Kenwood 440 MHz TH-D7A, 144 instruction manual Automatic PACKET/ Position Reporting System

Page 69

AUTOMATIC PACKET/ POSITION REPORTING SYSTEM®

The Automatic Packet/ Position Reporting System (APRS®) is a software program and registered trademark of Bob Bruninga, WB4APR. He has made packet communications much more exciting than before. This program allows you to track mobile stations on a map which you recall on a computer screen. Imagine seeing one mobile station moving on the map which can be scaled from .5 to 2000 miles. You also may be tracked on the computer screen of another station. Stations to be tracked must transmit beacons at certain intervals. To track other stations, you usually need a computer running the APRS, a transceiver, and a TNC. To have them track you, you also need a GPS receiver. It receives signals from the satellites to inform you of your current geographical position. GPS stands for Global Positioning System. The APRS interprets the National Marine Electronics Association (NMEA) data strings coming from the GPS receiver. For further information, consult Internet Web pages relating to the APRS. You may use one of the Internet search engines to find correct URLs.

This transceiver includes a TNC and a program for dealing with data formats supported by the APRS. Its display shows information each time correct APRS data is received; you do not need a computer. It also allows you to manually enter position data (latitude/ longitude) to transmit; use this function if you do not have a GPS receiver. Besides position data this transceiver can receive or transmit the following information:

Station icon

Weather reporting 1

 

 

Position comment

Status text

 

 

Moving speed 2

Moving direction 2

 

 

1Receive only

2Can be transmitted only when using a GPS receiver.

This transceiver has a PC jack and GPS jack to connect with a personal computer and a GPS receiver. This manual, however, does not describe APRS communications which require these equipment.

Note:

◆Turn OFF the transceiver power before making the connections.

◆The GPS jack also accepts a 2.5 mm (1/10") 3-conductor plug. You may use the provided cable {page 1} to modify the cable end of your GPS receiver. The connection of each conductor (TXD/ RXD/ GND) is the same as the plug on the PG-4W {page 53}.

