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GMR2238-2CK
CHARGE
MIC
*Range may vary depending on environmental and/or topographical conditions.
• 15 GMRS / 7 FRS Channels
• 99 Sub Codes
(CTCSS Tone and DCS Code)
• Up to 22 Mile Range*
• Internal VOX Circuitry
• 5 Selectable Call Tone Alerts
• Backlit LCD Display
• Optional Headset Accessories
• Headset Jack
1 Antenna
2 PTT (Push-To-Talk) Button
3 Monitor Button
4 Scan Key
5 Menu Key
6 Channel Tone Key
7 Speaker
8 Up/Down Button
9 Headset Jack
10 On/Off Key
11 Call Key
12 Microphone
13 DC IN 9V
14 Battery Level Meter
15 Receive Indicator
16 Call Indicator
17 Scan Indicator
18 Channel Indicator
19 Hi Power Indicator
20 Low Power Indicator
21 Transmit Indicator
22 Volume Setting Indicator
23 Keypad Lock Indicator
24 VOX Indicator
25 Sub Code Indicator
26 Charging Contacts
Congratulations on your purchase of the Uniden
GMR2238-2CK (General Mobile Radio Service)
radio. This lightweight, palm-sized, radio is a state-
of-the-art device, equipped with many valuable
features. Use it at sporting events, to stay in
contact with family and friends, hiking, skiing,
outdoors, or in a neighborhood watch for vital
communication.
PACKAGE CONTENTS
Your package contains two radios, two rechargeable
NiMH battery packs (#BP40), one AC adapter (#PS-
0007), one charging cradle (#RC1285), two belt clips
and this reference guide. You can operate the unit
using the rechargeable NiMH battery pack or 4 AAA
alkaline batteries (not included). To order the following
optional accessories, visit our web site at www.
uniden.com or call 1-800-554-3988 during regular
business hours. Use only Uniden accessories.
• NiMH Battery Pack - #BP40
• Charging Cradle - #RC1285
• Headset - #HS910/HS915/ZA-133
• AC Adapter - #PS-0007
• DC Adapter - #DC-1002
GMRS LICENSE
The radio operates on the General Mobile Radio
Service (GMRS) frequencies when using
Channels 1-7 and channels 15-22. You must
have a GMRS license issued by the Federal
Communications Commission to legally use
these channels. For licensing information and
application forms, visit the FCC online at: www.
fcc.gov/wtb/uls or call the FCC hotline at
1-800-418-3676. If you have any questions, you
can contact the FCC direct at 1-888-225-5322.
No license is required for operation on channels
8-14 or operation on any channel in Canada.
INSTALL THE BATTERY
Your radio uses a supplied NiMH battery pack or
4 AAA alkaline batteries (not included).
To install the NiMH battery pack:
1) Make sure your radio is OFF.
2) Remove the battery compartment door by
pressing the tab at the bottom of the
compartment door, and remove the cover.
3) Install the NiMH battery pack into the battery
compartment. Be certain to follow the
instructions written on the label on the battery
pack. Installing the battery pack incorrectly will
USING THE RADIO
• Roger Beep
• Battery Charger
• Battery Level Meter
• Channel Monitor
• Channel Scan
• Keypad Lock
• DC IN 9V Jack
BATTERY LEVEL AND LOW
BATTERY ALERT
This unit has a battery level meter on the display to
indicate the status of the batteries. When the
battery in the unit is low, the battery level meter
icon
flashes. Recharge the NiMH battery
pack immediately or if you are using the alkaline
batteries, you must replace the alkaline batteries in
order to continue using the radio.
Warning! To avoid the risk of personal injury or
property damage from fire or electrical shock, only
use the Uniden accessories specifically designated
for this product.
GMR2238-2CK RADIO
CHARGING THE RADIO
If you use the rechargeable NiMH battery pack, two
radios can be charged directly or by using the
supplied charging cradle.
Charge by Using the Radio
1) Connect the optional DC adapter (#DC-1002) to
DC IN 9V jack of the radio and to a cigarette
lighter port.
