Maycom MH-430 Mounting instructions

MINI HAND HELD TYPE
UHF TRANSCEIVER
USER'S OPERATION MANUAL
MODEL : MH-430

CONTENTS
PAGE
OPTION SETTING MODE...................................................................
DESCRIPTION OF FEATURES............................................................
-TOP PANEL FEATURES.....................................................................
-SIDE AND BACK PANEL FEATURES.............................................
-FRONT PANEL FEATURES...............................................................
-DISPLAY PANEL FEATURES............................................................
BATTERY PACK INSTRUCTION........................................................
TO RECEIVE............................................................................................
TO TRANSMIT........................................................................................
SPECIFICATION.......................................................................................
CTCSS TONE TABLE............................................................................

OPTION SETTING MODE
Press and hold "FUNC" button under the condition of Power off, and
then turn on the radio. To enter each option setting mode, press "FUNC
+ or " button.
1. Setting of Time-Out-Timer
If transmitting is continued over than fixed time, this feature is used
to cut off the transmitting compulsorily.
Display of Operating in Time-Out-Time setting mode.
To change the setting time, press the " or " button.
2. Setting of Busy Channel Lock Out
When a signal is receiving at the radio, this feature is used to
prohibit the transmitting.
Display of Operating in Busy Channel Lock Out Setting Mode.
If you press the " or " button in this setting mode, Busy
Channel Lock Out will toggle and the changed contents will appear
on the LCD.
4

NOTE : If you press "PTT" button on operating of Busy Channel
Lock Out, error message will appear on the LCD and
your radio will stay in the receiving mode.
3. Setting of TX Delay Option
In the CTCSS Tone Squelch option mode, this feature allows to
keep transmitting mode in order to prevent Squelch tail when the
"PTT" button is released.
Display of TX Delay Option Setting Mode.
If you press the " or " button in this setting mode, TX delay
option will toggle and the changed contents will appear on the LCD.
4. SCAN Delay Time
This feature allows to stop the scanning for the fixed time when a
signal is receiving at the radio during the scanning process after
that scanning process will continue.
Display of Operating SCAN Delay Time Mode
If you press the " or " button in this setting mode, scan time
will delay(or shorten) 1 second per press the button and changed
contents will appear on the LCD.
5. Setting of Power Save mode
This feature allows to increase the useful life of your battery
significantly.
5

Display of Operating Power save On/Off setting Mode.
If you press the " or " button in this setting mode, power save
On/Off will toggle on the LCD.
NOTE : In the option setting mode,
A. If you hold "FUNC" button and then press " or " button,
the next(previous) setting mode will appear on the LCD.
B. If you press the "PTT" button, all changed contents will be
stored and the radio will return for normal operation.
C. Other buttons located on the front of the radio will not
operate. If you press these buttons, error beep tone will sound.
DESCRIPTION OF FEATURES
Top Panel Features
1. Power On/Off, Volume
Turn the Volume switch clockwise to turn power on and set desired
volume. Turn the Volume button counter-clockwise to turn power off.
6

2. Squelch
This control is to cut off or eliminate receiver background noise in
the absence of an incoming signals. For maximum receiver
sensitivity, it is desired that the control be adjusted only to the point
where the receiver background on ambient background noise is
eliminated. The incoming signals that are then received will be
stronger that the background noise.
3. Antenna
This antenna provides good performance given it's overall size.
4. Microphone and Speaker Jack
Jack is for connection of optional speaker microphone accessory.
BTL(Bridge Tied Load) Amplifier is for this radio. If you want to use
External Speaker/MIC for this radio, Ground Devide External
Speaker/MIC should be used.
NOTE : If you use common Ground External Speaker/MIC for this
radio, the radio would be out of order due to burning of
circuit. Therefore, we would like to recommend you to use
our own External Speaker/MIC for this radio. If you want to
use another maker's External Speaker/MIC which you have
for this radio, please ask the shop if you may use your
External Speaker/MIC or not.
Dust Cover : When Speaker/MIC are not being used, this
prevents dirt and moisture from getting inside the radio.
Side and Back Panel Features
7

