Javad HPT204BT 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 HPT204, AW200BT, AW200 and AW200AF
HPT204BT*
VHF Modem
Operator’s Manual
Version 1.1
Last Revised April 10, 2013

www.javad.com
© JAVAD GNSS Inc., 2013

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TABLE OF CONTENTS
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Terms and Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Manual Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Screen Captures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Technical Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Chapter 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1. Getting Acquainted. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.1. LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.2. Data and Power Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
1.3. External Antenna and Bluetooth Antenna Connectors. . . . . . . . . . . . . . . . . . . . . . .11
1.4. Mounting Bracket. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.5. Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.6. Literature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
1.7. External Antenna (not included) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
1.8. Storage Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Chapter 2. Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1. Powering HPT204BT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1.1. Power supply requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
2.2. Antenna Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.3. Installing ModemVU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.4. Connecting HPT204BT and Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.4.1. Connecting through serial port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.4.2. Connecting through USB port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.4.3. Connecting through Bluetooth® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.5. Configuring HPT204BT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.5.1. Simplex Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
2.6. Checking Firmware Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
2.7. Loading New Firmware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.8. Bluetooth Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

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Chapter 3. Command Line Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
1. Command Line Interface Convention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
1.1. Software Switching to Command Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
1.2. Hardware Switching to Command Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
1.3. Switching to Data Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2. Networking Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
2.1. LINK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3. Serial Interfacing Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.1. DPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.2. MPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4. Special Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.1. BOOT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.2. HELP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.3. SAVE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.4. SLEEP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5. Diagnostics and Identification Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.1. INFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.2. STATE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Appendix A. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
A.1. HPT204BT VHF Modem Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
A.1.1. General Radio Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
A.1.2. Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
A.1.3. Transmitter Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
A.1.4. Receiver Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
A.2. Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
A.3. Connector Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Appendix B. VHF 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 HPT204BT 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 HPT204BT. 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 – HPT204BT™1, TRIUMPH-1™, ModemVU™, JAVAD GNSS®are trademarks or
registered trademarks of JAVAD GNSS. Windows®is a registered trademark of Microsoft Corporation;
Bluetooth®word mark is owned by the Bluetooth SIG, Inc. 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 HPT204BT
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 HPT204BT MODEM.
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
1. Other names for marketing purposes are HPT204, AW200BT, AW200 and AW200AF

Preface
Terms and Conditions
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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 HPT204BT.
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 HPT204BT 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 HPT204BT 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
HPT204BT. 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 HPT204BT. 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 HPT204BT can lead to injury to persons or property and/or malfunction of
the product. The HPT204BT modem should only be repaired by authorized JAVAD GNSS warranty
service centers. Users should review and heed the safety warnings in Appendix C.
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 governed by, and
construed in accordance with, the laws of the State of California, without reference to conflict of laws.

Preface
Regulatory Information
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Regulatory Information
FCC Class A Compliance
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.
C AUTION : Any changes or modifications to the equipment not expressly approved by the party responsible for
compliance could void your authority to operate such equipment.
Canadian Emissions Labeling Requirements
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment
Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du Réglement sur le matériel
brouilleur du Canada.
Industry Canada
The term “IC:” before the equipment certification number only signifies that the Industry Canada
technical specifications were met.
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.

Preface
Manual Conventions
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Manual Conventions
This manual uses the following conventions:
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.
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.

Chapter 1
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INTRODUCTION
External extra rugged digital high power VHF radio transceiver programmable in frequency ranges from
215 to 255 MHz1. It has GMSK, BPSK, QPSK, 8PSK, and 16QAM modulations with advanced forward
error correction and data scrambling. The output power is programmable up to 4 W.
Figure 1. HP204BT
2
The HPT204BT radio transceiver provides a high-speed Point-to-Point and Point-to-Multipoint wireless
data transfer at up to 38.4 kbps. HPT204BT supports user selectable modulation techniques (GMSK,
BPSK, QPSK, 8PSK, or 16QAM), which allows the user to achieve the highest data speed for a given
range (up to 16 miles / 26 km). It also includes a selectable error correction, which improves the
functioning of the radio modem under interference.
The sophisticated features of HPT204BT include data scrambling, frequency hopping, user selectable
transmit output power level, low power consumption sleep modes, autoscanning and plug-and-play
installation for remote terminals.
The built-in software tools provide the wireless link testing, unit’s status and error statistics monitoring as
well as unit’s settings change over the air. The firmware of the HPT204BT radio transceiver resides in a
flash memory. The updating of the radio modem programs is entirely software-based. The flash memory
is re-programmable through an RS232 interface, USB, Bluetooth, or over the air. The unit’s user settings
can be changed through the built-in Command Line interface (CLI), Tracy Software or through
ModemVU.
1. Rated RF output power and frequency ranges for USA: 2 W - 217-220 MHz, 4 W - 220-222 MHz; for Canada: 4 W - 217-218 and 219-
220 MHz, 4 W - 220-222 MHz
2. Other names for marketing purposes are HPT204, AW200BT, AW200 and AW200AF

