Uniden gmr638-2 参照ガイド

Choosing a Channel
Your radio has 22 channels and 38 CTCSS codes
you can use to talk to others. In order to speak to
someone, each of you must set to the same 
channel and CTCSS code.

To choose a channel:
With the radio in "Normal" operating mode press the ch
key and press the 

▲ or ▼ key to increase or decrease

the channel number displayed.

Note: FRS channels 8-14 have an expectancy
range of up to 2 miles. GMRS channels 1-7, 15-22
have an expectancy range of up to 6 miles.
You can know which GMRS or FRS channel is
active by the icon. The 

• 15 GMRS / 7 FRS Channels
• 38 CTCSS Codes
• Up to 6 Mile Range*
• Internal VOX Circuitry
• 5 Selectable Call Tone Alerts
• Backlit LCD Display
• Optional Headset Accessories
• Headset Jack
• Roger Beep

1

Antenna

2

PTT (Push-To-Talk) Button

3

Monitor Key

4

Call Key

5

Scan Key

6

Channel Key

7

Speaker

8

Headset Jack

9

On/Off/Select Key

10 Volume Up (Default)/

Channel Up Key

11 Volume Down (Default)/

Channel Down Key

12 Microphone

13 Battery Level Meter
14 Receive Indicator
15 Call Indicator
16 Scan Indicator
17 Channel Indicator
18 Transmit Indicator
19 Volume Setting Indicator
20 VOX Indicator
21 GMRS/FRS Indicator
22 Keypad Lock Indicator
23 CTCSS Indicator
24 Charging LEDs
25 Charging Contacts

Congratulations on your purchase of the Uniden
GMR638 Series (General Mobile Radio Service)
radio. This product is a lightweight, palm-sized
radio. Use it at sporting events to stay in contact
with family and friends, hiking, skiing, outdoors, or
in a neighborhood watch for vital communication.
This compact, state-of-the-art device is equipped
with many features.

Depending on the model configuration, your 
package should include:

GMR638-2
Two GMR638 Radios with Belt Clips

GMR638-2CK
Two GMR638 Radios with Belt Clips
One Dual Charging Cradle (RC6338)
Two Rechargeable Batteries (BP38)
One AC Adapter (AD-0001)

GMR638-3CK
Three GMR638 Radios with Belt Clips
One Dual Charging Cradle (RC6338)
One Single Charging Cradle (RC6488)
Three Rechargeable Batteries (BP38)
Two AC Adapters (AD-0001)

The following optional accessories may be 
purchased by calling the Customer Hotline at 
1-800-297-1023 (Mon-Fri 7 am to 7 pm,
Sat/Sun/holidays--except Thanksgiving and
Christmas--9 am to 5 pm, CST).

•  NiMH Battery Pack - #BP38

•  Charging Cradle - #RC6338 or RC6488

•  Headset - #HS2467

•  AC Adapter (AD-0001)

Each GMR638 radio uses a NiMH battery pack (not
included with GMR638-2) or 4 AAA alkaline batter-
ies (not included). If you use alkaline batteries, we
recommend high quality alkaline batteries.

To install the NiMH battery pack:

1) Make sure your radio is OFF.
2) Release the battery cover clip, then remove the

battery cover.

3) Install the NiMH battery pack into the battery

compartment. Be certain to follow the instruction
written on the label on the battery pack.
Installing the battery pack incorrectly will prevent
the unit from operating.

4) Align the battery cover tabs with the GMR638

tab holes then replace the cover clip.

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 sel/

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 sel/

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.

Navigating through the Menu
To access the advanced features of the 
GMR638, your radio has a Menu function.

• Battery Charger
• Battery Level Meter
• Channel Monitor
• Channel Scan
• Keypad Lock
• Key Beep

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 

will flash.

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.

1) To enter the Menu, press the sel/

key.

2) Additional presses of the sel/

key will 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 sel/

key again.

b. Press the PTT button, mon, call, scn, or ch key.
c. Wait 10 seconds until the unit automatically returns to

“Normal” mode.

Choosing a CTCSS Code
Each of the channels 1-22 may have any one of
the codes, OFF or 1-38 selected. Code oF (OFF) 
indicates no CTCSS code selected and your radio
can receive a signal regardless of the code settings
of the transmitting radio.

1) Enter the Menu. The CTCSS code on the LCD

display will appear.

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.

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 will appear 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 will appear on the

display.

Voice Operated Transmission
Your GMR638 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, 1-3) will be indicated. Level oF (OFF)
disables VOX, while levels

-

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.

3) Exit the Menu.

Transmitting a Call Tone
Your GMR638 radio is equipped with 5 selectable
call tones that will be 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 (

-

) will be 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.

Normal

Normal

CTCSS

VOX Level

Call Tone

Key Lock

1-5

OFF, 1-38

OFF, 1-3

ON-OFF

You can use a charging cradle to recharge the BP38
batteries in your GMR638.
GMR638-2CK and GMR638-3CK includes charging
cradle(s). Follow these
instructions to recharge the radios in a charging 
cradle.
Make sure to turn the radio OFF before placing
the radio in the charging cradle. Otherwise the
battery level meter icon won’t indicate properly.

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 charge.

Note: Always make sure your battery pack is fully
discharged before recharging to prolong the life of
the battery pack. The LED will illuminate while the
radio is in the charging cradle.

3) Exit the Menu.

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.

Channel Scan Feature
Your GMR638 radio has a channel scan feature
that allows you to easily scan all 22 channels.
When an active channel is detected, the radio will
pause on that channel until the channel is clear.
Then after a 2 second delay, the radio will continue
scanning. Pressing the PTT button while the scan
is paused on a channel will allow you to transmit on
that channel.

To turn ON channel scan:
Press the scn key the scan... icon is displayed.
The channel number on the display will change as
the radio rapidly cycles through the channels.

To turn OFF channel Scan:
Press the sel/

, call key, and PTT button or press

the scn key.

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 sel/

key.

The radio returns to the "Normal" mode.

Note: If you exit the setting mode before confirming
your selection by pressing the sel/

Lock setting will be set to oF (OFF).

To unlock the keypad:
1) Press and hold the sel/

key to turn the radio

OFF.

2) Press and hold the sel/

key again to turn the

radio ON. The keypad is unlocked.

Automatic Power Save Feature
Your GMR638 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 transmis-
sions in this mode.

LCD Backlight
The LCD Backlight will automatically turn ON when
any key (except the PTT button is pressed. The
LCD display will illuminate for 10 seconds before
turning OFF.

Note: The charge indicator LEDs will remain on as
long as the radios are left in the charger.