Maas AHT-28-V/AHT-78-U Handheld Transceivers
Contents
1. 36 Display Channel Name 37 Tone coder 8 Tone Search Scanning 8 Tone calling 37 VFO Step 0 40 Wide Narrow Band 41 Voice Mode and 5 41 ADVANCED 5 lt 42 PTT ID ee EE EE mT 42 Emergency Alert 7 esimees esse HEER UH csr HE IRR DE SES EER EE singe REN 43 Keypad Lock 43 Reverse 43 Tone Calling 1750 2 44 Channel 44 FM Radio 46 Wire Glonesezsssesse eter oe RE shires GEREI uin E Sama Md RESUME Temi Ense 47 OPTIONAL 85 50 DTMF Part ee RR eR ee AER erue e ER a EE EER n 51 MSK P rti sr iss SUE GREG SRSA gu PROS sake dne ES ARE DENTES I MEE AS 52 2 Part 5 se9s93c63n6 BEE RE RARR EER EER SR SEE BEE A RSA2. 15 Receive Saver RX SAV MENU 16 Functions this feature significantly reduces quiescent battery drain and you may not receive the full data burst Enter Menu 16 to set RX SAV Default OFF 16 Auto Keypad Lock AUTOLK MENU 18 Functions in order to prevent accidental frequency change or inadvertent transmission various aspects of the transceiver s keys and switches may be locked out Enter Menu 18 to set AUTOLK Default OFF When you switch AUTOLK ON the keypad will be locked automatically if there is no key operation for 5 second If the radio is locked press key to unlock it Also you can lock it using key by manual 17 Voice Prompt VOICE MENU 19 Functions enable disable voice prompt Enter Menu 19 to set VOICE Default ON 18 Power on Display setting OPN SET amp VLT amp PON MSG MENU 20821822 Functions choose power on display mode and edit power on message Enter Menu 20 to set OPN SET Default OFF OFF display model version DC battery power voltage MSG power on message Enter Menu 21 to check battery voltage Enter Menu 22 to edit power on message also you can edit it directly by program software Using VI to select character VI to switch cursor position 19 Repeater Shift setting OFFSET amp S D MENU 23 amp 28 Functions repeater stations usually located on mountaintops or other high locations provide a dramatic extension of the communication range for low
3. VFO Step setting STEP MENU 29 Functions setting of the synthesizer steps Enter Menu 29 to set VFO step Available Values 5 6 25 10 12 5 25 50 100 kHz 23 Wide Narrow band selecting N W MENU 30 Functions setting of wide narrow bandwidth Enter Menu 30 to set bandwidth Available Values Wide 25kHz Narrow 12 5kHz 24 Voice Mode and Scrambler SCR amp APRO MENU 33 amp 34 Functions only 2 5 tone version has this function The transceiver has 8 groups of scrambler it is accomplished by the addition of com ponents to the original signal in order to make extraction of the original signal difficult And its voice compand technology will make the voice more clearly in the noise environment Enter Menu 33 to set scrambler group Enter Menu 34 to set voice mode Available Values OFF COMP SCRA 141 ADVANCED FUNCTIONS 1 PTT ID SETTING PTT ID Programmed by software This transceiver supports two optional signalings MSK and DTMF DTMF signaling only supports encoding Set transmitting and receiving frequency in advance and then program PTT ID via software click in sequence Program Optional Features PTT ID setting And click the ANI mark N You can input character in BOT and EOT File Edit olla amp t Setup Language Setup View Help P Model Type 6 SIMPLE DTMF 2Tone STone 420 25000 4202500 None None High Add Wide Both CH U
4. a monitor 16 Receive Gp O o saver 17 Scan Kd mode 18 Auto GE keypad lock 261 Select parameter Parameter Explanation Confirm Return Standby availal or to select ble values ON OFF Press availal or to select ble values OFF 30 270s Press availal or to select ble values OFF WAVE CALL Press availal or to select ble values ON OFF Press availal or to select ble values ON OFF Press availal or to select ble values ON OFF Press availal or to select ble values ON OFF Press availal or to select ble values TO CO SE Press availal or to select ble values ON OFF Item Item Enter No Name item 19 Voice O o prompt 20 Power on ca EO display co 21 Battery Kd EO power o voltage 22 Power on Kd message 23 A Repeater shift B Display channel name 24 Channel GE A name CD editing 25 TX RX tco tone coder Screen Display iat Press NB amp 92 to select Select Parameter parameter Explanation to select ON OFF available values Press 3 Marea OFF DC MSG available values Press or to select available values Show
5. is located here 121 KEYBOARD These 18 keys select the operating features on the transceiver The function of the keys are described in details on pgs 16 amp 17 CALL Activates T CALL 1750Hz for repeater access and transmit DTMF and 2 5 tone signaling PTT Press it to transmit and release it to receive after your transmission is completed MONI MIC SP 4 The jack provides connection points for microphone audio earphone audio speaker and program cable Press this key disables the noise squelching action allowing you to hear very weak signals near the back ground noise level 113 LCD DISPLAY You will see various icons shown on the screen when power on The following table can help you identify icons meaning which display on LCD Description of functions Yul Operating band signal amp power meter L Low TX power active D Dual watch standby active 5 power save active VOX VOX active Repeater shift direction R Reverses the transmit and receive frequency active N Narrow band mode active Keypad lock active UI lcons Description of functions ad Squelch active 4 Beep tone active A Receive calling ID or MSG 4 Scrambler active n Battery power indicator C
6. 9 Installing External Micro Speaker 4 10 Wrist Strap Installation 10 GETTING 12 Radio Illustration 12 LCD Display si a steno erie ei ee ee cess 14 Keypad 16 MODEL 19 WORKING 20 Frequency Mode VFO trir des gerei e e eg ole EE ee EP see Eseg ee mone 20 Frequency Channel Mode 20 Channel Mode 20 FM Radio Mode 20 MENU 21 Reset 21 SET MENU 22 SHORTCUT MENU 25 DETAILED FUNCTION DESCRIPTION 30 Scan amp Scan Mode setting 30 Priority Transmll s
