable Enable
Scrambling Enable Enable
1. In Auto mode rover receives the data from both base transmitter and repeater. The sophisticated
algorithm of data receiving allows the modem to eliminate any data doubling.
2. In this mode the incoming data from base transmitter will be ignored.
3. In this mode the incoming data from repeater will be ignored.