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PG-4W

To COM port

GPS receiver

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Contents TH-D7A Features Thank YOUModels Covered by this Manual One or more of the following statements may be applicable PrecautionsContents System Ctcss ScanFunctions Microphone ControlSKY Command 2 TH-D7A only Wireless Remote Control TH-D7A onlyMaintenance Optional AccessoriesKEY+ Power on Supplied AccessoriesConventions Followed in this Manual KEY2Latch, then slide the battery pack back PreparationInsert the charger AC plug into an AC wall outlet Installing the Hand STRAP/ Belt Hook Installing the AntennaBatteries PB-39 NiCd PB-38 NiCdInstalling Alkaline Batteries 10 2 Insert four AA LR6 alkaline batteriesAlkaline Connecting with a Cigarette Lighter Socket Connecting with a Regulated Power SupplyFirst QSO Adjusting Volume Switching Power ON/OFFOperating Basics Selecting a BandPress OK to complete the setting Adjusting SquelchPress F, Moni Press UP/ DWN to select from 6 squelch levelsSelecting lower transmit power is a wise method to When you finish speaking, release the PTT switchReduce battery consumption, if communication is still Reliable. You can program a different power for bandGetting Acquainted Indicators Band a & B Cursor KeysUP/ DWN keys OK keyVFO mode Function Select modeMemory Recall mode Menu modePacket mode Full Duplex modeCommands to the built-in TNC from a personal computer Press TNC twice to select. In this mode, you can sendKeypad Direct Entry Quick Reference Guide 1 s Key Operation FunctionCtcss ON/ OFF VFO FMenu SET-UP Menu AccessLevel Selections Default Menu ConfigurationLevel Selections Radio AUXAprs OFFSstv SKYCMD Offset Programming Flow Operating Through RepeatersPress UP/ DWN to select the appropriate offset Frequency Programming OffsetFollowing methods to bring the transmit frequency Within the band limitsPress F, 1 to switch the Tone function on or OFF Press UP/ DWN to select the appropriate tone frequency67.0 97.4 136.5 192.8 A. and Canada versions Automatic Repeater OffsetPress REV 1 s to switch the function on Press REV to switch the Reverse function on or 13 OFFReverse Function Automatic Simplex Check ASCTone FREQ. ID CHANNEL? Memory ChannelsParameter Ctcss onPress PTT+OK Press UP/ DWN to select the desired memory channel Press OKRecalling a Memory Channel Press MR+ Power onClearing a Memory Channel Press UP/ DWN to select the desired memory ChannelNaming a Memory Channel Press UP/ DWN to select the first digitRepeat steps 3 and 4 to enter up to 8 digits Call Channel TH-D7A only Press VFOPress PTT+CALL Channel Display MEMORY-TO-VFO TransferPress F+ Power on Partial or Full RESET?VHF Band Defaults Version VFO Freq Tone UHF Band DefaultsScan This transceiver provides the following types of scansScan Type Scan Range Carrier-Operated mode Time-Operated modeSeek mode Selecting Scan Resume MethodMemory Scan VFO ScanPress VFO 1 s Press MR 1 sTo quit MHz Scan, press ESC MHz ScanProgram Scan Select the desired frequency as the lower limitPress F, MR CALL/VFO Scan TH-D7A only CALL/MEMORY Scan TH-D7A onlyRecall the desired memory channel Selecting a Ctcss Frequency Continuous Tone Coded Squelch System CtcssPress F, 4 to select F-4 Ctcss Freq Press UP/ DWN to select the appropriate Ctcss frequencyPress F, 3 to switch the Ctcss function on or Using CtcssCtcss FREQ. ID OFFDual Tone MULTI-FREQUENCY Dtmf Functions Manual DialingFreq. Hz 1209 1336 1477 1633 Automatic Dialer Press UP/ DWN to select a characterPress OK Press PTT+MENU Transmitting a Stored Dtmf NumberMicrophone Control Direct Frequency Entry Auxiliary FunctionsData is accepted for the digits entered and 0 is Programmed for the digits not yet enteredProgrammable VFO Changing Frequency Step SizePress F, ENT to switch Tone Alert on or OFF Tone AlertBeep ON/OFF Adjusting Display Contrast Adjusting Volume BalanceLamp Function Blanking a Band DisplayBattery Saver Automatic Power OFF APOTransceiver Lock POWER-ON Message13 3 Press UP/ DWN to select a character 15 4 Press OKSwitching TX Deviation TH-D7E only Switching AM/FM Mode TH-D7A onlyTX Inhibit Advanced Intercept Point AIPReference material for starting packet operation should Packet OperationBe available at any store that handles Amateur Radio EquipmentCommand mode Connecting with a Personal ComputerConverse mode Operating TNCFollowing steps should guide you to a good start Preparation FlowPacket operation. The shaded steps indicate operations On your personal computer. First connectFull Duplex Selecting Data BandBand only Both BandsDX Packetclusters Monitor Comment Press List to restore the frequency displaySLOW-SCAN Television Sstv with VC-H1 Entering Call SIGN/ MESSAGE/ RSV 20 3 Press UP/ DWN to select a character22 4 Press OK Selecting Color for Call SIGN/ MESSAGE/ RSV Executing SuperimpositionPower is on VC-H1 ControlVC-H1 Automatic PACKET/ Position Reporting System Operation Flow Receiving Aprs Data Indicator Meaning What is Included?New Aprs Duplicate KEYPress List Accessing Received Aprs Data12 2 Press UP/ DWN to select the desired station 18 3 Press OKTemperature 11 3 Press UP/ DWN to select a character Programming a Call Sign13 4 Press OK 15 5 Repeat steps 3 and 4 to enter up to 9 digitsSelecting Your Station Icon Press OK Press Menu to exit Menu modePress UP/ DWN to select from 15 icons plus Others Kenwood SstvPress Menu to enter Menu mode Entering LATITUDE/ Longitude DataPress 2, 3 to select 2-3 My Pos Press UP/ DWN to select the desired comment Selecting a Position CommentEntering Status Text Press UP/ DWN to select a character17 4 Press OK All calls Programming a Group CodeSpecial Alternate netRepeat steps 3 and 4 to enter up to 32 digits Programming a Packet PathMethod 2 Generic path Method 1 Specific pathMethod 3 WIDEN-N path Method 4 Ssid pathSelecting Beacon Transmit Method Press 2, 9 to select 2-9 Data TXBcon again Restricting Reception of Aprs Data Selecting Beacon Transmit IntervalPress UP/ DWN to select the desired interval Press UP/ DWN to select the desired distanceAprs Message KEY+NEW Data Press MSG Accessing Received Aprs MessagesMessage Type StatusEntering a Message Repeat steps 4 and 5 to enter up to 9 digitsRepeat to enter a message or bulletin with up to 45 digits Press OK to start transmitting Transmitting a MessagePress PTT+VFO+ Power on Wireless Remote Control TH-D7A onlyPreparation Press a numeric key 0 to 9 to enter a 3-digit secret numberPress PTT+MR+ Power on Control OperationENT or VFO UP/ DWN To recall a memory channel SKY Command 2 TH-D7A only You can use the optional cables PG-4R to connect TransceiverTransporter with the HF transceiver. For these cables Contact your authorized Kenwood dealerOn the Commander Access Menu 4-4 and select Commander Programming Call Signs On CommanderProgramming a Tone Frequency On TransporterUP/ DWN PowerMode CLRPage Service MaintenanceService Note CleaningTroubleshooting Problem Probable Cause Corrective ActionPress A/B+ Power on to exit Press BAL, then UP/ DWN to Page Problem Probable Cause Corrective Action SMC-32 SMC-33 SMC-34 Optional AccessoriesHMC-3 EMC-3 PB-38 PB-39 BT-11PG-4W PG-3JVC-H1 PG-4V PG-4REquipment Connections Connecting Other External EquipmentGeneral VHF Band UHF Band SpecificationsTransmitter VHF Band UHF Band TNC Commands List Short Default Parameter DescriptionAppendix Echo ON/ OFF DwaitFirmrnr FIR OFF ON/ OFF Flow ON/ OFFLocation LOC Every HbaudLpath LPA GPS LtextTxdelay ResetPersist Ppersist ON/ OFFIndex
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144, 440 MHz TH-D7A, TH-D7A specifications

