Kenwood TM-271A, TM-271E Lock Function, Data Communication Speed, Tune Enable, Press F 1s

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LOCK FUNCTION

The lock function disables most of the keys to prevent you from accidentally activating a function. Transceiver Lock is suitable for a typical mobile installation where you select most operations using the microphone.

1Press [F] (1s).

¥ ÒÓ appears when this function is ON.

¥The following keys cannot be locked:

[ ] (Power), [F] (1s), [F]+[REV], Volume control, [PTT], and the Mic keypad.

2Press [F] (1s) again to unlock the keys.

Note:

◆The Tuning control is also locked. To retain use of the Tuning control while the Lock function is ON, access Menu No. 27 (ENC) {below} and select ÒONÓ.

◆You cannot reset the transceiver {page 67} while the Lock function is ON.

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◆ You cannot switch the transceiver operating mode by pressing

[ ] (Power) + any key.

 

◆Microphone PF keys {page 59} operate normally even if the Lock function is ON.

DATA COMMUNICATION SPEED

When the transceiver is connected to a TNC {page 7} (E market models only), you can adjust the communication speed between 1200 bps and 9600 bps.

1Press [F], [MENU] and turn the Tuning control to select Menu No. 39 (DT).

2Press [MENU] and turn the Tuning control to select Ò1200Ó (default) or Ò9600Ó.

3Press [MENU] to store the setting or any other key to cancel.

4Press any key other than [MENU] to exit Menu Mode.

TUNE ENABLE

While the Lock function is ON, you sometimes may want to turn the Tuning control to change the frequency. In this case, turn the Tune Enable function ON.

1Press [F], [MENU] and turn the Tuning control to select Menu No. 27 (ENC).

2Press [MENU] and turn the Tuning control to select ÒOFFÓ (default) or ÒONÓ.

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Contents TM-271A Page Thank YOU FeaturesModels Covered by this Manual Market CodesOne or more of the following statements may be applicable When condensation occurs inside the transceiverContents Iii MHz ScanMicrophone Control Supplied Accessories Preparation Mobile InstallationDC Power Cable Connection Fixed Station Operation Fuse Location Fuse Current Rating Transceiver 15 a Supplied Accessory 20 a DC Power CableAntenna Connection Microphone hanger Microphone hanger screw 3 mm x 10 mm Accessory ConnectionsPin No Pin Name Function Connecting to a TNC E Market Models onlyYour First QSO Press Power briefly to switch the transceiver power onFront Panel Getting AcquaintedMR key DisplayREV key KeyPage Microphone Rear PanelVFO/B key CALL/A keyMR/C key PF/D keyAdjusting the Volume Switching the Power ON/OFFAdjusting the Squelch Operating BasicsTransmitting Selecting a Frequency VFO ModeWhen you finish speaking, release Mic PTT ¥ You must be in VFO mode to make a direct frequency entry Enter Mic VFO ExampleEnter What is a MENU? Menu SetupMenu Access Turn the Tuning control to select your desired MenuMenu Function List Menu Function Selections Default DisplayPower-on message Characters Beep Time-out Timer 10 minTuning control lock Call key Varies see 25,35 ReferenceData TX speed 1200/ 9600 bps Reset selectionDisplay brightness Maximum level Automatic display brightnessOffset Programming Flow Operating Through RepeatersProgramming AN Offset Tone Frequencies Hz Available Tone FrequenciesTo activate Tone, press F, Call Market version only Call Channel default settingsAutomatic Repeater Offset Automatic Simplex Check ASC Reverse FunctionPressing PTT causes the Ò Ó icon to quit blinking Tone Frequency ID ScanNumber of Memory Channels Memory ChannelsSimplex & Repeater or ODD-SPLIT Memory CHANNEL? Odd-split channels allowYes DCS code Data listed below can be stored in each Memory ChannelParameter Simplex Odd-Split Press MR 1s Recalling a Memory ChannelPress MR to erase the channel data Clearing a Memory ChannelPress MR Naming a Memory ChannelPress Menu Mic UP /DWN Memory Channel TransferPress F, VFO to copy the Memory Channel data to the VFO Channel 0 ~ Press Call to recall the Call Channel Call ChannelWX1 WX2 WX3 WX4 WX5 WX6 WX7 Weather Alert K Market Models onlyChannel Display Page Scans the Call Channel ScanScan Type Purpose Storing a Program Scan Frequency Range Turn the Tuning control or press Mic UP/DWNNormal Scan Press any key other than F or Power to stop MHz Scan Press any key other than F or Power to stop Program ScanPerforming Program Scan Press MR to store the end frequency in the Memory ChannelMemory Scan Press any key other than F or Power to stop Group ScanPress Menu 1s ChannelsCall Scan Press any key other than F or Power to stop Call ScanPriority Scan Press Call 1s to start the Call ScanIcon disappears Memory Channel LockoutCarrier-Operated Mode Time-Operated Mode defaultSeek Mode Scan Resume MethodCtcss and DCS Selective CallCtcss RejectedAvailable Ctcss Tone Frequencies Ctcss DCSDCS Codes DCS Code ID ScanManual Dialing Dual Tone MULTI-FREQUENCY Dtmf FunctionsDtmf Monitor Freq. Hz 1209 1336 1477 1633Dtmf TX Hold Turn the Tuning control to select a Dtmf codeAutomatic Dialer Press MenuRelease Mic PTT Press REV10 4 Press any key other than REV or Menu to exit Dtmf Lock Auxiliary Functions APO Auto Power OFFBeat Shift Meter SquelchÒoffó Beep FunctionFrequency Step Size Busy Channel LockoutDisplay Backlight Default step size for each model is as followsMarket Code KHzLock Function Tune EnableData Communication Speed Press F 1sProgrammable Functions Microphone PF Keys Keypad Models onlyNarrow Band FM Operation POWER-ON MessagePress MR to move to the next digit Turn the Tuning control to select a characterProgrammable VFO TIME-OUT Timer Microphone Control Key RX Mode TX ModeStoring Power-on Space MIC LockKey KMC-30 KMC-32 MC-60A PS-33/53 SP-50BKPG-46 MCP-1A can be downloaded atMaintenance TroubleshootingFull Reset Method Resetting the TransceiverWith the transceiver power OFF, press F+ Power Press F again to reset the transceiverVFO Reset Method VFO ResetWith the transceiver power OFF, press VFO+ Power Press VFO again to reset the transceiverTroubleshooting PTT Problem Probable Cause Corrective ActionGeneral SpecificationsNarrow 0.22 ∝V or less Transmitter