7. four optional signalings MSK DTMF 2 Tone 5 Tone Click in sequence program Optional Features Optional Signal Common Set the programming software also has three versions simple version Supporting MSK Signaling DTMF version Supporting MSK signaling and DTMF signaling and 5T amp 2T version Supporting MSK signaling and 2T 5T signaling Please check the version first before programming If the version of programming software is different from the radio version you cannot program via software In transmitting maybe radio cannot receive the complete signaling because radio needs time to switch when in power saving state We have to set the Digit delay that s to send a carrier first let radio receive signal then send Signaling to make sure it will be received The suggested time for delay time is more than 400S Press key LCD will display DTMF MSK or 2Tone Press and keys to make call with the desired call list message If the corresponding call list has not been edited the function is not available DTMF Part Click in sequence program Optional Features Optional Step 1 Edit the Fast Call list via programming software radio can store up to 10 groups 0 9 last calling list in total Step 2 Input the desired code into the corresponding list 16 characters in maximum Step 3 Choose the desired DTMF decoder from available values Code Squelch
8. improvement Thank you maas funk elektronik owner Peter Maas Heppendorfer Str 23 50189 Elsdorf Berrendorf maas Phone 02274 9387 0 Fax 02274 9387 31 funk elektronik importeur info maas elektronik com Copyright by Maas Elektronik 2012 www maas elektronik com
9. it will sound DU 5 Tone Part Edit 5tone message Click in sequence program Optional Features Optional Signal 5 Tone to program 5 Tone ID and 5 Tone international standard group T Common Set DotDemims xo 5 Auto ResetTimerlsiio Remote Roma 2Tore S Tone Side Tone Ir x irl The group numbers 0 9 in the call list is used to edit the 5tone ID of the radio you want to call You can put 0 9 A B C D and number including repeated ID The group in the international standard are CCIR1 CCIR2 CCITT EEA EIA NATEL ZVEL1 ZVEL2 9 groups in total Select one of them and input self ID input in ID and then write into the radio 561 E g the self ID is CCIR2 5tone is 2A358 the ID of other radio is 44044 group number is 0 As following picture 9 E MainSet 5 RemeleSunOode 1234567 Fx Digit o z B Revive Code 2345678 5 ToneStandard oes FA Tom mel fa ord coma 2 4 ar EC E EI MY ww E Ex ame Mmi ed dd 12345 sj 43 E 12345 7 EINE re Picture 9 Click Save after editing desired 5tone and then write into the radio Click More after the channel needed editing to enter setting Select 5tone in the Optional signal and
10. message of the transceiver ID code is for receiving while calling list message is for transmitting Click in sequence program Optional Features Optional Signal MSK Step 1 Edit the Fast Call list via programming software radio can store up to 10 groups 0 9 last calling list in total Step 2 Input the desired code into the corresponding list 4 characters in maximum Click save after finishing it then exit 921 Step 3 Input corresponding ID code in the calling list ID code should be corresponding to the one in the CallList e g if ID code is 1234 the corresponding callList is Group 1 Picture 3 Picture 3 Step 4 Set the optional signal of the desired channel to be MSK Click More after every frequency you edit program it in the popup Picture 4 E Setup Language Setup View Help Cafe tet 1 gt 314 9 type C SMPLE DTMF 2Tone STone 1 d gt a Scan Add Add Option TX Power Scrambler 7 QT DQT RX Freq Beas WIN Wide Option Signal 400 25000 None armar wk TX Freq Encode PITID z 400 25000 None v zi Picture 4 Make MSK call with the transceiver 1 Power on then select the channel with MSK signal 2 Press key LCD displays CALL DTMF then press keys to make call with the desired call list message If t
11. mode 241 SHORTCUT MENU OPERATION Item Item Enter No Name item 1 Frequency GE Channel scan 2 Priority Transmit 7 3 3 VOX level C ED setting 4 power gt setting 5 SQL level Gp A setting 6 Dual wait Kd A standby 7 LED a display mode 8 Background Gg light color 9 Keypad Gp beeper Screen Display 4 c Select parameter Parameter Explanation Press to change scan direction Press key to start scanning Press to select available values EDIT BUSY Press to select available values VOX level 1 8 Press or to select available values High Low Press to select available values SQL level 0 9 Press or to select available values ON OFF or to select available values ON AUTO OFF it Press or to select available values COLOR1 COLOR2 COLORS or to select available values ON OFF Confirm Return Standby 125 Item Item Enter No Name item 10 Automatic 27 Oma Number Identity 11 7 O time out aco timer 12 Busy channel E lock out 13 VOX switch 14 Transmit a over D beeper 15 Dual GE watch
12. or use number key to select the desired channel number press to confirm and then back to the receiving mode 6 FM radio channel delete Under FM memory mode turn off the radio press to turn on the radio you will see DEL in the screen and the channel number blinks press or to choose the channel number you want to delete press to confirm Repeat this operation you can delete all memory channel 25 in maximum 8 WIRE CLONE Prepare 2sets of AHT 28 V AHT 78 U 1pcs specific wired cloning cable Master radio sending messages when in wired cloning Deputy radio receiving and storing messages when in wired cloning Steps of wired clone 1 The deputy radio normally power on Connect master and deputy one with the wired cloning cable 2 Press PTT and to turn on the master radio enter the wired 147 clone state The Clone will be heard LCD displays CLONE 3 Press MONI key of the master radio to start wired clone During cloning the master radio displays Sending and deputy one displays End If cloning succeeds the master radio returns to the clone preparation state and it lights orange it displays Error Please check the cloning cable and then press MONI to enter cloning state again OPTIONAL SIGNALINGS REMOTE KILL STUN ACTIVATE AND REVIVE www maas elektronik com OPTIONAL SIGNALINGS Optional Signalings Programmed by software This transceiver supports
