1. DL manuals
  2. Maas
  3. Transceiver
  4. AHT-28-V
  5. User Manual

Maas AHT-28-V User Manual

Manual is about: Handheld Transceivers

Summary of AHT-28-V

  • Page 1

    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 perfor...

  • Page 2: Main Functions

    Www.Maas-elektronik.Com single band, dual display, dual standby a/b band independent operation 2x128 channels storage and scanning fm radio and 25 stations memory wide/narrow band selectable vox 0~9 grade setting chinese/english voice prompt ctcss/dcs and scanning 1750hz tone ani function shortcut m...

  • Page 3: Main Functions

    Www.Maas-elektronik.Com single band, dual display, dual standby a/b band independent operation 2x128 channels storage and scanning fm radio and 25 stations memory wide/narrow band selectable vox 0~9 grade setting chinese/english voice prompt ctcss/dcs and scanning 1750hz tone ani function shortcut m...

  • Page 4: Using Tips

    Contents using tips unpacking and checking equipment supplied items charging battery pack charging preparation charging operation installation of accessories installation of battery pack antenna installation installing belt clip installing external micro/speaker wrist strap installation getting fami...

  • Page 5: Using Tips

    Contents using tips unpacking and checking equipment supplied items charging battery pack charging preparation charging operation installation of accessories installation of battery pack antenna installation installing belt clip installing external micro/speaker wrist strap installation getting fami...

  • Page 6: Advanced Functions

    User's manual tone coder & tone search scanning & tone calling vfo step setting wide/narrow band selecting voice mode and scrambler advanced functions ptt id setting emergency alert keypad lock setting reverse frequency tone calling (1750hz) channel storage/delete fm radio function wire clone option...

  • Page 7: Advanced Functions

    User's manual tone coder & tone search scanning & tone calling vfo step setting wide/narrow band selecting voice mode and scrambler advanced functions ptt id setting emergency alert keypad lock setting reverse frequency tone calling (1750hz) channel storage/delete fm radio function wire clone option...

  • Page 8: Using Tips

    02 03 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 b...

  • Page 9: Using Tips

    02 03 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 b...

  • Page 10: Charging Battery Pack

    User's manual 05 charging battery pack installation of accessories charging battery pack 1600 7.4v charging precaution www.Maas-elektronik.Com.

  • Page 11: Charging Battery Pack

    User's manual 05 charging battery pack installation of accessories charging battery pack 1600 7.4v charging precaution www.Maas-elektronik.Com.

  • Page 12: Installation of Accessories

    06 07 installation of accessories installation of battery pack 1) 2) 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). Push the battery pack lock to release the battery pack and slide it toward th...

  • Page 13: Installation of Accessories

    06 07 installation of accessories installation of battery pack 1) 2) 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). Push the battery pack lock to release the battery pack and slide it toward th...

  • Page 14

    08 09 antenna installation f ptt call mon i a/b scan pri vox 2 3 1 pwr sql dw 5 6 4 led colo r beep 8 9 7 * lock ani 0 # t - r fm radio exit f ptt call mon i a/b scan pri vox 2 3 1 pwr sql dw 5 6 4 led colo r beep 8 9 7 * lock ani 0 # t - r fm radio exit picture 3 picture 4 picture 3 picture 4 pictu...

  • Page 15

    08 09 antenna installation f ptt call mon i a/b scan pri vox 2 3 1 pwr sql dw 5 6 4 led colo r beep 8 9 7 * lock ani 0 # t - r fm radio exit f ptt call mon i a/b scan pri vox 2 3 1 pwr sql dw 5 6 4 led colo r beep 8 9 7 * lock ani 0 # t - r fm radio exit picture 3 picture 4 picture 3 picture 4 pictu...

  • Page 16: Getting Familiar

    User's manual picture 7 f a/b 1 2 3 scan pri vox 4 5 6 pwr sql dw 7 8 9 led color beep fm radio 0 lock ani t - r exit picture 8 sp m ic pus h getting familiar 10 installing external micro/speaker wrist strap installation www.Maas-elektronik.Com.

