Kenwood TM-V708A instruction manual Connecting with a TNC and Personal Computer, Function

Page 77

CONNECTING WITH A TNC AND PERSONAL COMPUTER

Note:

◆Turn the transceiver power OFF before making any connections.

◆Do not share a single power supply between the transceiver and the TNC.

◆Keep as wide a separation as possible between the transceiver and the computer, to reduce noise-pickup by the transceiver.

To connect an external TNC to the

 

 

transceiver, use an optional PG-5A

 

 

cable. The DATA connector on the

 

 

front of the main unit mates with the

 

GND

6-pin mini DIN plug on this cable.

 

Power￿

Power￿

Antenna

supply

supply

 

 

TNC

 

Personal￿

TM-V708A

Data￿

Computer

 

terminal

 

 

 

PG-5A cable￿

 

 

(6-pin mini DIN)

 

Pin No.

Pin Name

Function

 

1

PKD

Packet data input

 

• TX data from TNC to transceiver.

 

 

 

 

 

 

 

 

2

DE

Ground for PKD

 

 

 

 

 

 

 

Packet standby

 

3

PKS

• TNC can use this pin to inhibit the

 

 

 

transceiver microphone input while

 

 

 

transmitting packet signals.

 

 

 

 

 

 

 

Output of detected 9600 bps data

 

4

PR9

(500 mVP-P, 10 kΩ)

 

• Also functions as a common pin for

 

 

 

 

 

 

1200 bps and 9600 bps data output.

 

 

 

 

 

5

PR1

Output of detected 1200 bps data

 

(500 mVP-P, 10 kΩ)

 

 

 

 

 

 

 

 

 

 

Squelch control output

 

 

 

• Inhibits TNC data transmitting while

 

 

 

transceiver squelch is open.

 

6

SQC

• Prevents interference to voice

 

communications on the same

 

 

 

frequency. Also prevents retries.

15

 

 

• Output Level

 

 

 

 

 

Open squelch: +5 V (High)

 

 

 

Closed squelch: 0 V (Low)

 

 

 

 

 

Note:

◆If the external TNC has a common pin for 1200 bps and 9600 bps data input, connect this pin to the DATA connector PR9 pin. Shorting the PR9 and PR1 pins will cause the TNC to malfunction.

◆If DC voltage is input to the PR1 pin, the external TNC may not function. If this problem happens, add a 10 ∝F capacitor between the PR1 pin and the TNC. Be careful with the polarity of the capacitor.