13. powered hand held or mobile transceivers Under VFO mode you can set the magnitude and direction of the repeater shift Enter Menu 23 to set magnitude of the repeater shift Available values 0 00 99 95 MHz Enter Menu 28 to set the repeater shift direction Default OFF 20 Display Channel Name DIS NAME amp CH NAME MENU 23824 Functions switch channel name display ON OFF and edit channel name under MR CH mode Enter Menu 23 to switch display channel name ON OFF Enter Menu 24 to edit channel name also you can edit it directly by program software Using VI to select character VI to switch cursor position 21 Tone coder amp Tone Search Scanning amp Tone calling C CDC amp R CDC amp T CDC amp SEEK 67 0 amp D023N MENU 25826827831832 Function 1 CTCSS DCS Operation Many repeater systems require that a very low frequency audio tone be superimposed on your FM carrier in order to activate the repeater This helps prevent false activation of the repeater by radar or spurious signals from other transmitters Enter Menu 25 26 27 to set TX amp RX Tone coder RX Tone coder TX Tone coder 1 Press key to select CTCSS DCS OFF After you choose CTCSS DCS press VI key to choose the right group you need 2 Press key to select DCS direction The transceiver has 50 groups CTCSS 104 groups normal inverted DCS 187 CTCSS TONE FREQUENCY Hz m DCS CODE 023 074 265 371 503 662 025 2
14. sequence 1234567 then press PTT to transmit After receiving this code the radio A will enter the remote stun status and you will hear a sound If you want to 1 61 revive it press and input remote un stun code 2345678 the radio will quit the remote stun status and enter normal operation The operation of remote kill is the same to remote stun 621 TECHNICAL PARAMETERS www maas elektronik com TECHNICAL PARAMETERS General Frequency Range VHF 136 174MHz 245 246MHz UHF 400 470MHz 350 390 2 465 520MHz Channel No 2x128 Frequency stability 2 5PPm Antenna High gain antenna Antenna Impedance 500 Operating Voltage DC7 2V Rechargeable Li ion battery Mode of operation Simple or semi duplex Dimensions WxHxD 58 x 110 x 32mm Transmitter VHF 5W 1W UHF 4W 0 5W 16 11 Output power Modulation Mode Maximum deviation S 5kHz 2 5kHz Spurious Radiation 5 7 5uW lt 65dB lt 60dB Adjacent Ch power 6dB Pre emphasis characteristics Current CTCSS DCS deviation lt 1 6A 5W 0 5kHz 0 1kHz 0 4kHz 0 1kHz Intermediation sensitivity 8 12mv lt 5 Intermediation distortion Receiver 122dBm 12dB SINAD RF Sensitivity Audio power 1W Audio Distortion 260dB 255dB Intermediation lt 10 Selectivity 2 6508 260dB Spurious Rejection 2 65dB Blocking 2 85dB Note Specification will be revised without notice due to technical
15. 66 411 506 664 026 205 271 412 703 031 274 413 523 712 032 223 306 423 526 723 036 225 311 431 532 781 043 226 315 432 546 732 047 243 325 445 565 734 050 244 331 446 606 743 051 245 332 452 754 053 246 343 454 624 E 054 251 346 455 627 5 065 252 351 462 631 071 255 356 464 632 072 261 364 465 645 073 263 365 466 654 Function 2 TONE Search Scanning In operating situations where you don t know the CTCSS DCS tone being used by another station or stations you can command the radio to listen to the incoming signal and scan in search of the tone being used Enter Menu 31 32 to start CTCSS DCS searching If the Tone scan feature does not detect a tone or code it will continue to scan indefinitely When this happens it may be that the other station is not sending any tone You can press PTT key to halt the scan at any time You also can press MONI key during Tone scanning to listen to the muted signal from the other station When you release the MONI key Tone scanning will resume Tone Scanning works either in the VFO or MR modes Function 3 TONE Calling 1750Hz If the repeaters in your country require a 1750Hz burst tone for access typically in Europe you can press and hold CALL key for 2s and transmitter will automatically be activated and a 1750Hz audio tone will be superimposed on the carrier Once access to the repeater has been gained you may release CALL and use PTT key for activating the transmitter 22
16. ANI function Enter Menu 10 to set ANI Default OFF 11 Transmitter Time Out Timer TOT MENU 11 Functions the TOT feature provides a safety switch which limits transmission to a pre programmed value This will promote battery conservation by not allowing you to make excessively long transmissions and in the event of a stuck PTT switch it can prevent interference to other users as well as battery depletion Enter Menu 11 to set TOT Default OFF 12 Busy Channel Lock Out BCLO MENU 12 Functions the BCLO feature prevents the radio s transmitter from being activated if a signal strong enough to break through the noise squelch is present On a frequency where stations using different CTCSS or DCS codes may be active BCLO prevents you from disrupting their communications accidentally because your radio may be muted by its own tone decoder Enter Menu 12 to set BCLO Default OFF OFF Disable BCLO feature WAVE the radio s PTT will be prevented only if the frequency is busy used CALL the radio s PTT will be prevented only the frequency and tone coder is the same 13 Transmit Over Beeper ROGER MENU 14 Functions sending a beeper to inform the receiver TX is over Enter Menu 14 to set ROGER Default OFF 14 Dual Watch Monitor DW MENU 15 Functions Dual Watch feature makes the transceiver can monitor the calling signal when FM radio is on and you won t miss any calling Enter Menu 15 to set DW Default OFF