1. Push-To-Talk(PTT) Button
Press the "PTT" button and the transmitter is activated : you can
now send a message. To receive, release the "PTT" button.
2. Function(FUNC) button
This button, when used in conjunction with the buttons in the front
panel, allows for access of each function.
Press and hold "FUNC" button in normal mode(not memory channel
mode and Call channel mode), then two small seven-segments
indicates stored memory channel number. But, if you do not press
"FUNC" button, these segments indicates current transmitting/
receiving channel number.
3. Belt Clip
Allows for easy of carrying while attached to users belt.
4. D.C Jack
Allows for using external D.C Wall Charger.
Front Panel Features
1. MO, Fr/Ch
1) MO(Monitor)
Press and hold the "MO(Monitor)" button in the receiving mode,
and then the Audio will sound until the "MO" button will be
released. If a signal is not correct call in the CTCSS option mode,
the Audio will sound during pressing and holding the "MO" button.
If the "MO" button is pressed over than one second, R/TX
Condition and SCAN Skip Condition will appear on the LCD per one
second. But, they will not appear on the LCD in the setting mode.
8

Display of RX Tone.
Display of TX Tone.
Display of SCAN Skip Condition.
2) Fr/Ch(Selection of Frequency or Channel)
If you press the "FUNC + MO(Fr/Ch)" button when Frequency is
displayed on the LCD, Channel No. will appear on the LCD. Press
the "FUNC + MO(Fr/Ch)" button once again, Frequency will appear
on the LCD.
Display of Frequency(RX/TX Channel).
The last 2 small segments will show memoried channel number,
but balance 7 big segments will show RX/TX frequency.
9

Display of Channel(RX/TX Channel)
The last 2 small segments will show memoried channel number
and balance 7 big segments will also show RX/TX channel
number.
2. Channel Down()/TS Button
1) Channel Down() button
Press the "" button to arrow to move to a lower Channel than
is currently shown on the LCD.
2) TS(TONE Number Selection) Button
Press "FUNC + DOWN(TS)" button in the receiving mode(not Scan
/Dual Watch Mode). If the CTCSS option Board is installed in the
set, you can enter the Channel RX/TX setting mode. If not,
the error beep tone will sound.
Display of CTCSS RX Tone setting mode
In the above condition, press the "FUNC + or " button to
enter the TX Tone setting mode.
Display of CTCSS TX Tone setting mode
10

In the above condition, press the " or " button to increase
(decrease) Tone Frequency(Tone Channel No.). If you press and
the hold the " or " button over than one second, Tone
Frequency(Tone Channel No.) will increase(decrease) rapidly.
If you press the PTT button, all changed contents will be stored
and the radio will turn to normal operation. If you press any other
buttons on the front cabinet, the error beep tone will sound.
3. Channel Up(), TO Button
1) Channel Up() button
Press the "" button to arrow to move a higher Channel than
is currently shown on the LCD.
2)TO(TONE) Button
To activate, press the „FUNC + UP(TO)“ button in the receiving
mode(not Scan/Dual Watch Mode), the Tone option will be on(if
tone option is off, „TSQ“ will appear on the LCD).
If the CTCSS option Board is not installed in the set, the error
beep tone will sound when you press the „FUNC + UP(TO)“
button in the receiving mode(not Scan/Dual Watch Mode)
4. Lamp( ), BP(Beep) Button
1) Lamp() Button
Press the "" button, the lamp will stay on for four seconds, after
which it will turn itself off automatically. If you press another button
on the front cabinet when the lamp is on, the lamp will stay on
for four second from that time. If you press the "" button over
than one second, the lamp will stay on until you press the ""
button once again.
2) Bell feature
To activate : Press and hold the lamp button and turn the power
on. The " " will appear on the LCD. Bell melody will sound
and this feature will release(" " will disappear on the LCD.)

