Kenwood 440 MHz TH-D7A, 144 Connecting with a Personal Computer, Operating TNC, Command mode

Page 61

CONNECTING WITH A PERSONAL COMPUTER

You can use an optional PG-4W cable to connect the transceiver with a personal computer. For this cable, contact your authorized KENWOOD dealer.

Note: Turn OFF the transceiver power before making the connection.

OPERATING TNC

This transceiver has a built-in TNC which conforms to the AX.25 protocol. This protocol is used for communications between TNCs. The TNC accepts data from your personal computer and assembles it into packets. It then converts packets to audio tones which the transceiver can transmit. The TNC also takes audio tones from the transceiver, converts them to data for the computer, and checks for errors in the data.

1

2

3

4

5

6

To PC jack

PG-4W

2.5mm (1/10") 3-conductor plug

RXD2

TXD1 GND3

1To RXD on PC

2To TXD on PC

3To GND on PC

To COM port

DB-9 connector

Pin No.

Pin Name

tGND

eTXD

wRXD

The TNC mainly functions in Command or Converse mode. First learn the difference between these two modes.

•

Command mode

 

When you select Packet mode, the TNC enters this

 

mode. A “cmd:” prompt appears on the computer

 

screen. You can type commands from the computer

 

keyboard to change the settings on the TNC. When

 

in Converse mode, press [Ctrl]+[C] on the keyboard

 

to restore the Command mode.

•

Converse mode

 

The TNC enters this mode when a linkage with the

 

target station is established. On the computer

 

keyboard, type an appropriate command and if

 

necessary a message, then press [Enter] or

 

[Return]. What you type is converted into packets

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8

9

10

11

12

13

14

15

16

17

18

19

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Note: When the built-in TNC is ON, some internal frequency relationships may induce an internal heterodyne and cause the squelch to be opened unexpectedly. Shifting the interference will solve this problem. Press [TNC]+ POWER ON to access “BEAT SHIFT”. Press [UP]/ [DWN] to select “UPPER”. Press [OK] to complete the setting. The default is “NORMAL”.

and transmitted over the air. When in Command

mode, type CONVERSE to restore the Converse

mode; you can also type CONV or K instead.

For the commands supported by the built-in TNC, see “TNC COMMANDS LIST” on page 99.

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Contents TH-D7A Thank YOU FeaturesModels 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 KEY2Preparation Latch, then slide the battery pack backInsert the charger AC plug into an AC wall outlet Installing the Hand STRAP/ Belt Hook Installing the AntennaBatteries PB-39 NiCd PB-38 NiCd10 2 Insert four AA LR6 alkaline batteries Installing 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 OFFSKY SstvCMD 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 UP/ DWN to select the appropriate tone frequency Press F, 1 to switch the Tone function on or OFF67.0 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 ChannelPress UP/ DWN to select the first digit Naming a Memory ChannelRepeat steps 3 and 4 to enter up to 8 digits Press VFO Call Channel TH-D7A onlyPress PTT+CALL Channel Display MEMORY-TO-VFO TransferPress F+ Power on Partial or Full RESET?VHF Band Defaults Version VFO Freq Tone UHF Band DefaultsThis transceiver provides the following types of scans ScanScan 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 ScanSelect the desired frequency as the lower limit Program ScanPress F, MR CALL/MEMORY Scan TH-D7A only CALL/VFO 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 OFFManual Dialing Dual Tone MULTI-FREQUENCY Dtmf FunctionsFreq. Hz 1209 1336 1477 1633 Press UP/ DWN to select a character Automatic DialerPress 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 SizeTone Alert Press F, ENT to switch Tone Alert on or OFFBeep 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 20 3 Press UP/ DWN to select a character Entering Call SIGN/ MESSAGE/ RSV22 4 Press OK Selecting Color for Call SIGN/ MESSAGE/ RSV Executing SuperimpositionVC-H1 Control Power is onVC-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 SstvEntering LATITUDE/ Longitude Data Press Menu to enter Menu modePress 2, 3 to select 2-3 My Pos Press UP/ DWN to select the desired comment Selecting a Position CommentPress UP/ DWN to select a character Entering Status Text17 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 pathPress 2, 9 to select 2-9 Data TX Selecting Beacon Transmit MethodBcon 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 StatusRepeat steps 4 and 5 to enter up to 9 digits Entering a MessageRepeat 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 numberControl Operation Press PTT+MR+ Power onENT 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 CleaningProblem Probable Cause Corrective Action TroubleshootingPress 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 Short Default Parameter Description TNC Commands ListAppendix 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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