Maas KCB-3000 User manual
CB-Mobil-Radio
KCB-3000
European Multi tandard Radio
with VOX Microphone
Instruction Manual
■ Multi standard CB Radio
■ Large LC-Display
■ VOX handheld microphone as standard
accessoire
■ Audio jacks for accessoire with Kenwood
standard plug at the front panel
■ Several bands selectable
(EU, EUH, EC, UK, PL, I , I2, DE, DEH)
■ 8 colours selectable for display backlight
■ 2 switchable levels of display brigthness
■ Emergency channels CH9 und CH19
■ SQ and ASQ levels separat adjustable
■ AM and FM mode
■ Indication of receive signal strength
■ Key lock function
■ DC cable with cigarette lighter plug or
cable with open leads
■ Supply from 12 V DC or 24 V DC possible
From 2020, CB radios may only be used while dri-
ving if a hands-free system is available. Violati-
ons of this regulation will now be treated as the
unauthorized use of a cell phone by a driver!
Regarding the permissions and restrictions of the
individual norms in the various european coun-
tries, please check the radio passport, which is in-
cluded in the scope of delivery. he user is solely
responsible for the selection of the permissible
norm in the country of operation.
MAIN FEATURES AND IMPORTANT NOTES
TABLE OF CONTENTS
Main features
Important note
Preparations
Installation of a CB antenna 4
Aerial Connection 4
Installation in the car 5
Power source 5
External speaker jack 6
Knobs and keys
Front panel 6
Microphone keys 6
Operation 8
On/Off 8
Channel selection 8
Transmitting 8
quelch 8
Keylock 9
LCD color 9
LCD Brightness 9
Priority Channels 9
can 9
Modulation selection 9
Using the handheld microphone
VOX function 10
Adjusting VOX Sensivity 10
Selecting VOX delay period for
handheld microphone 10
Hands-free transmission with
earphone microphone [VOX] 10
Satndard switch 11
Selection of standard [BA D] 11
Additional Information 12
Device pass 13
Persönal notes 14
3
■ Installation of a CB antenna
The antenna is one of the most critical parts in your
setup. The type of antenna and its location has a great
effect on the range of operation. Please consider the
following criteria for selection of the best location and
the installation of your antenna:
• Make sure that the antenna is designed for radio
operation on 27 MHz.
• The position of the antenna should be elevated wit-
hout any obstacles nearby.
• The aerial cable should not be damaged and the
plugs should be properly connected.
• Make sure that the antenna cable is not bent.
• The bigger the mechanical size of the antenna, the
higher the range of operation.
When you install a mobile antenna please note the
following advices:
• The antenna should be fixed in the center of a big
body-part, e.g. the truck.
• The mobile antenna coil should have the closest
possible contact with a conducting metallic surface
of the bodywork of the car.
There are other possibilities to fix the antenna onto the
car without having to drill a hole into the bodywork of
your car, e.g. mounting the antenna with a antenna hol-
der onto the gutter or the trunk. Magnetic mount an-
tennas (with an magnetic base) or windshield antennas,
which are glued onto the glass, are also alternatives.
• Please don't mount the CB antenna nearby a radio
or TV antenna to prevent interference of radio or TV
reception.
• Keep an eye on power lines running along nearby
when mounting the antenna on the roof.
• All connected cables including the antenna cable
must not exceed a length of 4.5 m.
■ Antenna Connection
Before pressing the transmit key, a suitable antenna
must be connected. The PL259 plug of the antenna
coaxila cable is connected to the SO239 socket on the
rear panel. Make sure, that all plugs are firmly tightened
and properly soldered. Insufficient connections can da-
mage the radio and will reduce the range of operation.
The antenna should be configured with the radio,
PREPARATIONS FOR OPERATION
4
otherwise a part of the transmit power will be reflected
at the antenna and will not be radiated. This reduces
the range of operation. The configuration of an antenna
to a radio, is performed by a length adjustment of the
antenna’s radial for a minimal SWR ratio which can be
measured by a SWR meter, e.g. Maas KCB-3000. After
the measurement the SWR meter should be removed
from the antenna line.
■ Installation in the car
When you want to install the radio in your vehicle, use
either the included underdash or radio compartment
mounting kit. Always mount the transceiver in a location
where the buttons are easily accessible. Other impor-
tant points to consider for a correct mounting position
are:
• roadworthiness,
• good access to the controls of the car,
• sufficient air circulation to prevent overheating of the
radio in transmit mode.
Please consider your point of view onto the display
while driving. Starting extensive solar irradiation can
also affect the readability of the display. So it is recom-
mended to check the best position before the final fi-
xing.
■ Power source
Before connecting the unit to a suitable power source
via the fused DC power cable, the device must be swit-
ched off by turning the volume control [VO ] counter-
clockwise to the very end, beyond the threshold, until
you hear a click. Then connect the two naked leads at
the end of the cable with the supply voltage of the ve-
hicle’s battery. The unit is designed to operate with 12
V or 24 V and a negative ground electrical system.
Place the cable as far as possible away from aggrega-
tes which can cause interferences. Watch for the cor-
rect polarity during the connection.
BLACK connect to - MI US (ground) of the car battery.
RED connect to the + PLUS of the vehicle’s battery.
After proper connection of the antenna and the power
source radio operation can be started.
PREPARATIONS FOR OPERATION
5
■ External speaker jack
The KCB-3000 mobile is equipped with a 3.5 mm so-
cket at the rear panel to connect an external speaker
of 4-8 ohm impedance. At 4 ohms the speaker load can
be 4 watts maximum. When the external speaker is
connected, the internal speaker of the radio is muted.