17. Display mode 08 LIGHT Background Light Color 09 BEEP Keypad Beeper Setting 10 ANI Automatic Number Identity 11 TOT Transmitter Time Out Timer 12 BCLO Busy Channel Lock Out 13 VOX SW VOX Switch ON OFF 14 ROGER Transmit Over Beeper 15 DW Dual Watch Monitor 221 LCD Display Available Values Description of Function 16 RX SAV Receive Saver 17 SCAN S Scan Mode 18 AUTOLK Auto Keypad Lock 19 VOICE Voice Prompt 20 OPNSET Power on Display 21 DC Battery Power Voltage 22 MSGSET Power on Message Repeater Shift 23A OFFSET 0 000 99 995MHz Under VFO mode 23B DIS NM ON OFF Display Channel Name 24 CHNAME Channel Name Editing 25 C CDC TX RX Tone coder 26 R CDC RX Tone coder 27 T CDC TX Tone coder 28 S D Shift Direction 29 STEP VFO Step 123 Available Values WIDE NARROW OFF COMP SCRA Menu Operation 1 Under standby mode press to enter menu setting LCD displays MENU 2 Press or to select the desired menu item LCD Description of Function LCD Display Wide Narrow Band CTCSS Scanning 31 SEEK 67 0 32 SEEK D023N DCS Scanning Voice Scrambler Only for 5T amp 2T version Voice Mode Only for 5T amp 2T version display current setting of selected item 3 Press to enter and then press or to select the desired setting 4 Press to confirm 5 Press twice to exit and then return the standby
18. EEEE e E uasa E EER 54 D ONG Pant EO OE AO ERG area SEI uste 56 REMOTE KILL STUN ACTIVATE AND 59 TECHNICAL 6 lt lt lt 64 USING TIPS UNPACKING AND CHECKING EQUIPMENT www maas elektronik com USING TIPS Please read the following brief instructions non compliance with these rules may cause danger or violate the law Obey the local government regulation before using this radio improper use may violate the law and be punished Turn off the radio before entering flammable or explosive areas Do not charge or change the battery in flammable or explosive areas Turn off the radio before getting close to the blasting zone or detonator areas 8 Do not use radio whose antenna is damaged touching of damaged antenna will cause heat injury Do not attempt to open the radio the maintenance work should be done by technical expert only To avoid troubles caused by electromagnetic interference or electromagnetic compatibility please turn off the radio in places where have the banner Do not use wireless equipment such as hospital and other healthcare places n the car with an airbag do not put the radio within the scope of the airbag deployment Do not store the radio under the direct sunshine or in hot areas When you transmit with the radio do keep away from its antenna for 5cm at least B f t
19. Maas ANT 28 V ANT 18 U Handheld Transceivers User s Manual Thank you very much for using our two way radio This radio of modern design is reasonable structure with stable functions It is designed to meet different customers need for high quality with easy operation and perfect capablity We believe you are pleased with its nice shape and excellent performance This manual is suitable for using the model of maas AHT 28 V AHT 78 U Welcome to use maas two way radio www maas elektronik com Main Functions www maas elektronik com 8 groups of scrambler 2 5 tone remote stun kill activate optional CONTENTS USING 5 2 UNPACKING AND CHECKING EQUIPMENT 3 Supplied Items 3 CHARGING BATTERY 5 Charging Preparation 5 Charging 6 INSTALLATION OF ACCESSORIES 7 Installation of Battery 7 Antenna 8 Installing Belt
20. Picture 1 and Selective Call Picture 2 Step 4 Choose the Intermediate Code if you select Selective Call The first three are ID code and the fourth are Intermediate Code Step 5 Choose the group code then click save after finishing it and then exit Funcion Seting Encode Decode Funcion Seting j Encode Decode PTT ID Seting DIME Signalling in DTME Signalling E Option Signal 123456789 Code Squeteh E Option Signal 155156788 Selective Common Set Common Set Uk Internediate Code Intemediate Code DTMF DTMF ll 1 Group Code Group Code ES xm 2 Remote Stun Code Remote Stan Code Remote Kill Code Remote Kill Code Save Reset Close 191 Click More after frequency you edit programming in the popup Step 6 Set the optional signal of the desired channel to be DTMF Input the ID code and then save it after finishing it Make call with the transceiver First method 1 Power on then select the channel with DTMF signal 2 Press key LCD displays CALL DTMF then press 3 6 keys to make call with the desired call list message If the corresponding call list has not been edited it will sound DU Second method Press PTT and hold on and then press the number key to transmit MSK Part Edit the MSK
21. TCSS decoder active DCS DCS decoder active 5T 5 Tone signaling active 2T 2 Tone signaling active DTMF DTMF signaling active a Operating A band indicator v Operating B band indicator Frequency mantissa indicator Dx Tx i85 Channel number Menu items number indicator A Busy channel indicator Channel scanned available under CH mode 115 KEYPAD FUNCTIONS Switch VFO mode and MR model exit the setting Switch the Aor B frequency to be the Operating Band Lower menu item channel or frequency Upper menu item channel or frequency Enter menu mode confirm the setting Press key No action Press and Enter reset No action Switch CH No action turn on mode mode and radio VFO mode Frequency Channel No entry 3 Frequency Channel No entry 4 Frequency Channel No entry 5 Frequency Channel No entry 1 Frequency Channel No entry 2 key Enter scan Enter priority Enter VOX Enter Enter squelch item TX mode level item high low level item item power item 161 Frequency Channel No entry 6 key Enter dual wait standby item 89 1 Left cursor position when editing channel name Press and hold key to start keypad lock Channel No entry 0 Frequency Channel No entry 9 Frequency Channel No e
