Kenwood TM-281A User Manual

© B62-2347-20 (K,E,M2)09 08 07 06 05 04 03 02144 MHz FM TRANSCEIVER INSTRUCTION MANUAL ÉMETTEUR-RÉCEPTEUR FM 144 MHzMODE D’EMPLOITRANCEPTOR FM 144 MH

314 Confirm the correct polarity of the connections, then attach the power cable to the battery terminals; red connects to the positive (+) terminal

412 Connect the transceiver’s DC power connector to the connector on the DC power cable.• Press the connectors firmly together until the locking tab

51REPLACING FUSESIf the fuse blows, determine the cause, then correct the problem. After the problem is resolved, replace the fuse. If newly install

61ACCESSORY CONNECTIONSEXTERNAL SPEAKERIf you plan to use an external speaker, choose a speaker with an impedance of 8 Ω. The external speaker jack a

71PC CONNECTIONTo utilize the optional MCP-1A software, you must first connect the transceiver to your PC using an optional Programming Cable (via the

82Are you ready to give your transceiver a quick try? Reading this section should get your voice on the air right away. The instructions below are i

93GETTING ACQUAINTEDFRONT PANELNote: This section describes only the main functions of the front panel controls. Explanations for functions not desc

103 In MR Mode, press [F] then press [VFO] to transfer the contents of the selected Memory Channel to the VFO {page 33}. t MR key Press to enter Mem

1136 Appears when the Automatic Simplex Check (ASC) function is activated {page 26}.7 Appears when the Priority Scan function is activated {page 44}.8

123REAR PANEL:@.q Antenna connector Connect an external antenna {page 5} here. When making test transmissions, connect a dummy load in place of the

INSTRUCTION MANUAL144 MHz FM TRANSCEIVER TM-281A144 MHz FM TRANSCEIVERTM-281EENGLISHInformation on Disposal of Old Electrical and Electronic Equipment

133r CALL/A key Identical to the front panel CALL key. This key can be reprogrammed if desired {page 59}. Press and hold Mic [PTT], then press [CAL

144OPERATING BASICSSWITCHING THE POWER ON/OFF1 Press [ ] (Power) to switch the transceiver power ON.• A high pitched double beep sounds and a Power

154TRANSMITTING1 To transmit, hold the microphone approximately 5 cm (2 inches) from your mouth, then press and hold Mic [PTT] and speak into the micr

164MHZ MODEIf the desired operating frequency is far away from the current frequency, it is quicker to use the MHz Tuning Mode.To adjust the MHz digit

174Example 1To enter 145.750 MHz:Key in Display[Enter] – – – – – –[1], [4], [5] 1 4 5. – – –[7], [5], [0] 1 4 5. 7 5 0Example 2To enter 145.000

185MENU SETUPWHAT IS A MENU?Many functions on this transceiver are selected or configured via a software-controlled Menu rather than through the physi

195MENU FUNCTION LISTPTS1 ezispetsycneuqerF/05/03/52/02/51/5.21/01/52.6/5/5.2zHk001ees(seiraV)egapecnerefer65T2 ycneuqerfenoTzH1.452~0.765.8842TC3ycne

205KC91yekLLAC0571/LLACees(seiraV)egapecnerefer53,52DLH02dlohXTenotzH0571FFO/NOFFO52TOT12remiTtuo-emiT.nim01/5/30126LCB22tuokcoLlennahCysuBFFO/NOFFO65

2152FP63elbammargorpenohporciMyeknoitcnuf/LLAC/RM/OFV/0571/RETNE/INOM/NI.C/NI.M/V--M/LQS/VER/ZHM/KCOL/THGIRB/WOL/TFIHS/UNEMPETS/ENOTRM953FP73elbammarg

226OPERATING THROUGH REPEATERSRepeaters, which are often installed and maintained by radio clubs, are usually located on mountain tops or other elevat

THANK YOU!Thank you for choosing this Kenwood transceiver. Kenwood always provides Amateur Radio products which surprise and excite serious hobbyists

236PROGRAMMING AN OFFSETYou must first select an amateur radio repeater downlink frequency as described in “SELECTING AN OFFSET FREQUENCY”.SELECTING