Introduction
Getting Acquainted
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1. Getting Acquainted
The HPT204BT is a rugged and very powerful external radio transceiver 146 mm wide 75 mm deep 44
mm high, weighs 488 g.
1.1. LEDs
External LED's (see Figure 2) are used for Link and Line status indication:
1.2. Data and Power Port
The HPT204BT data and power port is placed on the front of the unit (Figure 2).
Figure 2. HPT204BT front side
Through the DB15 port the HPT204BT can be connected to PC with Accessory Data-Ser-Pwr Cable,
DB9/DB15/SAE (6ft/1.8m) p/n 14-578108-02, or with JAVAD GNSS receiver with Accessory Data-Ser-
Pwr Cable, ODU-7/DB15/SAE (6ft/1,8m) p/n 14-578110-02 and can be powered. See “Powering
HPT204BT” on page 13 for detailed information.
Positio
nLED Name Color Description
1 PWR Green Active if Power connected to modem
2 SYNC Red Active whenever a signal with a level sufficient for reliable reception exists on the
radio channel.
3 TX/RX Green Active if modem receives or transmits Data over serial interface
4 BT Blue Active if modem receives or transmits Data over Bluetooth
LEDs
Data and
power port

Introduction
Getting Acquainted
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1.3. External Antenna and Bluetooth Antenna Connectors
The external antenna connects to the BNC external antenna connector and Bluetooth antenna connects to
the SMA connector which are placed on the back panel of HPT204BT.
Figure 3. External and Bluetooth Antenna Connectors
1.4. Mounting Bracket
The mounting bracket (Figure 4) connects the modem to a standard pole/adapter (Figure 4).
Figure 4. Mounting Bracket
1.5. Cables
The HPT204BT package includes standard communication and power cables for configuring the modem
and providing a power source to the modem.
Accessory Data-Ser-Pwr Cable, DB9/DB15/SAE
(6ft/1.8m)
p/n 14-578108-02
Accessory Data-Ser-Pwr Cable, ODU-7/DB15/SAE
(1,8m)
p/n 14-578110-02
External
Antenna
Bluetooth
Antenna
Mounting
Bracket

Introduction
Getting Acquainted
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1.6. Literature
HPT204BT literature, including manuals and other product information are available on the JAVAD
GNSS website (http://www.javad.com):
• HPT204BT Operator’s Manual
• Functional specifications
1.7. External Antenna (not included)
Antenna type depends on the site requirements, and may be directional or omni-directional.
Warning: Do not use HPT204BT without antenna to avoid serious damage of your device!
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 HPT204BT
To power HPT204BT use the Battery kit 1 (p/n 99-587300-10).
Figure 2-1. Battery Kit 1
2.1.1. Power supply requirements
A single external power supply is necessary to operate HPT204BT. 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 +9 ... +36V, 4A. 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 equip-
ment to the supply, make sure that the supply meets local and national safety ordinances 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.

Configuration
Antenna Installation
Power supply requirements
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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.
2.2. Antenna Installation
Warning: To avoid the equipment serious damage, do not power the modem if RF antenna is not connected!
Select the type of antenna that best fits your application and the one that offers the highest dB gain. In
addition, setup your system in the highest possible location to minimize obstacles between the
transmitting and receiving systems. Always place the antenna on the highest point available. At a
minimum, set the antenna to at least ten feet above the terrain using an antenna mast.
Some antennas intended to be attached to the pole mount adaptor (p/n 14-578117-01) are designed to be
operated with a ground plane and some without it. Antennas designed to be operated with ground plane
provide better gain, but to achieve the best performance of your antenna, add a VHF Antenna Ground
Plane Disk (p/n 10-587400-01) to the bottom of the antenna for a ground plane. VHF antenna Ground
Plane disk improves VSWR and as result increase RF power delivered from transmitter to antenna and
system distance range.
To install antenna with ground plane disc (see pictures below):
1. Unscrew the cone-shaped cable part;
2. Place the ground plane disc between cable parts and screw all parts together;
3. Attach cable with ground plane to the VHF antenna;

Configuration
Antenna Installation
Power supply requirements
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4. Place the antenna on the pole.
Use coaxial cable and connectors that are impedance-matched with the radio equipment, and make sure
to use the shortest length of cable to move the signal between the radio and the antenna:
• p/n 14-578115-01 Accessory Ant Cable BNC/Magn Mount, 12ft1
• p/n 14-578116-01 Accessory Ant Cable BNC/Mini-Magn Mount, 12ft1
• p/n 14-578117-01 Accessory Ant Cable BNC/Pole Mount, 12ft
1. For this type of antenna a metal surface, e.g. car’s roof, serves as ground plane.
1Unscrew the
2 Place the Ground Plane between 3 Attach to the
cone-shaped cable part
cable parts and screw all together
+
VHF Antenna
VHF Antenna
Ground Plane