22. acity will reach the best condition When the battery capacity is low please charge or change the battery The battery lasts shortly even if it is fully charged the battery is depleted please contact your local dealer to buy a new authentic battery INSTALLATION OF ACCESSORIES Installation of Battery Pack 1 Fit the supplied battery pack into the batter pack trough then slide it toward the head to insert it completely in direction of arrowhead Picture 1 2 Push the battery pack lock to release the battery pack and slide it toward the bottom to remove it out in direction of arrowhead Picture 2 Picture 1 Picture 2 107 Antenna Installation The supplied antenna provides good results over VHF or UHF range of the transceiver you need However for enhanced base station medium wave and shortwave reception you may wish to connect an external antenna as the supplied antenna is very small and can t be expected to provide high performance at these frequencies The antenna has 4 different frequency bands To install the supplied antenna hold the bottom end of the antenna then screw it onto the connector on the transceiver until it is snug Do not over tighten by use of extreme force Picture 3 To uninstall the antenna hold the bottom end of it and turn it counterclockwise to remove it Picture 4 Notes Never transmit without having an antenna 7 E connected Wh
23. ame DTMF encode The remote stun code for radio A is 12345678 remote kill one is 87654321 If you want to remote un stun it please use another radio to input the working frequency of radio A press PTT to transmit at the same time to input remote stun code 12345678 After receiving this code the radio will enter the remote stun status and you will hear a sound And then press PTT and input DTMF code 12345678 the radio will quit the remote stun status and enter normal operation The operation of remote kill is the same to remote stun but in this situation radio cannot be revived by this way 3 5T amp 2T Version A Click in sequence program Optional Features Optional Signal 5 Remote kill stun code to input your desired Remote kill stun code the fixed one is 7 characters i Respond Waittime tun Code 2385577 FaDigt El n 9 E EJ oe E 4 a nd was ASTE sme os sd desc ed 12345 7 EE al m mm B press LCD displays input the code directly and then press PTT to transmit e g the Remote stun code for radio A is 1234567 revive code is 2345678 remote kill one is 7654321 If you want to remote stun it please use another one radio B to input the working frequency of radio A then press LCD displays input in
24. counter it will not restart automatically you must manually re initiate scanning if you wish to resume 2 Priority Transmit TX SEL MENU 2 Functions The AHT 28 V AHT 78 U allows you to transmit on the sub band even if you are working on the operating band Enter Menu 2 to select priority transmit band Default EDIT EDIT It will transmit on the operating band BUSY It will transmit on the band last talking used 3 VOX Level amp VOX Switch VOX amp VOX SW MENU 3813 Functions the VOX function provides automatic transmit receive switching based on voice input to the microphone With the VOX switch ON you do not need to press PTT switch in order to transmit and it is not necessary to use a VOX headset in order to utilize VOX operation Enter Menu 13 to set VOX switch Default OFF When the VOX is activated the VOX icon will appear on the display Enter Menu 3 to set VOX level It has 8 grades The higher level is the more sensitive will be The AHT 28 V AHT 78 U provides for adjustment of Hang Time of the VOX the transmit receive delay after the cessation of speech via program software Default 2s 131 4 TX Power setting POW MENU 4 Functions you can select high low TX power according to your talking environment and need When you store memories you can store High and Low power settings separately in each memory Enter Menu 4 to set TX power High 4W Low 0 5W when you select Low power
25. current voltage Press or to select available values Edit power on message Press or to select available values 0 000 99 995MHz Press or to select available values ON OFF E to select available values Input channel name Press 6238 or available values OFF QT DCS Confirm Return Standby Item Item Enter No Name item 26 RX tone GE Oa coder 27 TX tone a EB coder 28 Shift Gp A direction 29 VFO step Gp 30 Wide Gp Narrow 31 CTCSS GE a scan 32 DCS ED 33 Voice Na scrambler EB 34 Voice Kd mode 281 Select parameter Parameter Explanation availal or to select ble values OFF QT DCS Press availal or to select ble values OFF QT DCS Press availal or to select ble values Press availal or to select ble values 5K 6 25K 10K 100K Press availal or to select ble values Wide Narrow scan direction or to change Press key to start scan Press scan direction or to change Press key to start scan Press availal or to select ble values 1 8 Press availal to s
26. d the channel No will be indicated at the right side If the transceiver display name option is ON and channel name edited it will show the name of the channel Please see Shortcut Menu Operation Item 23 amp 24 Page 37 3 Channel Mode CH When you have stored a memory channel at least press key and switch power on the radio enter CH mode Channel No will be indicated on the display and if the transceiver display mode option is ON it will show the name of the channel Please see Shortcut Menu Operation Item 23 amp 24 Page 37 4 FM Radio Mode The transceiver provides frequency 70 00 108 00MHz FM radio Under this mode you can choose FM frequency you need directly Scan frequency range and store your favorite channels Press gg to enter and exit FM radio mode 201 5 MENU Mode Press key to enter MENU mode there are 34 items in total Please see SET MENU MODE Page 22 6 Reset Mode Press KB key and switch the power on to enter Reset mode then press key to enter 1 or key to select VFO FULL 2 VFO initialize all setting under frequency mode 3 FULL initialize all setting under frequency and memory mode 121 SET MENU MODE LCD Display Available Values Description of Function 01 SCAN Frequency Channel Scan 02 TX SEL EDIT BUSY Priority Transmit 03 VOX 1 8 VOX Level Setting 04 POWER High Low TX Power 05 SQL log SQL level setting 06 D WAIT Dual Wait Standby 07 LED LED
