Kenwood 440 MHz TH-D7A, 144 instruction manual Aprs Message, Operation Flow

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APRS® MESSAGE

1The APRS® supports a function for transmitting and

2receiving a message independent of position reports.

3You can transmit a message to a single station only or a bulletin to all other stations in your group. If you specify

4a station, the entered message is transmitted up to 5

5times until a reception acknowledgment is returned.

6Each message which you transmit can consist of up to

745 alphanumeric characters. A maximum of 16 incoming or outgoing messages can be held in the message

8memory.

9

10OPERATION FLOW

11

12The following steps should guide you to a good start of

APRS Message operation.

13

14q Press [TNC] to switch ON the TNC.

15• “” appears.

16w Access Menu 1–4–1 to select band A or B as the

17data band {page 55}.

18

19e On the data band select the same frequency as

20other stations in your group.

21• You may tune to the frequency of an appropriate digipeater {page 72}.

22

23

rAccess Menu 2–1 to program your call sign (9 digits max.) {page 66}.

Now you are ready to receive a message from other stations. Refer to “RECEIVING A MESSAGE” {page 77}. To transmit a message, proceed to step t.

tIf necessary, access Menu 2–8 to program a packet path {page 72}.

yEnter a message (or bulletin) using up to 45 alphanumeric characters {page 79}.

Completing step y causes the transceiver to automatically transmit the message (or bulletin). If you send a message (not a bulletin), a reception acknowledgment should be returned; “ack” appears.