Configuration
Installing ModemVU
Power supply requirements
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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.
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 VHF 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.
To configure the HPT204BT modem, have the following ready:
• Computer running Windows®;
• ModemVU Software installed on the computer;
• A serial cable.
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 HPT204BT and Computer
Connecting through serial port
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2.4. Connecting HPT204BT and Computer
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.
2.4.1. Connecting through serial port
To configure, or maintain HPT204BT, you need to connect the modem and a computer using an
Accessory Data-Ser-Pwr Cable, DB9/DB15/SAE (1,8m), p/n14-578108-02.
Figure 2-2. Accessory Data-Ser-Pwr Cables DB9/DB15/SAE
2.4.2. Connecting through USB port
Make sure the computer has special USB driver installed (available from www.javad.com) before
continuing. To configure, or maintain HPT204BT using USB port, you need to connect the modem and a
computer using special cable (not included in the standard kit) Access Data-Ser Cable, USB/DB15/SAE
(1,8m) (p/n 14-578123-02).
Figure 2-3. Optional cable p/n 14-578123-01
1. Download the zip-archive with USB driver from www.javad.com;
2. Extract the archive to the new empty folder;
3. Connect the USB port of the computer to the data port of the modem at the switched off power
supply by using of a cable.
4. Turn on your computer.
5. Power HPT204BT.
6. Widows will detect USB driver automatically. Otherwise it will ask to specify driver location.
Select the folder with extracted file.

Configuration
Configuring HPT204BT
Connecting through Bluetooth®
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2.4.3. Connecting through Bluetooth®
Note: Do not forget to attach the Bluetooth®antenna to Bluetooth antenna connector on the back panel of the
modem.
The HPT204BT modem contains Bluetooth®wireless technology that allows synchronization between
the modem and any other external device that supports Bluetooth®wireless technology; for example, an
IPAQ, or a computer with USB-to-Bluetooth®adapter or PCMCA-to-Bluetooth®adapter installed, etc.
HPT204BT and external device connection procedure varies slightly depending on the type of external
device used. In general, the connection procedure is as follows:
Note: Refer to your Bluetooth®-enabled external device documentation for more detailed connection
information.
1. Turn on a Bluetooth®-enabled external device and your receiver. The default external device
mode is Master; the modem’s Bluetooth®module mode is Slave.
2. Instruct the external device (Master) to search for the modem (Slave).
3. Once the Master device detects the modem, use the procedure described in the external device’s
documentation to connect it with the modem.
2.5. Configuring HPT204BT
1. Connect the computer and HPT204BT, as described in “Connecting HPT204BT and Computer”
on page 17.
2. Turn on the modem.
3. Start ModemVU.
4. Select the HPT204BT in the Options window, and click OK:
5. Select the COM port the HPT204BT modem is connected to. Click Connect.

Configuration
Configuring HPT204BT
Simplex Protocol
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2.5.1. Simplex Protocol
When the HPT204BT modem is loaded with special firmware which supports Simplex protocol1, the
ModemVU general window will be like below:
Figure 2-4. Radio Link tab. Simplex protocol
1. On the Radio Link tab, set the following parameters (Table 2-1) and click Apply.
Table 2-1. Modem Parameters for the Radio Link Tab
1. Simplex protocol is a communications protocol that is purely one-way, and where acknowledgments are not part of any application
protocol.
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 215-255 MHz4with 6.25 kHz channel bandwidth.
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. QPSK is recommended.
For both Base and Rover modems the modulation type must be the same.
Link Rate The link rate is selected automatically

Configuration
Checking Firmware Version
Simplex Protocol
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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
4. Rated RF output power and frequency ranges for USA: 2 W - 217-220 MHz, 4 W - 220-222 MHz; for Canada: 4 W - 217-218
and 219-220 MHz, 4 W - 220-222 MHz
2. When finished, click FileDisconnect.
2.6. Checking Firmware Version
Use ModemVU to check the firmware version of your HPT204BT.
1. Connect your modem and computer. See “Connecting HPT204BT and Computer” on page 17 for
this procedure.
2. Start ModemVU. Select the HPT204BT and than the COM port and click Ok (see “Configuring
HPT204BT” on page 18).
3. Click on Identification tab (Figure 2-5).
Figure 2-5. Identification tab
This tab lists important information about the hardware accessories and software properties.
4. Click FileDisconnect, then FileExit to quit ModemVU.
Link Space For both Base and Rover modems the link space must be the same.
Forward Error
Correction
Enable Enable
Scrambling Enable Enable
Parameter Base Modem Repeater Rover Modem