Maas AHT-28-V/AHT-78-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 AHT-28-V/AHT-78-U.
Main Functions Single band, dual display, dual standby A/B band independent operation 2x128 channels storage and scanning FM radio and 25 stations memory www.maas-elektronik.com Wide/Narrow band selectable Welcome to use two-way radio VOX 0~9 grade setting Chinese/English voice prompt CTCSS/DCS and scanning www.maas-elektronik.
Main Functions Single band, dual display, dual standby A/B band independent operation 2x128 channels storage and scanning FM radio and 25 stations memory www.maas-elektronik.com Wide/Narrow band selectable Welcome to use two-way radio VOX 0~9 grade setting Chinese/English voice prompt CTCSS/DCS and scanning www.maas-elektronik.
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 2 3 3 5 5 6 7 7 8 9 10 10 GETTING FAMILIAR 12 Radio Illustration LCD Display Keypad Functions 12 14 16 MODEL VERSION WORKING MODE 19 20 Frequency Mode (VFO) Frequency-Channel Mode (MR) Channel Mode (CH) FM Radio
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 2 3 3 5 5 6 7 7 8 9 10 10 GETTING FAMILIAR 12 Radio Illustration LCD Display Keypad Functions 12 14 16 MODEL VERSION WORKING MODE 19 20 Frequency Mode (VFO) Frequency-Channel Mode (MR) Channel Mode (CH) FM Radio
User's Manual Tone coder & Tone Search Scanning & Tone calling VFO Step setting Wide/Narrow Band Selecting Voice Mode and Scrambler 37 40 41 41 ADVANCED FUNCTIONS 42 PTT ID setting Emergency Alert Keypad Lock setting Reverse Frequency Tone Calling (1750Hz) Channel Storage/Delete FM Radio Function Wire Clone 42 43 43 43 44 44 46 47 OPTIONAL SIGNALINGS 50 DTMF Part MSK Part 2-Tone Part 5-Tone Part REMOTE KILL, STUN, ACTIVATE AND REVIVE TECHNICAL PARAMETERS USING TIPS UNPACKING AND CHECKING EQUIPMENT
User's Manual Tone coder & Tone Search Scanning & Tone calling VFO Step setting Wide/Narrow Band Selecting Voice Mode and Scrambler 37 40 41 41 ADVANCED FUNCTIONS 42 PTT ID setting Emergency Alert Keypad Lock setting Reverse Frequency Tone Calling (1750Hz) Channel Storage/Delete FM Radio Function Wire Clone 42 43 43 43 44 44 46 47 OPTIONAL SIGNALINGS 50 DTMF Part MSK Part 2-Tone Part 5-Tone Part REMOTE KILL, STUN, ACTIVATE AND REVIVE TECHNICAL PARAMETERS USING TIPS UNPACKING AND CHECKING EQUIPMENT
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 UNPACKING AND CHECKING EQUIPMENT to use AHT-28-V/AHT-78-U. 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.
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 UNPACKING AND CHECKING EQUIPMENT to use AHT-28-V/AHT-78-U. 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.
CHARGING BATTERY PACK User's Manual Charging Precaution 7.4V 1600 CHARGING BATTERY PACK INSTALLATION OF ACCESSORIES www.maas-elektronik.
CHARGING BATTERY PACK User's Manual Charging Precaution 7.4V 1600 CHARGING BATTERY PACK INSTALLATION OF ACCESSORIES www.maas-elektronik.
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). Charging Operation 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).
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). Charging Operation 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).
Antenna Installation Installing Belt Clip PUSH PUSH SP SP M IC M IC Picture 3 Picture 4 Picture 5 CALL F F PT T PT T MON I MON I A/B 1 SCAN 4 PWR 7 LED * LOCK A/B X 2 5 PRI SQL 6 1 SCA DW FM RAD LOR ANI N IO EP 8 CO 0 3 VO 4 PWR 9 BE EXIT # T-R Picture 3 08 Picture 6 CALL 7 LED * LOCK X 2 PRI 5 SQ 8 CO 0 L LOR ANI 3 VO 6 DW FM RAD IO EP 9 BE EXIT # T-R Picture 4 09
Antenna Installation Installing Belt Clip PUSH PUSH SP SP M IC M IC Picture 3 Picture 4 Picture 5 CALL F F PT T PT T MON I MON I A/B 1 SCAN 4 PWR 7 LED * LOCK A/B X 2 5 PRI SQL 6 1 SCA DW FM RAD LOR ANI N IO EP 8 CO 0 3 VO 4 PWR 9 BE EXIT # T-R Picture 3 08 Picture 6 CALL 7 LED * LOCK X 2 PRI 5 SQ 8 CO 0 L LOR ANI 3 VO 6 DW FM RAD IO EP 9 BE EXIT # T-R Picture 4 09
Installing External Micro/Speaker User's Manual F A/B 1 SCAN 4 PWR 7 LED LOCK 2 PRI 5 SQL 8 COLOR 3 VOX 6 DW 9 BEEP FM RADIO 0 ANI T-R EXIT Picture 7 Wrist Strap Installation GETTING FAMILIAR PUSH SP M IC www.maas-elektronik.