27. e remote kill status radio received DTMF code remote kill status and enter radio cannot send or receive signals If the programmed as revive the radio will quit the normal operation In this situation the radio only can be revived by programming software the method is as follows read data from radio first and then click program Optional Features gt Optional Signal Common Set and select Normal in the Remote Kill then save the data to the radio r Common Set Digit Detayims Auto Reset Timer 5 Remote Kill Type T Side Tone rc REMOTE STUN If the radio received DTMF code programmed as remote stun the radio will enter the remote stun status radio can only receive signals and cannot send signals If the radio received DTMF code programmed as 159 remote un stun the radio will quit the remote stun status and enter normal operation 1 Simple version don t have this function 2 DTMF version A Click in sequence program Optional Features Optional Signal gt gt Remote kill stun code to input your desired Remote kill stun code B In transmitting input the Remote kill stun code for the radio which you want to remote kill stun C Remote revive code is remote stun code 4 but the remote kill one aren t able to be revived by this way e g There are two radios with the s
28. elect ble values OFF COMP SCRA Confirm Return Standby DETAILED FUNCTION DESCRIPTIONS ADVANCED FUNCTIONS www maas elektronik com DETAILED FUNCTION DESCRIPTIONS 1 Scan amp Scan Mode setting SCAN amp SCANS MENU 1 amp 17 Functions under VFO MR CH mode the transceiver allows you to scan the entire current operating band and memory channels Enter Menu 1 and press key to start scanning When you have started scanning press VI key to change direction And it will halt on a signal it encounters press PTT key to stop scanning Press MONI key to stop scanning temporarily Press key again to exit the scanning function Scanning operation is basically the same in each of the above modes Before you begin take a moment to select the way in which you would like the scanner to halt on a signal Enter Menu 17 to set scan mode Default TO Three options for the scan mode are available under VFO mode TO In this mode the scanner will halt on a signal it encounters and will hold there for some time If you do not take action to disable the scanner within the time period the scanner will resume even if the stations are still active CO In this mode the scanner will halt on a signal it encounters and will hold there if the stations are still active And after the carrier has dropped the scanner will resume SE In this mode the scanner will halt on a signal it en
29. en installing the supplied antenna 27 m never hold the upper part of the antenna TAA while screwing it onto the connector on the transceiver Or you may snap the antenna Picture 4 Installing Belt Clip Align the two holds of belt clip and the two holes of the radios fix them with the supplied M2 5x5 screws Loosen the screw set to remove belt clip Picture 5 Picture 6 Picture 5 Picture 6 Installing External Micro Speaker Open the cover of the Mic speaker jack and insert the microphone speaker plugs into the jack Picture 7 Note Using the external headset or Mic speaker will affect the water tightness performance of radio If the external headset is not workable please use the headset case Wrist Strap Installation Wear strap through the hole on the back of radio Picture 8 Picture 8 101 GETTING FAMILIAR www maas elektronik com RADIO ILLUSTRATION POWER VOLUME DIAL This control toggle the transceiver s power on off and ANTENNA Connect the supplied antenna here BUSY TX The indicator turns green adjust the audio volume level during receive and turns SPEAKER The internal speaker is located here red during transmit emergency alarm MIC The internal microphone
30. enso eer EE ADS e Bee UU EE DE Ere 31 VOX Level amp VOX Switch ee euo e RI re IIR RI e BEER EE AE Gee cies 31 TX Power setting 32 Squelch Adjustment 32 Dual Wait Standby 32 LED Display Mode 33 Background Light 33 Keypad Beeper setting 33 Automatic Number Identity 33 Transmitter Time Out Timer 34 Busy Channel Lock Out 34 Transmit Over Beeper 34 Dual 35 Receive 35 Auto Keypad lt lt 35 Voice 35 Power on Display setting 36 Repeater Shift setting
31. g Please do not short circuit the battery terminals or expose of in fire Do not disassemble the battery unauthorized Charge the battery between temperature 0 and 45 The battery can not be normally charged beyond this temperature range Please turn off the transceiver when you charge it Transmitting with the transceiver in charge will affect its normal charge Do not unplug the Power Adapter or battery when it is charged If the battery pack lasts shortly even it is full of power it shows that the battery is depleted please change the battery pack Please do not charge when the battery or the radio is wet Please dry it with a cloth before charging to avoid any danger When the conductive metals such as jewelery key or decorative chains touch the battery terminals all the batteries are likely to cause damage to the items or personal injury These conductive metals may form a short circuit and generates much heat Do deal with any battery carefully especially when put it into pocket wallet or other metallic containers Charging Operation After installing the battery pack if the battery icon shows J it means that the battery pack is out of power Please charge it Indicator light of charger will show charging condition Indicator Display Status Battery Tips The battery is not fully charged in factory please charge before using it s Charge and discharge the battery for two or three times the battery cap