  • Page 17: Getting Familiar

    User's manual picture 7 f a/b 1 2 3 scan pri vox 4 5 6 pwr sql dw 7 8 9 led color beep fm radio 0 lock ani t - r exit picture 8 sp m ic pus h getting familiar 10 installing external micro/speaker wrist strap installation www.Maas-elektronik.Com.

  • Page 18: Radio Illustration

    Moni ptt call 12 13 radio illustration busy/tx the indicator turns green during receive and turns red during transmit/ emergency alarm. Mic the internal microphone is located here. Power/volume dial this control toggle the transceiver’s power on/off and adjust the audio volume level. Speaker the int...

  • Page 19: Radio Illustration

    Moni ptt call 12 13 radio illustration busy/tx the indicator turns green during receive and turns red during transmit/ emergency alarm. Mic the internal microphone is located here. Power/volume dial this control toggle the transceiver’s power on/off and adjust the audio volume level. Speaker the int...

  • Page 20: Lcd Display

    14 15 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 operating band signal & power meter low tx power active dual watch/standby active rx power save active vox active re...

  • Page 21: Lcd Display

    14 15 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 operating band signal & power meter low tx power active dual watch/standby active rx power save active vox active re...

  • Page 22: Keypad Functions

    16 press key [ ] [ ] [ ] [ ] [ ] frequency/ channel no. Entry “6” frequency/ channel no. Entry “7” frequency/ channel no. Entry “8” frequency/ channel no. Entry “9” frequency/ channel no. Entry “0” enter dual wait/standby item enter led item enter color item enter beep item enter ani item press key ...

  • Page 23: Keypad Functions

    16 press key [ ] [ ] [ ] [ ] [ ] frequency/ channel no. Entry “6” frequency/ channel no. Entry “7” frequency/ channel no. Entry “8” frequency/ channel no. Entry “9” frequency/ channel no. Entry “0” enter dual wait/standby item enter led item enter color item enter beep item enter ani item press key ...

  • Page 24: Model Version

    User's manual 19 model version working mode set menu mode shortcut menu operation model version the aht-28-v/aht-78-u has 3 versions in total: 1) simple version 2) dtmf version 3) 5t&2t version set menu 20 th power-on display off, you will find your aht-28-v/aht-78-u model version information when y...

  • Page 25: Model Version

    User's manual 19 model version working mode set menu mode shortcut menu operation model version the aht-28-v/aht-78-u has 3 versions in total: 1) simple version 2) dtmf version 3) 5t&2t version set menu 20 th power-on display off, you will find your aht-28-v/aht-78-u model version information when y...

  • Page 26: Working Mode

    20 21 working mode 1) frequency mode (vfo) under this mode, you can use [ ] / [ ] key to change the frequency or input the frequency by keypad directly and store channels. 2) frequency-channel mode (mr) when you have stored a memory channel at least and under vfo mode, press [ ] key to enter mr mode...

  • Page 27: Working Mode

    20 21 working mode 1) frequency mode (vfo) under this mode, you can use [ ] / [ ] key to change the frequency or input the frequency by keypad directly and store channels. 2) frequency-channel mode (mr) when you have stored a memory channel at least and under vfo mode, press [ ] key to enter mr mode...

  • Page 28: Set Menu Mode

    23 22 01 scan frequency/channel scan no. Lcd display description of function available values / sql level setting dual wait/standby led display mode background light color keypad beeper setting automatic number identity transmitter time-out timer busy channel lock-out vox switch on/off transmit over...

  • Page 29: Set Menu Mode

    23 22 01 scan frequency/channel scan no. Lcd display description of function available values / sql level setting dual wait/standby led display mode background light color keypad beeper setting automatic number identity transmitter time-out timer busy channel lock-out vox switch on/off transmit over...

  • Page 30: Shortcut Menu Operation

    25 24 menu operation under standby mode, press [ ] to enter menu setting, lcd displays “menu”. Press [ ] or [ ] to select the desired menu item, lcd display current setting of selected item. Press [ ] to enter and then press [ ] or [ ] to select the desired setting. Press [ ] to confirm. Press [ ] t...