246ACTIVATING THE TONE FUNCTIONTo activate Tone, press [F], [CALL].• As you press [F], [CALL], the selection cycles as follows: “OFF” ➞ “TONE” ➞ “CT

256AUTOMATIC REPEATER OFFSETThis function automatically selects an offset direction, according to the frequency on the VHF band. The transceiver is p

266REVERSE FUNCTIONThe reverse function exchanges a separate reception and transmission frequency. So, while using a repeater, you can manually check

276Note:◆ Pressing [PTT] causes the “ ” icon to quit blinking.◆ ASC can be activated while operating in Simplex Mode. However, it does not change th

287MEMORY CHANNELSIn Memory Channels, you can store frequencies and related data that you frequently use so that you do not need to reprogram that dat

297The data listed below can be stored in each Memory Channel:ycneuqerfevieceRseYseYycneuqerftimsnarTseYycneuqerfenoTseYseYNOenoTseYseYycneuqerfSSCTCs

307• Memory Channel numbers L0/U0 ~ L2/U2 {page 40}, Pr {page 43}, and AL (Weather Alert) {page 36} (K market models only) are reserved for other fun

317USING THE MICROPHONE KEYPADYou can also recall a Memory Channel by entering a desired Memory Channel number with the microphone keypad.1 Press [MR]

327NAMING A MEMORY CHANNELYou can name Memory Channels using up to 6 alphanumeric characters. When you recall a named Memory Channel, its name appear

iPRECAUTIONSPlease observe the following precautions to prevent fire, personal injury, and/or transceiver damage:• Do not attempt to configure your t

337MEMORY CHANNEL TRANSFERMEMORY \ VFO TRANSFERAfter retrieving frequencies and associated data from Memory Recall Mode, you can copy the data to the

347The tables below illustrate how data is transferred between Memory Channels.∆ycneuqerfevieceR∆ycneuqerfevieceRycneuqerftimsnarT∆ycneuqerftimsnarTyc

357CALL CHANNELCall Channel default settings:• On K and M market models, pressing [CALL] changes the transceiver to the Call Channel.• On E market m

367Note:◆ When you recall an odd-split Call Channel, “+” and “–” appear on the display.◆ Transmit offset status and Reverse status are not stored in

3774 Press any key other than [MENU] to exit Menu Mode.• The transceiver automatically changes to the AL channel.• The Tone, CTCSS, and DCS functio

387While in Channel Display mode, you cannot activate the following functions:• VFO Mode• VFO Scan• Call/VFO Scan• MHz Scan• Scan Direction• Memory St

398SCANScan is a useful function for hands-off monitoring of your favorite frequencies. By becoming comfortable with all types of scan, you will incr

408NORMAL SCANWhen you are operating the transceiver in VFO Mode, 3 types of scanning are available: Band Scan, Program Scan, and MHz Scan.BAND SCANT

4187 Turn the Tuning control or press Mic [UP]/[DWN] to select a matching Memory Channel from U0 ~ U2.• For example, if you have selected “L0” in ste

428MEMORY SCANMemory Scan monitors Memory Channels in which you have stored frequencies.ALL-CHANNEL SCANThe transceiver scans all of the Memory Channe

iiCONTENTSVFO MODE ... 15MHz MODE ... 16

438CALL SCANYou can alternate between monitoring the Call Channel and the current operating frequency. 1 Select the frequency (in VFO or Memory Reca

448USING PRIORITY SCAN1 Press [F], [MENU] and turn the Tuning control to select Menu No. 12 (PRI).2 Press [MENU] and turn the Tuning control to select

458SCAN RESUME METHODThe transceiver stops scanning at the frequency (or Memory Channel) where a signal is detected. It then continues or stops scann

469SELECTIVE CALLCTCSS AND DCSYou may sometimes want to hear calls from only specific persons or groups. In this case, use Selective Call. This tran

479SELECTING A CTCSS FREQUENCY1 Press [F], [MENU] and turn the Tuning control or press Mic [UP]/[DWN] to select Menu No. 3 (CT).• The current CTCSS f

489• While scanning, the decimal point of the CTCSS frequency blinks.• To reverse the scan direction, turn the Tuning control or press Mic [UP]/[DWN

499• The available DCS codes are shown in the following table.320560231502552133314564216137520170431212162233324664426237620270341322362343134305726