Installing External Micro/Speaker User's Manual F A/B 1 SCAN 4 PWR 7 LED LOCK 2 PRI 5 SQL 8 COLOR 3 VOX 6 DW 9 BEEP FM RADIO 0 ANI T-R EXIT Picture 7 Wrist Strap Installation GETTING FAMILIAR PUSH SP M IC www.maas-elektronik.
RADIO ILLUSTRATION POWER/VOLUME DIAL This control toggle the ANTENNA Connect the supplied transceiver’s power on/off and adjust the audio volume level. antenna here. CALL Activates T-CALL (1750Hz) for repeater access and transmit DTMF and 2/5 tone signaling. BUSY/TX SPEAKER The indicator turns green The internal speaker is during receive and turns located here. red during transmit/ CALL MIC/SP PTT SP Press it to transmit and release it to receive after your transmission is completed.
RADIO ILLUSTRATION POWER/VOLUME DIAL This control toggle the ANTENNA Connect the supplied transceiver’s power on/off and adjust the audio volume level. antenna here. CALL Activates T-CALL (1750Hz) for repeater access and transmit DTMF and 2/5 tone signaling. BUSY/TX SPEAKER The indicator turns green The internal speaker is during receive and turns located here. red during transmit/ CALL MIC/SP PTT SP Press it to transmit and release it to receive after your transmission is completed.
LCD DISPLAY Icons 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.
LCD DISPLAY Icons 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.
KEYPAD FUNCTIONS [ Press key Press and turn on the radio ] [ [ ] [ ] [ ] [ ] Enter menu Switch the mode/confirm A or B the setting frequency to be the “Operating” Band Upper menu Lower menu Switch VFO item, channel item, channel mode and or frequency or frequency MR mode/exit the setting Enter reset mode Switch CH mode and VFO mode [ ] No action [ ] [ ] [ ] [ ] Press key Frequency/ Channel No. entry “1” Frequency/ Channel No. entry “2” Frequency/ Channel No.
KEYPAD FUNCTIONS [ Press key Press and turn on the radio ] [ [ ] [ ] [ ] [ ] Enter menu Switch the mode/confirm A or B the setting frequency to be the “Operating” Band Upper menu Lower menu Switch VFO item, channel item, channel mode and or frequency or frequency MR mode/exit the setting Enter reset mode Switch CH mode and VFO mode [ ] No action [ ] [ ] [ ] [ ] Press key Frequency/ Channel No. entry “1” Frequency/ Channel No. entry “2” Frequency/ Channel No.
MODEL VERSION User's Manual The AHT-28-V/AHT-78-U has 3 versions in total: 1) Simple version Set Menu 20th 2) DTMF version 3) 5T&2T version Power-on Display OFF, you will find your AHT-28-V/AHT-78-U model version information when you switch the transceiver power on. MODEL VERSION 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.
MODEL VERSION User's Manual The AHT-28-V/AHT-78-U has 3 versions in total: 1) Simple version Set Menu 20th 2) DTMF version 3) 5T&2T version Power-on Display OFF, you will find your AHT-28-V/AHT-78-U model version information when you switch the transceiver power on. MODEL VERSION 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.
5) MENU Mode WORKING MODE Press [ 1) Frequency Mode (VFO) Under this mode, you can use [ ] key to enter MENU mode, there are 34 items in total. Please see SET MENU MODE. Page 22 ]/[ ] key to change the frequency or input the frequency by keypad directly and store channels. 6) Reset Mode Press [ 2) Frequency-Channel Mode (MR) ] key and switch the power on to enter Reset mode, then press [ ] key to enter. When you have stored a memory channel at least and under VFO mode, press [ ] 1.