To deactivate : Press the "PTT" button.
3) BP(Beep) Button
This feature gives the user an audible confirmation through a short
beep tone that the radio has been turned on. The MH-430 comes
with this feature already turned on. If you would like to deactivate
this feature, press "FUNC + LAMP(BP)" button. To reactivate the
"Beep" feature, repeat the above process.
When "Beep" feature is off, the key beep tone and the error beep
tone will not sound.
NOTE : Bell Melody does not have concern with Beep tone.
11

5. MR, MW Button
1) MR(Memory Channel) Button
A. TX/RX in the memory channel
To access the stored channel No. in the memory, press the
"MR" button, and then select the channel No. you want to
access by using " or " button. The stored channel
No. will appear at the 2 small segments on the LCD to
indicate that this feature is currently activated. If you press "C"
button, the radio will enter the Call channel mode.
Display of Memory channel.
To re-activate normal condition, press the "MR" button once
again, and then the used last channel No. before memory
channel mode will appear on the LCD.
To change the channels stored within a memory location ;
- Press "FUNC + MR(MW)" button, the "MR" icon and 2
signal segments on the LCD will twinkle. (If memory location
is empty, CH 1 will appear.)
Display of stored TX/RX channel number re-setting
- Press the " or button to select the RX/TX channel
No. and then press the "PTT or MR" button.
- If you want to delete the stored channel No. at the memory
location, press the "FUNC" button over than two seconds.
To Re-set the Memory channel Scan On/Off condition ;
- Press the "FUNC + or " button, the "MR" icon on the
LCD will twinkle.
12

Display of Memory channel Scan On/Off condition re-setting
- Press the " or button, the memory channel scan skip
On/Off will toggle.
- Press the "PTT or MR" button to store the changed contents.
NB : - If you press the "FUNC+ or " button, the radio will
return to stored TX/RX channel number re-setting mode.
- If you press the "FUNC" button over than two seconds, the
stored channel will delete and the radio will return to normal
operation.
2) MW(Memory Channel Writing) Button
To store the channels in the memory locations ;
- Press the "MR" button.
- Select the memory location by using " or button.
- Press the "MR" button to return to the normal operation
- Select the channel you want to store by using " or " button.
- Fix the CTCSS Tone On/Off, CTCSS Tone Frequency.
- Press the "FUNC + MR(MW)" button.
6. SC, DW Button
1) SC(SCAN) Button
To Activate : Press the "SC" button not in the TONE Frequency
Setting Mode and Dual Watch Mode, the radio will start the
scanning process and stopping at any channel that is busy with
signals being communicated. It will remain on that channel during
scan delay time and reactivate scanning.
- If you want to stop scanning process, simply press the "PTT" button.
- During the scanning process, the skipped channel will not be
scanned.
- d1(dot 1) on the LCD will blink per 0.5 second.

- During the Down(Up) scanning process, press the "()"
button, then scanning direction will be changed to Down(Up)
scanning process.
- If a signal is receiving at a certain channel in the CTCSS option
mode, the scanning process will not stop if the TONE does not
match with the receiving signal.
- If you press the "FUNC" button at stopping channel during the
scanning process, this channel will be deleted in the next
scanning process.
13

Display of Delete message
NOTE : The deleted channel will be recovered when the radio will
be On/Off.
If only one channel will remain because of the deletion of channel
in the scanning process, the scanning process will stop and
"EMPTY" will appear on the LCD.
Display of EMPTY message
NOTE : Other buttons located on the front of the radio will not
operate. If you press these buttons, error beep tone will
sound.
2) Dual Watch Operation
To operate Dual Watch :
(1) Not in the Tone Frequency Setting Mode or Scan Mode,
select the channel in which you want to monitor, which we
will refer to as your "A Channel".
(2) Press the "FUNC + SC/DW" button, then "DW" will appear
on the LCD.
(3) Select the "B channel" in which you want to monitor. Once
"B channel" has been selected, the radio will begin its dual
watch monitoring.
Display of Dual Watch Feature.
14