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Contents TH-D7A Features Thank YOUModels Covered by this Manual Precautions One or more of the following statements may be applicableContents Scan System CtcssFunctions Microphone ControlWireless Remote Control TH-D7A only SKY Command 2 TH-D7A onlyMaintenance Optional AccessoriesSupplied Accessories KEY+ Power onConventions Followed in this Manual KEY2Latch, then slide the battery pack back PreparationInsert the charger AC plug into an AC wall outlet Installing the Antenna Installing the Hand STRAP/ Belt HookBatteries PB-39 NiCd PB-38 NiCdInstalling Alkaline Batteries 10 2 Insert four AA LR6 alkaline batteriesAlkaline Connecting with a Regulated Power Supply Connecting with a Cigarette Lighter SocketFirst QSO Switching Power ON/OFF Adjusting VolumeOperating Basics Selecting a BandAdjusting Squelch Press OK to complete the settingPress F, Moni Press UP/ DWN to select from 6 squelch levelsWhen you finish speaking, release the PTT switch Selecting lower transmit power is a wise method toReduce battery consumption, if communication is still Reliable. You can program a different power for bandGetting Acquainted Indicators Cursor Keys Band a & BUP/ DWN keys OK keyFunction Select mode VFO modeMemory Recall mode Menu modeFull Duplex mode Packet 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 Key Operation Function 1 sCtcss ON/ OFF VFO FMenu Access Menu SET-UPMenu Configuration Level Selections DefaultRadio AUX Level SelectionsAprs OFFSstv SKYCMD Operating Through Repeaters Offset Programming FlowProgramming Offset Press UP/ DWN to select the appropriate offset FrequencyFollowing 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 Automatic Repeater Offset A. and Canada versionsPress REV to switch the Reverse function on or 13 OFF Press REV 1 s to switch the function onReverse Function Automatic Simplex Check ASCTone FREQ. ID Memory Channels CHANNEL?Parameter Ctcss onPress UP/ DWN to select the desired memory channel Press OK Press PTT+OKPress MR+ Power on Recalling a Memory ChannelClearing 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 MEMORY-TO-VFO Transfer Channel DisplayPartial or Full RESET? Press F+ Power onVHF Band Defaults Version VFO Freq Tone UHF Band DefaultsScan This transceiver provides the following types of scansScan Type Scan Range Time-Operated mode Carrier-Operated modeSeek mode Selecting Scan Resume MethodVFO Scan Memory ScanPress VFO 1 s Press MR 1 sMHz Scan To quit MHz Scan, press ESCProgram 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 Continuous Tone Coded Squelch System Ctcss Selecting a Ctcss FrequencyPress F, 4 to select F-4 Ctcss Freq Press UP/ DWN to select the appropriate Ctcss frequencyUsing Ctcss Press F, 3 to switch the Ctcss function on orCtcss 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 Transmitting a Stored Dtmf Number Press PTT+MENUMicrophone Control Auxiliary Functions Direct Frequency EntryData is accepted for the digits entered and 0 is Programmed for the digits not yet enteredChanging Frequency Step Size Programmable VFOPress F, ENT to switch Tone Alert on or OFF Tone AlertBeep ON/OFF Adjusting Volume Balance Adjusting Display ContrastLamp Function Blanking a Band DisplayAutomatic Power OFF APO Battery SaverPOWER-ON Message Transceiver Lock13 3 Press UP/ DWN to select a character 15 4 Press OKSwitching AM/FM Mode TH-D7A only Switching TX Deviation TH-D7E onlyTX Inhibit Advanced Intercept Point AIPPacket Operation Reference material for starting packet operation shouldBe available at any store that handles Amateur Radio EquipmentConnecting with a Personal Computer Command modeConverse mode Operating TNCPreparation Flow Following steps should guide you to a good startPacket operation. The shaded steps indicate operations On your personal computer. First connectSelecting Data Band Full DuplexBand only Both BandsComment Press List to restore the frequency display DX Packetclusters MonitorSLOW-SCAN Television Sstv with VC-H1 Entering Call SIGN/ MESSAGE/ RSV 20 3 Press UP/ DWN to select a character22 4 Press OK Executing Superimposition Selecting Color for Call SIGN/ MESSAGE/ RSVPower is on VC-H1 ControlVC-H1 Automatic PACKET/ Position Reporting System Operation Flow Indicator Meaning What is Included? Receiving Aprs DataNew Aprs Duplicate KEYAccessing Received Aprs Data Press List12 2 Press UP/ DWN to select the desired station 18 3 Press OKTemperature Programming a Call Sign 11 3 Press UP/ DWN to select a character13 4 Press OK 15 5 Repeat steps 3 and 4 to enter up to 9 digitsPress OK Press Menu to exit Menu mode Selecting Your Station IconPress 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 Selecting a Position Comment Press UP/ DWN to select the desired commentEntering Status Text Press UP/ DWN to select a character17 4 Press OK Programming a Group Code All callsSpecial Alternate netProgramming a Packet Path Repeat steps 3 and 4 to enter up to 32 digitsMethod 1 Specific path Method 2 Generic pathMethod 3 WIDEN-N path Method 4 Ssid pathSelecting Beacon Transmit Method Press 2, 9 to select 2-9 Data TXBcon again Selecting Beacon Transmit Interval Restricting Reception of Aprs DataPress UP/ DWN to select the desired interval Press UP/ DWN to select the desired distanceAprs Message KEY+NEW Data Accessing Received Aprs Messages Press MSGMessage 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 Transmitting a Message Press OK to start transmittingWireless Remote Control TH-D7A only Press PTT+VFO+ Power onPreparation 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 Transceiver You can use the optional cables PG-4R to connectTransporter with the HF transceiver. For these cables Contact your authorized Kenwood dealerOn the Commander Access Menu 4-4 and select Commander On Commander Programming Call SignsProgramming a Tone Frequency On TransporterPower UP/ DWNMode CLRPage Maintenance ServiceService 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 Optional Accessories SMC-32 SMC-33 SMC-34HMC-3 EMC-3 PB-38 PB-39 BT-11PG-3J PG-4WVC-H1 PG-4V PG-4RConnecting Other External Equipment Equipment ConnectionsSpecifications General VHF Band UHF BandTransmitter VHF Band UHF Band TNC Commands List Short Default Parameter DescriptionAppendix Dwait Echo ON/ OFFFirmrnr FIR OFF ON/ OFF Flow ON/ OFFHbaud Location LOC EveryLpath LPA GPS LtextReset TxdelayPersist 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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