5) MENU Mode WORKING MODE Press [ 1) Frequency Mode (VFO) Under this mode, you can use [ ] key to enter MENU mode, there are 34 items in total. Please see SET MENU MODE. Page 22 ]/[ ] key to change the frequency or input the frequency by keypad directly and store channels. 6) Reset Mode Press [ 2) Frequency-Channel Mode (MR) ] key and switch the power on to enter Reset mode, then press [ ] key to enter. When you have stored a memory channel at least and under VFO mode, press [ ] 1.
SET MENU MODE No. No. 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 LOW / HIGH High/Low TX Power 05 SQL 0-9 SQL level setting 06 D.
SET MENU MODE No. No. 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 LOW / HIGH High/Low TX Power 05 SQL 0-9 SQL level setting 06 D.
No. LCD Display Available Values Description of Function 30 N/W WIDE/NARROW Wide/Narrow Band 31 SEEK 67.0 / CTCSS Scanning 32 SEEK D023N / DCS Scanning 33 SCR.NO 1-8 Voice Scrambler (Only for 5T&2T version) Voice Mode 34 APRO OFF / COMP / SCRA (Only for 5T&2T version) Menu Operation 1) Under standby mode, press [ ] to enter menu setting, LCD displays “MENU”. 2) Press [ ] or [ ] to select the desired menu item, LCD display current setting of selected item.
No. LCD Display Available Values Description of Function 30 N/W WIDE/NARROW Wide/Narrow Band 31 SEEK 67.0 / CTCSS Scanning 32 SEEK D023N / DCS Scanning 33 SCR.NO 1-8 Voice Scrambler (Only for 5T&2T version) Voice Mode 34 APRO OFF / COMP / SCRA (Only for 5T&2T version) Menu Operation 1) Under standby mode, press [ ] to enter menu setting, LCD displays “MENU”. 2) Press [ ] or [ ] to select the desired menu item, LCD display current setting of selected item.
Item Item No.
Item Item No.
Item Item No. Name Enter item Screen Display Select parameter Parameter Explanation 26) RX tone coder + Press [ ] or [ ] to select available values OFF / QT / DCS 27) TX tone coder + Press [ ] or [ ] to select available values OFF / QT / DCS 28) Shift direction + Press [ ] or [ ] to select available values +/- 29) VFO step + Press [ ] or [ ] to select available values 5K / 6.25K / 10K...
Item Item No. Name Enter item Screen Display Select parameter Parameter Explanation 26) RX tone coder + Press [ ] or [ ] to select available values OFF / QT / DCS 27) TX tone coder + Press [ ] or [ ] to select available values OFF / QT / DCS 28) Shift direction + Press [ ] or [ ] to select available values +/- 29) VFO step + Press [ ] or [ ] to select available values 5K / 6.25K / 10K...
2) Priority Transmit (TX.SEL---MENU 2) DETAILED FUNCTION DESCRIPTIONS Functions: The AHT-28-V/AHT-78-U allows you to transmit on the sub band even if you 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. st Enter Menu 1 and press [ ] key to start scanning. When you have started scanning, press [ ]/[ ] key to change direction.
2) Priority Transmit (TX.SEL---MENU 2) DETAILED FUNCTION DESCRIPTIONS Functions: The AHT-28-V/AHT-78-U allows you to transmit on the sub band even if you 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. st Enter Menu 1 and press [ ] key to start scanning. When you have started scanning, press [ ]/[ ] key to change direction.
4) TX Power setting (POW---MENU 4) Functions: you can select high/low TX power according to your talking environment 7) LED Display Mode (LED---MENU 7) Function: select the LED/Keypad Lamp mode. and need. When you store memories, you can store High and Low power Enter Menu 7th to select LED display mode. Default: AUTO. settings separately in each memory. ON: LED display lights all the time. Enter Menu 4th to set TX power.
4) TX Power setting (POW---MENU 4) Functions: you can select high/low TX power according to your talking environment 7) LED Display Mode (LED---MENU 7) Function: select the LED/Keypad Lamp mode. and need. When you store memories, you can store High and Low power Enter Menu 7th to select LED display mode. Default: AUTO. settings separately in each memory. ON: LED display lights all the time. Enter Menu 4th to set TX power.
11) Transmitter Time-Out Timer (TOT---MENU 11) Functions: the TOT feature provides a safety switch which limits transmission to a 14) Dual Watch/Monitor (DW---MENU 15) Functions: Dual Watch feature makes the transceiver can monitor the calling signal 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.
11) Transmitter Time-Out Timer (TOT---MENU 11) Functions: the TOT feature provides a safety switch which limits transmission to a 14) Dual Watch/Monitor (DW---MENU 15) Functions: Dual Watch feature makes the transceiver can monitor the calling signal 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.