32. ght top of LCD 2 Press or or input channel number you want to delete then press to confirm 3 After delete it will skip into next channel if you want to delete it repeat above operation 7 FM RADIO FUNCTION 1 On off radio receiver Under standby mode press to open FM radio function LCD display 70 00M then press again radios receiver is off Note under FM radio mode if receiving the signal the radio will be out of FM mode after 5S it will be back to FM mode when the signals disappear 2 Mode selection Under FM radio mode press to switch between FM memory mode and FM frequency mode this function is unavailable when there is not FM memory channel 3 Frequency selecting Under FM frequency mode input the digits directly by keypad or press or to choose the desired frequency Under FM memory mode press or to choose the desired channel 4 FM radio search Under FM radio mode press G3 1 then press again to enter FM radio scanning you will see RADIO SEEK UP in the screen press or to change scanning direction Radio will stop scanning when frequency is available and then exits If you rotate the encoder knob it will scan again press any key 461 except or to exit 5 FM radio storage Under FM frequency mode press and then press the channel number for storage blinks the right of the screen press or
33. he corresponding call list has not been edited it will sound DU e g program the above frequency and MSK signal into two radio input ID code 1234 into radio A and input 2345 into radio B Press 1 LCD displays CALL MSK then press you can call B with A if you want to call A with B press LCD displays CALL MSK then press BB that is to say if you want to call one radio just input the ID code of that radio 2 Tone Part Edit 2Tone message Step 1 Edit the Fast Call list via programming software radio can store up to 10 groups 0 9 last calling list in total Step 2 Input the encoding requested A Tone the first tone B Tone the second tone and the gap time between A tone and B tone the default setting is 100S In encoding A tone will sound 1S while B Tone will sound 3S But when there is only A tone in the call list as group call tone A tone will sound 5S Please refer to 541 Picture 5 and Picture 6 MainSet Function Seting Function Seting PTT ID Sering PITID Setting E Option Signal Option Signal Common Set MSK 2Tone 5 Tone Common Set MSK 2 5Tene Bee gose see Picture 5 2tone as transmitting encoder Picture 6 2tone as receiving decoder Group 0 2 tone Gr
34. he radio appears smelly or smoke please shut off its power immediately and contact with your local dealer 8 Do not transmit too long for the radio may heat and hurt the user 021 UNPACKING AND CHECKING EQUIPMENT Welcome to use Maas AHT 28 V AHT 78 U Please check if any damage to the package when your receive it Carefully unpack the transceiver We recommend that you check the items listed in the following table If any items are missing or damaged during shipment please contact with your local dealer immediately Supplied Items Transceiver 1 Antenna 1 Li ion battery 1 Power Adapter 1 Charger 1 Handstrap 1 Belt Clip 1 Verification 1 Users Manual 1 Note The antenna frequency range please refers to the annular label at the bottom of antenna CHARGING BATTERY PACK INSTALLATION OF ACCESSORIES www maas elektronik com CHARGING BATTERY PACK Charging Precaution The supplied battery pack is a high performance Li ion battery with 7 4V standard voltage 1600mAh high capacity in a very compact package Under normal use the battery pack may be used for approximately 500 charge cycles and more after which operating time maybe expected to decrease If you have an old battery pack which is displaying capacity which has become diminished you should replace the pack with a new one Please use maas designated battery other batteries can cause explosion and hurt people Notice s Warnin
35. ntry 7 Frequency Channel No entry 8 Enter ANI item Enter LED item Enter color item Enter beep item 5 2 Right cursor position when editing channel name Enter or exit FM radio mode Press and hold key to start reverse frequency Press 3 ED to start emergency alert 117 MODEL VERSION WORKING MODE SET MENU MODE SHORTCUT MENU OPERATION www maas elektronik com MODEL VERSION The AHT 28 V AHT 78 U has 3 versions in total 1 Simple version 2 DTMF version 3 5T amp 2T version Set Menu 20 Power on Display OFF you will find your AHT 28 V AHT 78 U model version information when you switch the transceiver power on DTMF and 2 5 TONE version will be with remote kill stun activate revive function Only 2 5 TONE version will be with 8 groups of scrambler function Please choose the right AHT 28 V AHT 78 U model type when you use software to program it If not it will affect some functions operation Detail please see picture as below Model SIMPLE 2Tone 5Tone 119 WORKING MODE 1 Frequency Mode VFO Under this mode you can use VI key to change the freguency or input the freguency by keypad directly and store channels 2 Freguency Channel Mode MR When you have stored a memory channel at least and under VFO mode press key to enter MR mode The frequency will be indicated on the display an