The Kenwood TH-D7A is a sophisticated handheld transceiver designed especially for amateur radio enthusiasts. It combines advanced features with user-friendly operation, making it a popular choice among both beginners and seasoned operators.

One of the standout features of the TH-D7A is its dual-band capability, allowing users to operate on both the 2-meter (144 MHz) and 70-centimeter (440 MHz) bands. This dual-band functionality gives operators increased flexibility and access to a wider range of communication channels. Additionally, the transceiver supports the simultaneous transmission and reception of two different frequencies, allowing for efficient monitoring of multiple communications.

The TH-D7A is equipped with an impressive 1,000 memory channels, which can be organized into 100 memory groups. This allows users to store a vast amount of frequencies and access them easily when needed. The transceiver also provides a wide frequency coverage, extending from 144 to 148 MHz and from 430 to 450 MHz in the VHF and UHF bands, respectively.

Another remarkable feature of the TH-D7A is its built-in Automatic Packet Reporting System (APRS) capabilities. This technology enables users to share real-time location data, send and receive messages, and provide status updates, making it an invaluable tool for outdoor activities and emergency communication.

In terms of construction, the TH-D7A features a durable and compact design, making it suitable for both portable and mobile use. The large, easy-to-read LCD display provides clear visibility in various lighting conditions. Additionally, the transceiver supports a variety of advanced voice modes, including FM, AM, and SSB (Single Side Band), offering a versatile communication experience.

The TH-D7A also incorporates a wide range of digital modes, enhancing its operational capabilities. With the included programming software, users can easily customize their settings, manage memory channels, and update firmware, ensuring the transceiver remains compatible with evolving technologies.

Power management is another highlight, as the TH-D7A provides adjustable output power levels, enabling users to conserve battery life when needed. Overall, the Kenwood TH-D7A is a feature-rich handheld transceiver that combines robust performance with innovative technology, making it a top choice for amateur radio operators seeking reliable communication in diverse environments. Its versatility, combined with its intuitive design, ensures it meets the needs of users across all experience levels.
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