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 20) Display Channel Name (DIS.NAME&CH.NAME---MENU 23&24) Functions: switch channel name display ON/OFF and edit channel name under MR/CH Enter Menu 20th to set OPN.SET. Default: OFF. mode. OFF: display model version Enter Menu 23rd to switch display channel name ON/OFF.
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 20) Display Channel Name (DIS.NAME&CH.NAME---MENU 23&24) Functions: switch channel name display ON/OFF and edit channel name under MR/CH Enter Menu 20th to set OPN.SET. Default: OFF. mode. OFF: display model version Enter Menu 23rd to switch display channel name ON/OFF.
CTCSS TONE FREQUENCY (Hz) 38 DCS CODE 67.0 69.3 71.9 74.4 77.0 79.7 023 074 172 265 371 503 662 8.25 85.4 88.5 91.5 94.8 97.4 025 114 174 266 411 506 664 100.0 103.5 107.2 110.9 114.8 118.8 026 115 205 271 412 516 703 123.0 127.3 131.8 136.5 141.3 146.2 031 116 212 274 413 523 712 151.4 156.7 159.8 162.2 165.5 167.9 032 122 223 306 423 526 723 171.3 173.8 177.3 179.9 183.5 186.2 036 125 225 311 431 532 731 189.9 192.8 196.
CTCSS TONE FREQUENCY (Hz) 38 DCS CODE 67.0 69.3 71.9 74.4 77.0 79.7 023 074 172 265 371 503 662 8.25 85.4 88.5 91.5 94.8 97.4 025 114 174 266 411 506 664 100.0 103.5 107.2 110.9 114.8 118.8 026 115 205 271 412 516 703 123.0 127.3 131.8 136.5 141.3 146.2 031 116 212 274 413 523 712 151.4 156.7 159.8 162.2 165.5 167.9 032 122 223 306 423 526 723 171.3 173.8 177.3 179.9 183.5 186.2 036 125 225 311 431 532 731 189.9 192.8 196.
Function 2: TONE Search Scanning 23) Wide/Narrow band selecting (N/W---MENU 30) In operating situations where you don’t know the CTCSS/DCS tone being used by Functions: setting of wide/narrow bandwidth another station or stations, you can command the radio to listen to the incoming signal Enter Menu 30th to set bandwidth. and scan in search of the tone being used. Available Values: Wide---25kHz/Narrow---12.5kHz Enter Menu 31st/32nd to start CTCSS/DCS searching.
Function 2: TONE Search Scanning 23) Wide/Narrow band selecting (N/W---MENU 30) In operating situations where you don’t know the CTCSS/DCS tone being used by Functions: setting of wide/narrow bandwidth another station or stations, you can command the radio to listen to the incoming signal Enter Menu 30th to set bandwidth. and scan in search of the tone being used. Available Values: Wide---25kHz/Narrow---12.5kHz Enter Menu 31st/32nd to start CTCSS/DCS searching.
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 √). You can input character in BOT and EOT.
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 √). You can input character in BOT and EOT.
2) Press [ 5) 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 [ ]+[ ][ ] or press [ ]+[ ], then press ] to enter 3) Press [ ] to choose CTCSS mode, LCD displays C-CDC 67.
2) Press [ 5) 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 [ ]+[ ][ ] or press [ ]+[ ], then press ] to enter 3) Press [ ] to choose CTCSS mode, LCD displays C-CDC 67.
7) FM RADIO FUNCTION except [ ] and [ ] to exit. 5) FM radio storage 1) On/off radio receiver Under standby mode, press [ display “70.00M”, then press [ ] to open FM radio function, LCD ] again, radios receiver is off. Note: under FM radio mode, if receiving the signal, the radio will be out Under FM frequency mode, press [ ] and then press[ ], the channel number for storage blinks at the right of the screen.
7) FM RADIO FUNCTION except [ ] and [ ] to exit. 5) FM radio storage 1) On/off radio receiver Under standby mode, press [ display “70.00M”, then press [ ] to open FM radio function, LCD ] again, radios receiver is off. Note: under FM radio mode, if receiving the signal, the radio will be out Under FM frequency mode, press [ ] and then press[ ], the channel number for storage blinks at the right of the screen.
clone state. The “Clone” will be heard, LCD displays “CLONE” User's Manual 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.
clone state. The “Clone” will be heard, LCD displays “CLONE” User's Manual 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.