To turn off the "Dual Watch" Channel, simply press the 'FUNC +
SC/DW" button or press the "PTT" button. Note that the radio will
return to the "A" channel for normal operation.
If you press the "FUNC + SC/DW" button or press the "PTT"
button when a signal is receiving on the channel "A" or "B", the
Dual Watch feature will be turn off on the "A" or "B".
In the CTCSS Option mode, even though a signal is receiving at
A(B) channel, the A(B) channel will move to B(A) channel if the
TONE does not match with the receiving signal.
If a signal is receiving at A channel, which will be kept until the
signal is disappear. But, if a signal is receiving at B channel,
which will be changed to A channel to check the signal of A
channel per 3 seconds.
Even though a signal is disappear at A(B) channel, which will be
remaining there to check another receiving signal during scan delay
time. After that A(B) channel will be changed to other channel.
If you press the " or " button when a signal is receiving at A
channel in Dual Watch feature, error tone will sound. But, if you
press the " or " button when there is no receiving signal or
there is a receiving signal at B channel, B channel will move to
higher(lower) channel than is currently chose the channel. In dual
watch feature, power save function does not operate.
7. C, LOCK
1) C (Call) Button
To activate, press the "C" button in the receiving mode including
Memory channel mode, Scan Mode and Dual Watch. Call channel
No.(Frequency) is fixed as CH 38 (Frequency 434.000MHz), which
is not changeable.
Display of Call channel No.(Frequency)
To De-activate, press the "C" button once again.

NOTE : - If you press "C" button in the Setting mode, current data
will be stored and change to Call Mode.
- If you press "C" button in Scan/Dual Watch mode
Scanning/Dual Watch process will stop and change to Call
mode.
15

2) LOCK
To Activate : Press the "FUNC + C(LOCK)" button. The " "
will appear on the LCD to indicate that this feature is currently
activated.
To De-Activate : Repeat process described in "To Activate".
The " " will disappear from the LCD.
8. Electric Microphone
Front mounted, electrostatic condenser microphone for clear high
quality transmission power. You should hold the radio 2-4 inches
from your mouth and speak in a normal voice.
9. Speaker
High quality, impact resistant output speaker for clear output
reception.
10. Battery Case
See "Batteries" for installation instruction.(Page 18)
Display Panel Features

1. TX
Indicates that radio is in the "transmit" mode.
2. Function Mode
Indicates the "FUNC" button has been selected.
3. DW
Indicates that the "Dual Watch" feature has been activated.
4. TSQ
Indicates that Tone Squelch" feature has been activated.
5. PS
Indicates that the radio is in the "Battery Save" mode.
16

6. Lock
Indicates the "Key Lock" feature has been activated.
7. Beep
Indicates that "Beep" tone confirmation is on.
8. Bell
Indicates that "Bell" feature has been activated.
9. Memory channel Indicator
Display the memorized channel number.
10. d2 (Dot No. 2)
This dot is used to display the "CTCSS" Frequency. (Unit : Hz)
11. d1 (Dot No. 1)
This dot is used to display the RX or TX Frequency. (Unit : MHz)
12. Channel(Frequency) Indicator
Display the channel No. or Frequency No.
13. Signal strength indicator
The radio incorporates a tenth segment incoming signal and power
output meter in the LCD. When receiving a signal, the meter will
indicate how strong the signal is. A week signal will be indicated by
one or two segments, while a very strong signal will have 8 to 10
segments. When transmitting, the letter "TX" will appear on the LCD
and 10 segments will appear on the LCD.
14. Battery remainder level meter
If you want see the battery level when you press the "PTT" button,
press the monitor button with PTT button.
15. Battery
Indicates batteries are getting low. If the battery level is lower than
the standard point, Battery Level Indicator will twinkle.