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Contents TM-V708A Thank YOU FeaturesOne or more of the following statements may be applicable When condensation occurs inside the transceiverContents Setting Scan Limits Using Program Scan Selecting the Number of Channels Using Visual ScanRecalling the Call Channel Reprogramming the Call Channel Locking Out a Memory ChannelPacket Operation Conventions Followed in this Manual Supplied AccessoriesPreparation Mobile InstallationMain Unit Installation Slide the front panel down until its locking tab clicks Front Panel InstallationModular Plug Cable Connection Fixed Station InstallationMobile Operation DC Power Cable ConnectionFixed Station Operation Antenna Connection Transceiver 15 a Supplied Accessory 20 a DC Power CableReplacing Fuses Fuse Location Fuse Current RatingMicrophone Accessory ConnectionsExternal Speakers Ewwew w Your First QSOFront Panel Getting Acquainted3SQL control Main Unit Front Microphone Indicators Memory Recall mode VFO modeProgrammable Memory PM mode Menu modeKEY Function Display TX Band and Control Band Band a & BTX Band Control BandMIC Keypad Direct Entry MC-58DM only Adjusting the Volume Switching the Power ON/OFFOperating Basics Selecting a BandSelecting a Frequency Adjusting the SquelchPress VFO to select VFO mode Transmitting Selecting Output PowerWhen you finish speaking, release Mic PTT Menu Access Menu SetupLevel Selections Default Menu ConfigurationChannel Display Auto PM Channel StoreMemory Channel Lockout Memory channel name See reference Number StoreAcknowledgement Automatic Power Off APORemote Control Offset Programming Flow Operating Through RepeatersSelecting Offset Direction Programming OffsetSelecting Offset Frequency Press c / d to select Repeater Then press OKSelecting a Tone Frequency Activating Tone FunctionPress Tone to activate the Tone function Press F, T.SELAutomatic Repeater Offset Press c/ d to select TX Hold 1-7-4, then Transmitting a 1750 Hz ToneAutomatic Simplex Check ASC Press REV to switch the Reverse function on or OFFReverse Function Press Scan to activate the Tone Frequency ID Tone Frequency IDParameter Simplex Odd-split Memory ChannelsSimplex & Repeater or ODD-SPLIT Memory CHANNEL? Select your desired transmit frequency Press M.IN Storing ODD-SPLIT Repeater FrequenciesPress M.IN 1 s Press MHz Tuning control+ Power on Select band a or B Press MR to enter Memory Recall modeRecalling a Memory Channel Clearing a Memory ChannelNaming a Memory Channel Turn the Tuning control to select the first digitPress a Repeat steps 5 and 6 to enter up to 8 digitsRecalling the Call Channel Call ChannelReprogramming the Call Channel Press VFOChannel Display MEMORY-TO-VFO TransferParameter Band a Band B Partial or Full RESET?Programmable Information Programmable Memory PMSituationit ti Application ExamplesPress F, P.IN Storing in PM ChannelsRecalling a PM Channel Auto PM Channel Store PM Channel ResetPress PM+ Power on Scan Type Scan Range ScanMode 2 61 ch Mode 1 31 chVisual Scan Selecting the Number of ChannelsTo exit Visual Scan, press ESC Using Visual ScanPress F, Visual to start Visual Scan Carrier-Operated mode Time-Operated modeSeek mode Selecting Scan Resume MethodMemory Scan VFO ScanPress VFO 1 s Select band a or BGroup Scan Press MHz Tuning control 1 sLocking Out a Memory Channel To exit Group Scan, press MHz againSelect your desired frequency for the lower limit Press F Setting Scan LimitsProgram Scan Select the appropriate band Using Program ScanTo exit Program Scan, press VFO again To exit MHz Scan, press MHz againCALL/MEMORY Scan CALL/VFO ScanTo exit Call/VFO Scan, press Call again To exit Call/Memory Scan, press Call againContinuous Tone Coded Squelch System Ctcss Using CtcssPress the left or right Band SEL to select band a or B Press Tone to activate the Ctcss functionPress Scan to activate the Ctcss Frequency ID Ctcss Frequency IDPress Tone to activate the DCS function Using DCSDigital Code Squelch DCS Press Scan to activate the DCS Code ID DCS Code IDFreq. Hz 1209 1336 1477 1633 Manual DialingDtmf Monitor Automatic Dialer Turn the Tuning control to select a characterStoring a Dtmf Number in Memory Repeat steps 4 and 5 to enter up to 8 digitsSelecting Pause Duration Transmitting a Stored Dtmf NumberSelecting TX Speed PF PF1 Programmable Function PF KeysMR PF2 VFO PF3Press the numeric keys in sequence on the keypad Auxiliary FunctionsPress VFO Press Mic Enter Programmable VFO Changing Frequency Step SizePress VFO Press F, Step Press c/ d to select your desired step sizeDisplay Dimmer Display Contrast AdjustAuto Dimmer Change POSITIVE/ Negative ReversalAutomatic Band Change ABC Blanking a Band DisplayPress MNU to exit Menu mode PWR switch MHz SQL controls VOL controlsTransceiver Lock ALL-CONTROL LockSwitching FM/AM Mode Changing Beep VolumeKEY Beep ON/ OFF Squelch Hang TimeAutomatic Power OFF APO TIME-OUT Timer TOTIntermodulation and Sensitivity Adjustments Advanced Intercept Point AIPDisplay Demonstration POWER-ON Message14 4 Press a Repeat steps 3 and 4 to enter up to 8 digitsSpeaker Mute Changing Speaker ConfigurationsConnection Mode Band a Band B Packet Operation Function Connecting with a TNC and Personal ComputerSelecting a Data Transfer Rate Key Microphone Control with MC-58DM onlyPreparation Wireless Remote ControlSelect the receive frequency on band B UHF Access Menu 1-A-3 Control and select onControl Operation Repeater Function Band SEL VS-3 Voice Synthesizer OptionalPS-33 SP-50B VS-3 Optional AccessoriesPG-2N PG-3B PG-4X PG-5A MC-45Installing the PG-4X Extension Cable KIT Installing OptionsRemove the 6 screws from the lower cover of the main unit Replace the lower cover 6 screwsConnections Using Two PG-4X Kits Connections Using One PG-4X KitService MaintenanceService Note CleaningProblem Probable Cause Corrective Action TroubleshootingVHF Band UHF Band SpecificationsTransmitter Index

TM-V708A specifications

The Kenwood TM-V708A is a versatile and powerful dual-band transceiver that caters to amateur radio enthusiasts seeking advanced communication capabilities. Designed for operation in the 144 MHz and 440 MHz bands, this mobile radio provides exceptional performance in various modes, making it ideal for both casual users and serious operators alike.

One of the standout features of the TM-V708A is its ability to operate in both VHF and UHF frequencies simultaneous, enabling users to monitor multiple channels at once. With a powerful output of up to 50 watts on VHF and 35 watts on UHF, the TM-V708A ensures strong, clear signals that can reach distant stations. The user-friendly interface includes a large display that provides clear readings of the frequency and other operational parameters, enhancing the overall experience for operators.

The Kenwood TM-V708A is equipped with advanced digital signal processing (DSP) technology. This feature minimizes background noise, ensuring that voice communications remain crystal clear even in challenging conditions. The built-in CTCSS and DCS capabilities add further functionality, allowing for selective calling and improved privacy during conversations.

This transceiver comes with a wide range of operating modes. It supports FM, AM, and SSB, providing flexibility based on operator preference and environmental conditions. Furthermore, the inclusion of APRS (Automatic Packet Reporting System) capabilities allows for real-time tracking and position reporting, making it an excellent tool for emergencies and outdoor adventures.

Another notable characteristic is its built-in memory. The TM-V708A can store a substantial number of memory channels, allowing users to quickly access their preferred frequencies. Additionally, the dual-receive function permits the monitoring of two different frequencies simultaneously, providing seamless communication in dynamic environments.

For enhanced usability, the TM-V708A includes multiple connectivity options. It features a variety of ports for connecting external equipment, allowing operators to customize their setup according to their specific needs. The unit also balances robust performance with portability, making it suitable for both mobile and stationary use.

In summary, the Kenwood TM-V708A is a powerful and feature-rich transceiver that combines advanced technologies and user-friendly design. Its dual-band capabilities, robust power output, and extensive operational modes make it an invaluable tool for amateur radio operators seeking to enhance their communication experience. Whether for casual chatting or emergency response, the TM-V708A stands as a premier choice in the market.
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