Kenwood TM-271A, TM-271E Dual Tone MULTI-FREQUENCY Dtmf Functions, Manual Dialing, Dtmf Monitor

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DUAL TONE MULTI-FREQUENCY (DTMF) FUNCTIONS

This transceiver provides you with 10 dedicated DTMF Memory Channels. You can store a DTMF number (16 digits max.) in each of these channels to recall later for speed dialing.

Many repeaters in the U.S.A. and Canada offer a service called Autopatch. You can access the public telephone network via such a repeater by sending DTMF tones. For further information, consult your local repeater reference.

MANUAL DIALING

The keys on the Mic keypad function as DTMF keys; the

12keys found on a push-button telephone plus 4 additional keys (A, B, C, D).

To perform Manual Dialing, follow the steps below.

1Press and hold Mic [PTT] to transmit.

2While transmitting, press the keys in sequence on the keypad, to send the DTMF tones.

10

¥ The corresponding DTMF tones are transmitted.

Freq. (Hz)

1209

1336

1477

1633

 

 

 

 

 

697

1

2

3

A

770

4

5

6

B

852

7

8

9

C

941

 

0

#

D

 

 

 

 

 

¥When DTMF TX Hold is activated {page 51}, you do not need to continuously press Mic [PTT] to remain in transmission mode. However, transmission mode is retained for only 2 seconds after pressing a key, so if the next key is not pressed within this time limit, the transceiver stops transmitting.

DTMF MONITOR

When pressing the Mic DTMF keys, you will not hear DTMF tones emitted from the speaker. However, you can monitor the DTMF tones if desired.

1Press [F], [MENU] and turn the Tuning control to select Menu No. 33 (DT.M).

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

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

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

50

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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 Transceiver 15 a Supplied Accessory 20 a DC Power Cable Antenna ConnectionFuse Location Fuse Current Rating 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 BasicsSelecting a Frequency VFO Mode When you finish speaking, release Mic PTTTransmitting ¥ You must be in VFO mode to make a direct frequency entry Example EnterEnter Mic VFO 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 Available Tone Frequencies To activate Tone, press F, CallTone Frequencies Hz Call Channel default settings Automatic Repeater OffsetMarket version only 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 allowData listed below can be stored in each Memory Channel Parameter Simplex Odd-SplitYes DCS code Press MR 1s Recalling a Memory ChannelPress MR to erase the channel data Clearing a Memory ChannelNaming a Memory Channel Press MenuPress MR Memory Channel Transfer Press F, VFO to copy the Memory Channel data to the VFOMic UP /DWN 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 Scan Scan Type PurposeScans the Call Channel Turn the Tuning control or press Mic UP/DWN Normal ScanStoring a Program Scan Frequency Range 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 MenuPress REV 10 4 Press any key other than REV or Menu to exitRelease Mic PTT 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 MessageTurn the Tuning control to select a character Programmable VFOPress MR to move to the next digit TIME-OUT Timer Key RX Mode TX Mode Storing Power-onMicrophone Control MIC Lock KeySpace 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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