■ Frontpanel
1 - Volume control with Power-On-Off
2 - COL/DIM-Key
3 - LC-Display
4 - VOX/LOCK-Key
5 - UP-Key
6 - SQ/ASQ control
7 - Socket for speakermicrophone
(Kenwood standard)
An external loudspeaker or earphone can also be
connected individually to the 2.5 mm jack socket.
Please pay attention to the load capacity of the
loudspeaker/earphone and only set a low vo-
lume.
8 - Loadspeaker
9 - DOW -Key
10 - MODE/BA D-Key
11 - Socker for handheld microphone
12 - 9·19 Channel switch / SCA -Key
■ Keys on the VOX microphone
1 - PTT key
2 - channel UP
3 - M key
4 - channel DOW
PREPARATIONS FOR OPERATION / KNOBS AND KEYS
1
2 43
6
KNOBS AND KEYS
2 3 41 5 6
1011 9
7
7
8
OPERATION
■ On/Off
To switch on/off the radio turn the volume switch [VOL]
clockwise / counterclockwise over the threshold.
■ Channel selection
Use the channel selector keys and at the microphone
or at the radio for channel selection. The actual channel
number is displayed on the LCD.
■ ransmitting
For signal transmission, press and hold the PTT key at
the microphone. The TX symbol appears in the LCD.
For best quality, speak normally at a distance of 5–10
cm (2 - 4 inches). Speaking too loud will cause distor-
tion and makes the signal difficult to understand. While
the set is in the transmit mode there is no key entry
possible and the receiver is muted. On completion of
the transmission release the PTT key and the radio will
switch back to receiving mode.
■ Squelch
The radio is equipped with an automatic (ASQ) and a
manual squelch (SQ). Both can be adjusted. The strong
background noise, which occurs always on free chan-
nels, can be suppressed by the squelch function, which
has an automatic and a manual mode.
By turning the squelch control [SQ/ASQ] slowly clock-
wise you will find a position where the noise disappe-
ars. The squelch control should only be turned up far
enough to mute background noise on a signal-free
channel. Turning the control further clockwise will in-
creasingly suppress stronger interfering signals as well
as weak stations.
The automatic squelch [ASQ] uses a preset average
value. It can be activated by turning the squelch control
counterclockwise all the way to the end. The automatic
squelch mode is indicated by the ASQ symbol (ASQ)
in the LCD.
8
■ Keylock [LOCK]
Pressing the LOCK key for approximately 1 second will
activate/deactivate the key lock. The symbol LC will be
shown shortly. Except for the PTT key and the combi-
ned volume and on/off control, all elements are
blocked.
■ LCD color [COL]
Press the COL key shortly to switch between seven
LCD background colors. The background color can be
deactivated.
■ LCD Brightness [DIM]
Press the DIM key long to switch between the two avai-
lable brightness levels.
■ Priority Channels [9/19]
Press the 9/19 key shortly to switch to priority channel
9. Press the key again to advance to priority channel
19 and a third time to return to the channel in regular
mode.
The active priority channel mode is indicated by the
symbol P Y in the display. Channel switch by use of
the channel selector keys is deactivated in priority
mode.
■ Scan [SCAN]
Press the SCA key long to activate/deactivate the
channel scan function. The current frequency band will
be scanned until a signal is detected. The symbol SC
appears in the the display.
■ Modulation selection [MODE]
For the Maas KCB-300 the modulation modes AM and
FM are available. The selected modulation type is indi-
cated by an AM/FM symbol. To toggle between the
modes press the mode key [MODE]. Please note that
the frequency norm EC operates on FM only.
With the frequency norm UK, a triple switch is used.
You toggle between the CEPT band (AM/FM )and the
UK band (FM). The display will shortly show the symbol
UK or EU when switching the band.
OPERATION
9
■ Using the handheld microphone VOX function
The supplied handheld microphone can be used as a
VOX microphone, so that the switch to transmit is
voice-activated and the PTT button does not need to
be pressed to transmit. To activate the VOX function
you have to press and hold the [M] key on the micro-
phone, the green LED on the microphone will light up.
To deactivate the VOX, press and hold the [M] button
on the microphone again.
ote: The unit only switches to transmit when the
channel is not in use or only at very low volume level
(when using the original VOX microphone) to avoid
feedback during VOX operation. For a trouble-free
VOX operation it is recommended to connect only
one microphone
■ Adjusting VOX Sensivity
With activated VOX function push and hold micro-
phone UP key. Then push UP key repeatedly until the
desired sensitivity levels is reached.
The four different levels are distinguished by the num-
ber of tones that are emitted. For the greatest sensiti-
vity select the level 1 (one tone is emitted). The se-
lected level is stored automatically.
■ Selecting VOX delay period for handheld
microphone
With activated VOX function push and hold micro-
phone DOW key. Then push DOW key repeatedly
until the desired VOX deley period is reached. For the
shortest period select the level 1 (one tone is emitted),
level 4 is the longest. The selected period is stored au-
tomatically.
■ Hands-free transmission with earphone
microphone [VOX]
The KCB-3000 has a built-in VOX that can be used
with an earphone microphone with a Kenwood plug.
To connect the earphone microphone, first remove
the protective foil that prevents dirt from entering the
two jack sockets.
When the VOX function is activated by briefly pres-
sing the [VOX/LOCK] button, the VOX icon flashes on
the display. Then the radio can be operated in accor-
10
OPERATION
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