DTMF Part OPTIONAL SIGNALINGS Click in sequence “program•Optional Features•Optional Signal•DTMF” Optional Signalings (Programmed by software) Step 1: Edit the Fast Call list via programming software, radio can store up to 10 groups This transceiver supports four optional signalings (MSK, DTMF, 2-Tone, 5-Tone). Step 2: Input the desired code into the corresponding list, 16 characters in maximum.
DTMF Part OPTIONAL SIGNALINGS Click in sequence “program•Optional Features•Optional Signal•DTMF” Optional Signalings (Programmed by software) Step 1: Edit the Fast Call list via programming software, radio can store up to 10 groups This transceiver supports four optional signalings (MSK, DTMF, 2-Tone, 5-Tone). Step 2: Input the desired code into the corresponding list, 16 characters in maximum.
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. Step 3: Input corresponding ID code in the calling list. ID code should be corresponding to the one in the CallList, e.g.
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. Step 3: Input corresponding ID code in the calling list. ID code should be corresponding to the one in the CallList, e.g.
Make MSK call with the transceiver Picture 5 and Picture 6, 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 the 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.
Make MSK call with the transceiver Picture 5 and Picture 6, 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 the 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.
Make 2-tone call with the transceiver 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: 1) Power on, then select the channel with 2-Tone signal 2) Press [ then press [ ] key, LCD displays “CALL/2T?”, ] key to transmit 2-Tone while press [ ] to transmit a single tone/Group call. If the corresponding call list has not been edited, it will sound “DU”.
Make 2-tone call with the transceiver 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: 1) Power on, then select the channel with 2-Tone signal 2) Press [ then press [ ] key, LCD displays “CALL/2T?”, ] key to transmit 2-Tone while press [ ] to transmit a single tone/Group call. If the corresponding call list has not been edited, it will sound “DU”.
This transceiver has 8 groups’ 5-Tone encoder and decoder to support the different REMOTE KILL, STUN, ACTIVATE AND REVIVE channels, the operation of calling/transmitting 5-Tone are as follows: If you want to use remote kill, stun, activate and revive, please program signalling for 1) Select the channel with 5-tone signal. current channel as DTMF and 2/5tone.
This transceiver has 8 groups’ 5-Tone encoder and decoder to support the different REMOTE KILL, STUN, ACTIVATE AND REVIVE channels, the operation of calling/transmitting 5-Tone are as follows: If you want to use remote kill, stun, activate and revive, please program signalling for 1) Select the channel with 5-tone signal. current channel as DTMF and 2/5tone.
remote un-stun, the radio will quit the remote stun status and enter code, the radio will enter the remote stun status and you will hear a sound. And normal operation. then press [PTT] and input DTMF code 12345678#, the radio will quit the remote 1) Simple version don’t have this function 2) DTMF version A. Click in sequence “program → Optional Features → Optional Signal → DTMF → Remote kill/stun code” to input your desired Remote kill/stun code stun status and enter normal operation.
remote un-stun, the radio will quit the remote stun status and enter code, the radio will enter the remote stun status and you will hear a sound. And normal operation. then press [PTT] and input DTMF code 12345678#, the radio will quit the remote 1) Simple version don’t have this function 2) DTMF version A. Click in sequence “program → Optional Features → Optional Signal → DTMF → Remote kill/stun code” to input your desired Remote kill/stun code stun status and enter normal operation.
revive it, press [ ] and input remote un-stun code 2345678, the radio will quit the User's Manual remote stun status and enter normal operation. The operation of remote kill is the same to remote stun. TECHNICAL PARAMETERS www.maas-elektronik.
revive it, press [ ] and input remote un-stun code 2345678, the radio will quit the User's Manual remote stun status and enter normal operation. The operation of remote kill is the same to remote stun. TECHNICAL PARAMETERS www.maas-elektronik.
TECHNICAL PARAMETERS Transmitter General Frequency Range Channel No. Frequency stability Antenna Antenna Impedance Operating Voltage Mode of operation Dimensions (WxHxD) Receiver RF Sensitivity Audio power Audio Distortion Intermediation Selectivity Spurious Rejection Blocking Note: Specification will be revised without notice due to technical improvement. Thank you.
TECHNICAL PARAMETERS Transmitter General Frequency Range Channel No. Frequency stability Antenna Antenna Impedance Operating Voltage Mode of operation Dimensions (WxHxD) Receiver RF Sensitivity Audio power Audio Distortion Intermediation Selectivity Spurious Rejection Blocking Note: Specification will be revised without notice due to technical improvement. Thank you.
Maas AHT-28-V/AHT-78-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 AHT-28-V/AHT-78-U.
