Uniden GMR2838-2CK Portable Radio User Manual

*Range may vary depending on environmental and/or topographical conditions.
• 15 GMRS / 7 FRS Channels
• 121 Sub Codes
(CTCSS Tone and DCS Code)
• Up to 28 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 Channel Up/Down key
5 Call Key
6 Headset Jack
7 DC IN 9V
8 Menu/Power key
9 Volume Up/Down key
10 Microphone
11 Speaker
12 Battery Level Meter
13 Receive Indicator
14 Call Indicator
15 Scan Indicator
16 Hi Power Indicator
17 Low Power Indicator
18 Transmit Indicator
19 Volume Setting Indicator
20 Keypad Lock Indicator
21 VOX Indicator
22 Channel Indicator
23 Sub Code Indicator
24 Charging Contacts
Congratulations on your purchase of the Uniden
GMR2838-2CK (General Mobile Radio Service)
waterproof 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 - even outside by the pool!
Your radio complies with JIS4 water-proof
standards, which means the radio is resistant
to damage from light rain or water spray from
all sides.
The radio will only meet this rating if fully
assembled and all rubber seals and the jack
cover is well maintained and correctly fitted. This
means that the Headset plug is not inserted, and
the Headset jack cover and the battery pack are
attached and securely fastened.
Note: If your radio is exposed to salt water, clean
your radio thoroughly with a small amount of fresh
water (do not submerse it) , and dry it before
turning it on.
Your package contains two radios, two rechargeable
NiMH battery packs (#BP40), one AC adapter (#AD-
0001), one charging cradle (#RC1284), two belt clips
and this reference guide. A NiMH battery pack powers
your unit. 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 - #RC1284
• Headset - #ZA-133
• AC Adapter - #AD-0001
• DC Adapter - #DC-1002
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.
Your radio uses a supplied NiMH battery pack.
To install the NiMH battery pack:
1) Make sure your radio is OFF.
2) Release the battery latch at the bottom of the
radio, 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
prevent the unit from operating.
4) Before placing the battery cover back on the
radio, check the rubber seal around the battery
compartment and the ribbon of the battery pack:
make sure that the seal is in good condition and
that there is no foreign matter under the seal.
5) Replace the battery compartment door.
Note: If the rubber seal appears worn, nicked, or
dried out, replacement seals are available from
www.uniden.com or call 1-800-554-3988 during
business hours.
• Roger Beep
• Battery Charger
• Battery Level Meter
• Channel Monitor
• Channel Scan
• Keypad Lock
• DC IN 9V Jack
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.
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.
2) Charge the battery pack for 16 hours until the
battery indicator stops flashing.
Using the Charging Cradle
1) Connect the AC adapter (#AD-0001) 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.
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.
For fastest charging, turn off the radio before
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.
The charging cradle is not waterproof. If the
charging cradle falls into water, unplug it before
attempting to remove it from the water. Allow the
cradle to dry completely before reconnecting the
Wipe off dirt or shake water from your radio
before placing in the charging cradle if your radio
is soiled or wet.
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
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 121 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:
1) Press CH
or key to enter the channel
select mode. The channel indicator flashes.
2) Then press CH or key to increase or
decrease the channel number displayed.
To change the channel continuously, press and
hold CH or key for more than 1 second in
channel select mode.
3) To set a desired channel, press MENU/ key.
Note: Channels 1-7 have an typical range of up to
28 miles. Channels 8-14 have an typical range of
up to 5 miles. Channels 15-22 have an typical
range of up to 28 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 1-121 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 MENU/
2) Press the CH
or key to increase or
decrease the code number displayed. You can
also select oF (OFF) at this stage.
3) Press MENU/ key.
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 MENU/ key twice. The scan... icon and
oF(OFF) blink. Press CH key to select on, and then
press MENU/ key. The channel number changes as
the radio rapidly cycles through the channels.
To turn OFF channel scan:
Press the CALL, PTT, MENU/
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.
Note: If PTT or VOX is continuously used, 1 minute
after you start using the feature the transmission
stops and you hear a timeout error tone.
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 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 key to access your radio's
advanced functions.
1) To enter the Menu, press the MENU/
2) Additional presses of the MENU/ key
advance you through the Menu until exiting to
"Normal" operating mode.
3) Other methods of exiting the Menu function are:
a. Press and hold the MENU/ key again.
b. Press the PTT, MON, or CALL 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.
OFF, 1-5
Key Lock
Sub Code
Sub Code
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 CH 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 appears on the display. The current
call tone number (1-5) is indicated.
2) Press the CH 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 CH 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 MENU/
key to turn the
radio OFF.
2) Press and hold the MENU/ key again to turn
the radio ON. The keypad is unlocked.
Note: While in keylock on mode, you can still use
the radio to receive, transmissions, use call, VO
or , PTT, MON and MENU/ to turn on or off
the radio.
Automatic Power Save Feature
Your radio has a unique circuit designed to
dramatically extend the life of the batteries. If there
no transmission nor an incoming call within 3
your radio switches to the Power Save
mode. The radio is still able to receive
transmissions in this mode.
You can use a headset (#ZA-133) for more private
communications. To use a headset, lift the rubber
cover from over the headset jack, then plug in the
Important: Your radio is not waterproof when
using a headset jack. When you remove the headset,
be sure to fully press the jack cover into place to
restore its waterproof capability.
Your radio can be charged directly or by using the
supplied charging cradle.
Make sure to turn the radio OFF before placing
the radio in the 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.
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 MENU/
key to turn the
radio ON, and increase the speaker volume by
pressing the VO key. To decrease the volume,
press the VO key.
2) Press and hold the MENU/ key again to turn
the radio OFF.