Maas AHT-28-V User Manual Download

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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

Maas

AHT-28-V/AHT-78-U

Handheld Transceivers

User’s Manual

Summary of Contents for AHT-28-V

Page 1: ...unctions 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...

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Page 3: ...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 menu operation mode Emergency al...

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Page 5: ...ual Wait Standby LED Display Mode Background Light Color Keypad Beeper setting Automatic Number Identity Transmitter Time Out Timer Busy Channel Lock Out Transmit Over Beeper Dual Watch Monitor Receiv...

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Page 7: ...User s Manual USING TIPS UNPACKING AND CHECKING EQUIPMENT www maas elektronik com...

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Page 9: ...03 UNPACKING AND CHECKING EQUIPMENT Transceiver 1 Supplied Items to use AHT 28 V AHT 78 U...

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Page 11: ...05 CHARGING BATTERY PACK 1600 7 4V Charging Precaution...

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Page 13: ...ery 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 towar...

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Page 15: ...09 Picture 5 Picture 6 SP M IC PUSH SP M IC PUSH Installing Belt Clip...

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Page 17: ...User s Manual GETTING FAMILIAR www maas elektronik com...

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Page 19: ...Press it to transmit and release it to receive after your transmission is completed MONI Press this key disables the noise squelching action allowing you to hear very weak signals near the back ground...

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Page 21: ...indicator CTCSS decoder active DCS decoder active 5 Tone signaling active 2 Tone signaling active DTMF signaling active Operating A band indicator Operating B band indicator Frequency mantissa indica...

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Page 23: ...0 Enter dual wait standby item Enter LED item Enter color item Enter beep item Enter ANI item Press key Left cursor position when editing channel name Right cursor position when editing channel name E...

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Page 25: ...odel 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 scramb...

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Page 27: ...tal Please see SET MENU MODE Page 22 6 Reset Mode Press 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...

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Page 29: ...on of Function Available Values 23B 24 25 26 27 28 29 DIS NM CHNAME C CDC R CDC T CDC S D STEP Display Channel Name Channel Name Editing TX RX Tone coder RX Tone coder TX Tone coder Shift Direction VF...

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Page 31: ...ble values VOX level 1 8 Press or to select available values High Low Press or to select available values SQL level 0 9 Press or to select available values ON OFF Press or to select available values O...

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Page 33: ...l name editing 24 TX RX tone coder 25 Press or to select available values ON OFF Press or to select available values OFF DC MSG Press or to select available values Show current voltage Press or to sel...

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Page 35: ...User s Manual DETAILED FUNCTION DESCRIPTIONS ADVANCED FUNCTIONS www maas elektronik com...

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Page 37: ...atic 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 o...

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Page 39: ...MENU 8 Functions choose LED background light color Enter Menu 8th to select background light color Default COLOR1 COLOR1 Purple COLOR2 Blue COLOR3 Orange 9 Keypad Beeper setting BEEP MENU 9 Functions...

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Page 41: ...h 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 switc...

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Page 43: ...SEEK 67 0 D023N MENU 25 26 27 31 32 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 repea...

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Page 45: ...5 152 155 156 162 165 172 174 205 212 223 225 226 243 244 245 246 251 252 255 261 263 265 266 271 274 306 311 315 325 331 332 343 346 351 356 364 365 371 411 412 413 423 431 432 445 446 452 454 455 46...

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Page 47: ...ns 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 origina...

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Page 49: ...exit KEYPAD LOCK SETTING Under standby mode press for 2S to lock or unlock the keypad will be displayed at the top of LCD when keypad is locked REVERSE FREQUENCY ON OFF Under standby mode press for 2...

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Page 51: ...7 Press or 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 cha...

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Page 53: ...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 Prep...

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Page 55: ...User s Manual OPTIONAL SIGNALINGS REMOTE KILL STUN ACTIVATE AND REVIVE www maas elektronik com...

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Page 57: ...the desired code into the corresponding list 16 characters in maximum Step 3 Choose the desired DTMF decoder from available values Code Squelch Picture 1 and Selective Call Picture 2 Step 4 Choose the...

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Page 59: ...e 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 a...

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Page 61: ...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 3MHz Step 3 Set the optional signal...

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Page 63: ...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 then select the List Num want to call and clic...

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Page 65: ...e kill status and enter 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 Fea...

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Page 67: ...ansmit 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...

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Page 69: ...User s Manual TECHNICAL PARAMETERS www maas elektronik com...

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Page 71: ...itter RF Sensitivity Audio power Audio Distortion Intermediation Selectivity Spurious Rejection Blocking Receiver 65 Note Specification will be revised without notice due to technical improvement Than...

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