5010DUAL TONE MULTI-FREQUENCY (DTMF) FUNCTIONSThis transceiver provides you with 10 dedicated DTMF Memory Channels. You can store a DTMF number (16 d

5110DTMF TX HOLDThis function causes the transceiver to remain in transmission mode for 2 seconds after you release each key. So, you can release Mic

52106 Repeat steps 4 and 5 to enter up to 16 digits.7 Press [MENU] to complete the entry.• Press any key other than [MR], [VFO], [F], and [MENU] to

iii1413121110987654321CHAPTER 9 SELECTIVE CALLCTCSS AND DCS ... 46CTCSS ...

5310ADJUSTING THE PAUSE DURATIONYou can change the pause duration (a space digit) stored in Memory Channels. The default setting is 500 milliseconds.

5411AUXILIARY FUNCTIONSAPO (AUTO POWER OFF)The transceiver switches OFF automatically if no keys or controls are pressed or adjusted for the selected

55111 Press [F], [MENU] and turn the Tuning control to select Menu No. 8 (SSQ).2 Press [MENU] and turn the Tuning control to select “ON” or “OFF” (def

56113 Press [MENU] to store the setting or any other key to cancel.4 Press any key other than [MENU] to exit Menu Mode.The transceiver generates the

5711The default step size for each model is as follows:KzHk5EzHk5.212MzHk5.21Market Code Default Frequency Step SizeNote: The market code is printed

5811LOCK FUNCTIONThe lock function disables most of the keys to prevent you from accidentally activating a function. Transceiver Lock is suitable for

5911MICROPHONE PF KEYS (KEYPAD MODELS ONLY)You can access many transceiver settings without using transceiver keys or controls. Microphone keys PF/D,

6011NARROW BAND FM OPERATIONBy default, the transceiver operates in normal FM (±5 kHz) mode for both transmission and reception. You can also operat

61116 Press [MENU] to complete the setting and store the Power-on message.7 Press any key other than [MENU] to exit Menu Mode.Note: If a Power-on me

6211TIME-OUT TIMERThe Time-out Timer limits the time of each transmission to a maximum of 3, 5, or 10 (default) minutes. Just before the transceiver

ivDISPLAY BACKLIGHT ... 57PERMANENT BACKLIGHT ... 57AUTOMATIC BACKLIG

6312MICROPHONE CONTROLYou can change numerous transceiver settings by operating the Mic DTMF keys.The following table shows what function is switched

64121 DTMF tones are not transmitted in TX Mode if the DTMF Lock function is ON.2 When transmitting a stored DTMF number, press Mic [PTT]+Mic [PF/D]

6513OPTIONAL ACCESSORIESMC-60AStand Microphone(MJ-88 required)PG-2NDC Power CableProgramming CableSP-50BCommunications SpeakerMCP-1AMemory Control Pro

6614TROUBLESHOOTINGMAINTENANCEGENERAL INFORMATIONThis product has been factory aligned and tested to specification before shipment. Under normal circ

6714Note:◆ Record the date of purchase, serial number and dealer from whom this product was purchased.◆ For your own information, retain a written r

6814Full Reset Method 2:1 Press [F], [MENU] and turn the Tuning control to select Menu No. 99 (RESET).2 Press [MENU] and turn the Tuning control to se

6914TROUBLESHOOTINGThe problems described in the following tables are commonly encountered operational malfunctions. These types of difficulties are

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71SPECIFICATIONSSpecifications are subject to change without notice due to advancements in technology.egnarycneuqerfXTegnarycneuqerfXRedoM )MF(E3Fecna

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1SUPPLIED ACCESSORIESAfter carefully unpacking the transceiver, identify the items listed in the table below. We recommend you keep the box and packa

73INDEX1750 Hz ... 25Accessories Optional ... 65 Supplied ...

Bu ürün 26891sayılı Resmi Gazete’de yayımlanan Elektrikli ve Elektronik Eşyalarda Bazı Zararlı Maddelerin Kullanımının Sınırlandırılmasına Dair Yönetm

21PREPARATION2 Position the transceiver, then insert and tighten the supplied hexagon SEMS screws (4) and flat washers (4).• Double check that all h