  • Page 31: Shortcut Menu Operation

    25 24 menu operation under standby mode, press [ ] to enter menu setting, lcd displays “menu”. Press [ ] or [ ] to select the desired menu item, lcd display current setting of selected item. Press [ ] to enter and then press [ ] or [ ] to select the desired setting. Press [ ] to confirm. Press [ ] t...

  • Page 32

    26 27 item no. Item name enter item screen display parameter explanation confirm return standby select parameter + automatic number identity 10) + transmitter time-out timer 11) + busy channel lock-out 12) + vox switch 13) + transmit over beeper 14) + dual watch/ monitor 15) + receive saver 16) + sc...

  • Page 33

    26 27 item no. Item name enter item screen display parameter explanation confirm return standby select parameter + automatic number identity 10) + transmitter time-out timer 11) + busy channel lock-out 12) + vox switch 13) + transmit over beeper 14) + dual watch/ monitor 15) + receive saver 16) + sc...

  • Page 34: Advanced Functions

    User's manual detailed function descriptions advanced functions 28 item no. Item name enter item screen display parameter explanation confirm return standby select parameter + rx tone coder 26) + tx tone coder 27) + shift direction 28) + vfo step 29) + wide/ narrow band 30) + ctcss scan 31) + dcs sc...

  • Page 35: Advanced Functions

    User's manual detailed function descriptions advanced functions 28 item no. Item name enter item screen display parameter explanation confirm return standby select parameter + rx tone coder 26) + tx tone coder 27) + shift direction 28) + vfo step 29) + wide/ narrow band 30) + ctcss scan 31) + dcs sc...

  • Page 36

    30 31 detailed function descriptions 1) scan & scan mode setting (scan&scans---menu 1&17) functions: under vfo/mr/ch mode, the transceiver allows you to scan the entire current operating band and memory channels. Enter menu 1 st and press [ ] key to start scanning. When you have started scanning, pr...

  • Page 37

    30 31 detailed function descriptions 1) scan & scan mode setting (scan&scans---menu 1&17) functions: under vfo/mr/ch mode, the transceiver allows you to scan the entire current operating band and memory channels. Enter menu 1 st and press [ ] key to start scanning. When you have started scanning, pr...

  • Page 38

    32 33 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 th to set tx power. High: 4w low: 0.5w, when you select low ...

  • Page 39

    32 33 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 th to set tx power. High: 4w low: 0.5w, when you select low ...

  • Page 40

    34 35 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 c...

  • Page 41

    34 35 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 c...

  • Page 42

    36 37 18) power-on display setting (opn.Set&vlt&pon.Msg---menu 20&21&22) functions: choose power-on display mode and edit power-on message enter menu 20 th to set opn.Set. Default: off. Off: display model version dc: battery power voltage msg: power-on message enter menu 21 st to check battery volta...

  • Page 43

    36 37 18) power-on display setting (opn.Set&vlt&pon.Msg---menu 20&21&22) functions: choose power-on display mode and edit power-on message enter menu 20 th to set opn.Set. Default: off. Off: display model version dc: battery power voltage msg: power-on message enter menu 21 st to check battery volta...

  • Page 44

    38 39 ctcss tone frequency (hz) 67.0 8.25 100.0 123.0 151.4 171.3 189.9 210.7 250.3 69.3 85.4 103.5 127.3 156.7 173.8 192.8 218.1 254.1 71.9 88.5 107.2 131.8 159.8 177.3 196.6 225.7 - 74.4 91.5 110.9 136.5 162.2 179.9 199.5 229.1 - 79.7 97.4 118.8 146.2 167.9 186.2 206.5 241.8 - 77.0 94.8 114.8 141....

  • Page 45

    38 39 ctcss tone frequency (hz) 67.0 8.25 100.0 123.0 151.4 171.3 189.9 210.7 250.3 69.3 85.4 103.5 127.3 156.7 173.8 192.8 218.1 254.1 71.9 88.5 107.2 131.8 159.8 177.3 196.6 225.7 - 74.4 91.5 110.9 136.5 162.2 179.9 199.5 229.1 - 79.7 97.4 118.8 146.2 167.9 186.2 206.5 241.8 - 77.0 94.8 114.8 141....