TM-271A, TM-271E specifications

The Kenwood TM-271A and TM-271E are robust dual-band transceivers designed for amateur radio enthusiasts looking for reliability, functionality, and ease of use. Both models operate in the VHF and UHF bands, specifically covering 144-148 MHz and 430-450 MHz, respectively. This versatility allows users to communicate across varied frequencies, making them suitable for a wide range of applications, from casual conversations to emergency communications.

One of the standout features of the TM-271A and TM-271E is their compact size, making them an ideal choice for mobile operations. Despite their small footprint, these radios pack a punch with a maximum transmit power of 50 watts in the VHF band and 35 watts in the UHF band. This power output ensures clear and effective communication over long distances, essential for outdoor activities and emergency situations.

The user-friendly interface of the TM-271 models includes a large, backlit LCD display, which provides clear visibility in various lighting conditions. The controls are intuitively arranged, allowing users to navigate functions with ease. Moreover, both models come equipped with an alphanumeric memory, allowing for the storage of up to 200 memories for easy access to frequently used frequencies.

Advanced features such as a built-in CTCSS (Continuous Tone-Coded Squelch System) and DCS (Digital Coded Squelch) enhance communication clarity by minimizing unwanted noise and ensuring that only desired signals are received. The TM-271A and TM-271E also support a wide range of modulation modes, including FM, allowing versatility in communication styles.

In terms of durability and build quality, the Kenwood TM-271 series excels with a rugged design that withstands the rigors of mobile use. The units are also equipped with a front-facing speaker that delivers excellent audio quality, ensuring clear communications even in noisy environments.

Another notable feature is the wideband reception capability, allowing users to listen to signals outside of the amateur bands, making these transceivers more versatile for everyday monitoring of public safety channels and other broadcasts. Furthermore, the inclusion of a built-in diagnostic function aids users in troubleshooting, ensuring that the radio remains in optimal working condition.

In conclusion, the Kenwood TM-271A and TM-271E are outstanding choices for amateur radio operators seeking a powerful, feature-rich, and user-friendly dual-band transceiver. Their combination of advanced technology, compact design, and rugged reliability makes them a popular choice among both novice and experienced operators in the radio community.
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