36. oup 0 2 tone decoder Group 1 single tone Group 1 single tone decoder As single tone calling only input A Tone e g A Tone is 1750 Hz no need to input in another Tone The Tone in Group Call should be the same to the Tone of encoder 900 2 Step 3 Set the optional signal of the desired channel to be 2 Tone Click More after every frequency you edit program it in the popup Picture 7 8 Wew Help sa P Model Type C SIMPLE DTMF 6 ZTons 5Tone ET gt scon Add Omen for E Scan add add Option aus Power High Serombler zi Power High Scrambler 7 71 XK Frege d rci WIN wide j tion Sianal RX Frea Dinda WIN Wide Option Signal 411 80000 None armar gt 41180000 None 3 TX Frea Encode Decode o zi TX Freq Encode or Decode 1 zl 411 80000 None v vox zl 411 80000 None vox or z Picture 7 Select group 0 as 2 Tone Picture 8 Select group 1 as single tone Make 2 tone call with the transceiver 1 Power on then select the channel with 2 Tone signal 2 Press key LCD displays CALL 2T then press key to transmit 2 Tone while press E9 to transmit a single tone Group call If the corresponding call list has not been edited
37. p CH Down 2010 11 29 oa 421 If select MSK you can choose from 0 9 4 digits in maximum for BOT for EOT you can choose from 0 9 and A Z 6 characters in maximum While select DTMF for BOT you can choose from 0 to 9 and A to D 7 characters in maximum For EOT you can choose from 0 9 and A Z and 7 characters in maximum You can select BOT EOT or BOTH then save to the radio ID Setting PTT ID Setting Function Settin ai E E Option Si 1234567 1234560 Cese 2 EMERGENCY ALERT Under standby mode press 1 to enter menu setting LCD displays MENU then press to turn on emergency alert function radio will transmit emergency ring for 20S and then receive for 10S until you press PTT it will exit 3 KEYPAD LOCK SETTING Under standby mode press 6 for 2S to lock or unlock the keypad will be displayed at the top of LCD when keypad is locked 4 REVERSE FREQUENCY ON OFF Under standby mode press for 2S to turn on or off this function R will be displayed at the top of LCD when you turn on this function At this time radio s transmitting frequency is its receiving one and its receiving frequency is its transmitting one 5 TONE CALLING 1750Hz TONE To access a repeater pres
38. s and hold in key for the amount of time specified by the repeater The transmitter will automatically be activated and a 1750Hz audio tone will be superimposed on the carrier Once access to the repeater has been gained you may release key and use PTT for activating the transmission 6 CHANNEL STORAGE AND DELETE Channel Storage Under VFO mode input desired frequency by keypad directly or select one by pressing or and then press 1 the digits blinks at the right top of LCD press number to input desired channel directly or press or to choose desired one then press for storage Note after you input desired channel number if it blinks it means that this channel is already occupied you can choose another one e g to store the frequency 450 325MHz with CTCSS 151 4 to the channel 05 the step are as follows 1 Under VFO mode input 4 5 0 3 2 5 2 Press 1 or press exp then press to enter 3 Press EB to choose CTCSS mode LCD displays C CDC 67 0 4 Press or to choose 154 1 then press to confirm 5 Press twice to exit 6 Press the digit blinks at the right top of LCD 7 Press to choose or input 05 directly 8 Press for storage LCD displays MR mode and currently stored channel Channel delete 1 Under MR or CH mode press to turn on the radio LCD displays DEL and channel number blinks at the ri
39. the L icon will appear on the display 5 Squelch Adjustment SQL MENU 5 Functions The AHT 28 V AHT 78 U Squelch system allows you to mute the back ground noise when no signal is being received Not only does the Squelch system standby operation more pleasant it also significantly reduces battery current consumption Enter Menu 5 to set SQL level Default 5 6 Dual Wait Standby D WAIT MENU 6 Functions The AHT 28 V AHT 78 U allows you to receive the sub band signal even if you are working on the operating band It could monitor the signal under both master and sub band at the same time Enter Menu 6 to set Dual Wait Default ON 821 7 LED Display Mode LED MENU 7 Function select the LED Keypad Lamp mode Enter Menu 7 to select LED display mode Default AUTO ON LED display lights all the time AUTO Illuminates the LED when any key is pressed and after 3s the light is off OFF Disable the LED lamp 8 Background Light Color LIGHT MENU 8 Functions choose LED background light color Enter Menu 8 to select background light color Default COLOR1 COLOR Purple COLOR2 Blue COLORS3 Orange 9 Keypad Beeper setting BEEP MENU 9 Functions enable disable the keypad beeper Enter Menu 9 to set keypad beeper Default ON 10 Automatic Number Identity ANI MENU 10 Functions sending ID code when the transceiver transmits the others can receive it directly on the display if they also have
40. then select the List Num want to call and click ON in the Auto Response You also can set the frequency and channel then press OK to save the information to the radio Picture 10 File Edit Program Transfer Setup Language Setup View Help Olla 1411 Model C SIMPLE C DTMF 4 2Tone STone cH 1 CH Name 5 Scan Add Add TX Power RX Frea deins WIN Wide 7 434 25500 None BCL armar TX Freq Encode PTT ID pd 434 25500 None vox 2 Picture 10 157 This transceiver has 8 groups 5 Tone encoder and decoder to support the different channels the operation of calling transmitting 5 Tone are as follows 1 Select the channel with 5 tone signal LCD displays 5T at the right bottom of radio 2 Press LCD displays x 3 Input the 5 Tone ID of radio you want to call e g input A 2 3 5 B in Group 2 in sequence at this time the keys LI LI stand for and so if you want to input A 2 3 5 B press lie in sequence 4 Press PTT to transmit REMOTE KILL STUN ACTIVATE AND REVIVE If you want to use remote kill stun activate and revive please program signalling for current channel as DTMF and 2 5tone REMOTE KILL If the radio received DTMF code programmed as remote kill the radio will enter th
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