2) Charge the battery pack for 16 hours until the
battery indicator stops flashing.
Using the Charging Cradle
1) Connect the AC adapter (#PS-0007) to DC IN 9V
jack and to a standard 120V AC wall outlet.
2) Set the charging cradle on the desk or tabletop,
and place the radio in the charging cradle with
the keypad facing forward.
3) Make sure that the LED illuminates. Charge the
battery pack for 16 hours and remove the radio
from the charging cradle after charging.
Note:
• For charging batteries directly without the cradle,
use only the #DC-1002 Cigarette Lighter Adapter
cord, available from www.Uniden.com.
Other power cords could damage your radio.
• DC IN 9V Jack of the radio is for charge only.
Be sure to install the battery before charge.
• Use only the supplied battery and AC adapter or
approved accessories from Uniden.
• Charge time may vary depending on the battery
life remaining.
• Do not recharge alkaline batteries. Doing so can
create a safety hazard or damage the radio.
• For fastest charging, turn off the radio before
charging.
prevent the unit from operating.
4) Replace the battery compartment door.
In order to get the most out of your new radio, read
this reference guide completely before attempting to
operate the unit.
Turning the Radio On and Adjusting the Volume
1) Press and hold the
key to turn the radio ON,
and increase the speaker volume by pressing the
▲ key. To decrease the volume, press the ▼
key.
2) Press and hold the key again to turn the radio
OFF.
Adjusting the Sound (Key Beeps)
Your radio emits a beep each time one of the keys
(except for the PTT button and CALL key) is
pressed.
To turn this sound OFF, press and hold the
CALL key while turning ON the radio. Repeat this
step to turn the sound ON.
Choosing a Channel
Your radio has 22 channels and 99 Sub codes you
can use to talk to others. In order to speak to
someone, each of you must be set to the same
channel and Sub code.
To choose a channel:
With the radio in "Normal" operating mode press the
CHAN TONE key and press the ▲ or ▼ key to
increase or decrease the channel number displayed.
Note: Channels 1-7 have an typical range of up to
22 miles. Channels 8-14 have an typical range of
up to 5 miles. Channels 15-22 have an typical
range of up to 22 miles. You can know which GMRS
or FRS channel is active by the icon. hi icon is
displayed while scanning GMRS channels, and the
lo icon is displayed while scanning FRS channels.
Choosing a Sub Code
Each of the channels 1-22 may have any one of
the codes, OFF or 1-99 selected. Code oF (OFF)
indicates no Sub code selected and your radio can
receive a signal regardless of the code settings of
the transmitting radio.
1) Press CHAN TONE in channel select mode.
The subcode indicator will flash.
2) Press the ▲ or ▼ key to increase or decrease
the code number displayed. You can also select
oF (OFF) at this stage.
3) Exit the Menu.
Channel Scan Feature
Your radio has a channel scan feature that allows
you to easily scan all 22 channels. When an active
channel is detected, the radio pauses on that
channel until the channel is clear. Then after a 2
second delay, the radio continues scanning.
Pressing the PTT button while the scan is paused
on a channel allows you to transmit on that
channel.
To turn ON channel scan:
Press the SCAN key until the scan... icon is
displayed. The channel number on the display
changes as the radio rapidly cycles through the
channels.
To turn OFF channel scan:
Press the CALL, PTT, MENU or SCAN key.
Talking on Your Radio
To talk to others using the radio:
1) Press and hold the PTT button and speak in a
clear, normal voice about 2-3 inches away from
the microphone. While you are transmitting, the
icon appears on the display. To avoid cutting
off the first part of your transmission, pause
slightly after pressing the PTT button before you
start talking.
2) When you have finished speaking, release the
PTT button. You can now receive incoming
calls. While receiving, the icon appears on
the display.
Monitor Mode Feature
Your radio allows you to listen for weak signals on
the current channel at the press of a key.
To turn ON the Monitor Mode:
• For brief listening, press MON button. The
icon blinks.