  • Page 46

    40 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 st /32 nd to start ctcss/dcs searching. I...

  • Page 47

    40 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 st /32 nd to start ctcss/dcs searching. I...

  • Page 48: Advanced Functions

    42 43 advanced functions 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 ...

  • Page 49: Advanced Functions

    42 43 advanced functions 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 ...

  • Page 50

    45 44 tone calling (1750hz tone) to access a repeater, press 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 releas...

  • Page 51

    45 44 tone calling (1750hz tone) to access a repeater, press 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 releas...

  • Page 52

    46 47 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 whe...

  • Page 53

    46 47 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 whe...

  • Page 54: Optional Signalings

    User's manual optional signalings remote kill, stun, activate and revive 48 clone state. The “clone” will be heard, lcd displays “clone” 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, ...

  • Page 55: Optional Signalings

    User's manual optional signalings remote kill, stun, activate and revive 48 clone state. The “clone” will be heard, lcd displays “clone” 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, ...

  • Page 56: Optional Signalings

    51 50 dtmf part click in sequence “program•optional features•optional signal•dtmf” 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: ...

  • Page 57: Optional Signalings

    51 50 dtmf part click in sequence “program•optional features•optional signal•dtmf” 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: ...

  • Page 58

    53 52 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 dtmf call with the transceiver first method 1) 2) power on, then select the channel with dtmf signal press [ ] key, lcd displays “call/dtmf?”, then press [ ] – [ ] key...

  • Page 59

    53 52 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 dtmf call with the transceiver first method 1) 2) power on, then select the channel with dtmf signal press [ ] key, lcd displays “call/dtmf?”, then press [ ] – [ ] key...

  • Page 60

    55 54 make msk call with the transceiver 1) 2) power on, then select the channel with msk signal press [ ] key, lcd displays “call/dtmf?”, then press [ ] – [ ] keys to make call with the desired call list message. If the corresponding call list has not been edited, it will sound “du”. E.G.: program ...

  • Page 61

    55 54 make msk call with the transceiver 1) 2) power on, then select the channel with msk signal press [ ] key, lcd displays “call/dtmf?”, then press [ ] – [ ] keys to make call with the desired call list message. If the corresponding call list has not been edited, it will sound “du”. E.G.: program ...

  • Page 62

    57 56 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: 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 ...

  • Page 63

    57 56 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: 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 ...

  • Page 64

    59 58 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 the remote kill status; radio cannot send or receive signals. If the radio ...

  • Page 65

    59 58 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 the remote kill status; radio cannot send or receive signals. If the radio ...

  • Page 66

    61 60 remote un-stun, the radio will quit the remote stun status and enter normal operation. 1) 2) simple version don’t have this function dtmf version a. Click in sequence “program → optional features → optional signal → dtmf → remote kill/stun code” to input your desired remote kill/stun code b. I...

  • Page 67

    61 60 remote un-stun, the radio will quit the remote stun status and enter normal operation. 1) 2) simple version don’t have this function dtmf version a. Click in sequence “program → optional features → optional signal → dtmf → remote kill/stun code” to input your desired remote kill/stun code b. I...

  • Page 68: Technical Parameters

    User's manual technical parameters 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. 62 www.Maas-elektronik.Com.

  • Page 69: Technical Parameters

    User's manual technical parameters 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. 62 www.Maas-elektronik.Com.

  • Page 70: Technical Parameters

    Frequency range channel no. Frequency stability antenna antenna impedance operating voltage mode of operation dimensions (wxhxd) general transmitter rf sensitivity audio power audio distortion intermediation selectivity spurious rejection blocking receiver 65 64 technical parameters note: specificat...

  • Page 71: Technical Parameters

    Frequency range channel no. Frequency stability antenna antenna impedance operating voltage mode of operation dimensions (wxhxd) general transmitter rf sensitivity audio power audio distortion intermediation selectivity spurious rejection blocking receiver 65 64 technical parameters note: specificat...

  • Page 72

    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 perfor...