Maas AHT-28-V, AHT-78-U User 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.

Maas

AHT-28-V/AHT-78-U

Handheld Transceivers

User’s Manual

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 menu operation mode
Emergency alert
DTMF and remote stun/kill/activate (optional)
8 groups of scrambler, 2/5 tone, remote stun/
kill/activate (optional)

Main Functions

Reset Mode

SET MENU MODE
SHORTCUT MENU OPERATION
DETAILED FUNCTION DESCRIPTION

Scan & Scan Mode setting
Priority Transmit
VOX Level & VOX Switch
TX Power setting
Squelch Adjustment
Dual 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
Receive Saver
Auto Keypad Lock
Voice Prompt
Power-on Display setting
Repeater Shift setting
Display Channel Name

21

22
25
30

30
31
31
32
32
32
33
33
33
33
34
34
34
35
35
35
35
36
36
37

User's Manual

USING TIPS

UNPACKING AND CHECKING EQUIPMENT

www.maas-elektronik.com

Transceiver (1)

Supplied Items:

to use AHT-28-V/AHT-78-U.

05

CHARGING BATTERY PACK

1600

7.4V

Charging Precaution

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 the bottom to
remove it out---in direction of arrowhead (Picture 2).

Picture 1 Picture 2

Picture 5 Picture 6

S

P

M

I

C

P

U

S

H

S

P

M

I

C

P

U

S

H

Installing Belt Clip

User's Manual

GETTING FAMILIAR

www.maas-elektronik.com

MONI

PTT

CALL

SP

MIC

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

Press this key disables the
noise squelching action,
allowing you to hear very weak
signals near the back-ground
noise level.

MIC/SP

The jack provides connection
points for microphone audio,
earphone audio, speaker and
program cable.

Description of functions

Squelch active
Beep tone active
Receive calling ID or MSG
Scrambler active
Battery power 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 indicator
Channel number/Menu items number indicator
Busy channel indicator
Channel scanned available under CH mode

Icons