• Press and hold MON button for 2 seconds until
two beeps sound for continuous listening. The
receiver circuit stays open, letting both the noise
and weak signals to be heard.
To turn OFF Monitor Mode:
Press MON button to return to "Normal" mode,
and the
icon stops blinking and disappears.
Navigating through the Menu
Use the MENU button to access your radio's
advanced functions.
1) To enter the Menu, press the MENU key.
Normal NormalVOX Level Call Tone Key Lock
1-5
OFF, 1-5
ON-OFF
2) Additional presses of the MENU key advances
you through the Menu until exiting to "Normal"
operating mode.
3) Other methods of exiting the Menu function are:
a. Press and hold the key again.
b. Press the PTT, MON, CALL, SCAN or CHAN
TONE key
c. Wait 10 seconds until the unit automatically
returns to “Normal” mode.
Voice Operated Transmission
Your radio is equipped with a user selectable Voice
Operated Transmitter (VOX) that can be used for
automatic voice transmissions. The VOX feature is
designed to be used with a headset with a
microphone. Transmission is initiated by speaking
into the remote microphone instead of pushing the
PTT button.
To select the VOX level:
1) Enter the Menu. Advance through the Menu until
the vox icon appears on the display. The current
level (OFF, 1-5) will be indicated. Level oF (OFF)
disables VOX, while levels 1-5 set the sensitivity
of the VOX circuit.
2) Press either the ▲ or ▼ key to the desired VOX
sensitivity level. Use level 1 for increased
sensitivity to voice in normally quiet environments
,
and use a higher level to reduce undesired
activation in very noisy environments.
Transmitting a Call Tone
Your radio is equipped with 5 selectable call tones
that are transmitted when the CALL key is pressed.
To select a call tone:
1) Enter the Menu. Advance through the Menu until
the call icon is shown on the display. The
current call tone number (1-5) is indicated.
2) Press the ▲ or ▼ key to increase or decrease
the number to the desired call tone. Each tone
will be heard through the speaker.
To transmit the selected call tone, press the CALL
key. The selected tone will automatically be
transmitted for a fixed length of time. Call Tone will
be cancelled when the PTT button is pressed.
Key Lock
To lock the keypad:
1) Enter the Menu. Advance through the Menu until
the icon appears on the display. The current
Key Lock status oF (OFF) blinks on the display.
2) To switch the Key Lock mode from oF (OFF) to
on, press the ▲ key.
3) To confirm the setting, press the MENU key.
The radio returns to the "Normal" mode.
Note: If you exit the setting mode before confirming
your selection by pressing the MENU key, the Key
Lock setting will be set to oF (OFF).
To unlock the keypad:
1) Press and hold the
key to turn the radio OFF.
2) Press and hold the key again to turn the radio
ON. The keypad is unlocked.
Automatic Power Save Feature
Your radio has a unique circuit designed to
dramatically extend the life of the batteries. If there is
no transmission nor an incoming call within 3 seconds,
your radio switches to the Power Save mode. The
radio is still able to receive transmissions in this
mode.
LCD Backlight
The LCD Backlight automatically turns ON when any
key (except the PTT button) is pressed. The LCD
display illuminates for 10 seconds before turning
OFF.
Roger Beep
Roger Beep is a BEEP that is sent to notify the end of
transmission (both PTT and VOX transmission).
Roger Beep can be heard through the speaker when
both Roger beep and Key Beep are set to ON. When
Roger beep is set to ON and Key Beep OFF, Roger
Beep will not be heard from the speaker but it will be
transmitted to your party. When Roger Beep is set to
OFF, Roger Beep neither be herad nor transmitted.
To turn ON Roger Beep:
Press and hold the ▲ key while turning ON the radio.
To turn OFF Roger Beep:
Press and hold the ▲ key while turning ON the radio.
• Battery must be installed for operation, even from
external power.
• If battery Power is low, you cannot operate the
radio even using external power. Allow the
batteries to charge before using. If you try to
transmit while power is low, the radio will
automatically turn off.