background image

3

Nothing 

Comes Close to a Cobra

®

2

English

For charging microTALK

®

radio(s) in desktop

charger:

1. 

Insert radio(s) into desktop charger as shown. 

2.

Insert round connector of 120 volt adapter
into jack on back of charger.

3.

Plug 120 volt adapter into electrical outlet.

If charging light is not 

on

, check position of radio. Radio should be

upright. The charge indicator light will stay 

on

as long as the radio

is in the charging well and the battery pack is charging. After the
battery pack is fully charged, the charge indicator light will turn 

off.

It normally takes about 15 hours to fully recharge battery pack. 
Battery pack will not be damaged if they stay in the charging well
longer than that. 

Each port can charge one radio. Uses 120 Volt adapter. 

Cobra recommends your radio is turned 

off

while being charged.

Turning on Your microTALK

®

Radio

To turn on your radio:

Press and hold the 

Power

button until you 

hear a series of audible tones indicating the
radio is 

on

.

Your microTALK

®

radio is now in 

Standby 

mode, ready to receive transmissions. The radio
is always in 

Standby 

mode, except when the

Talk

Call

or 

Power

buttons are pressed.

Battery Low

When battery power is low, the 

Battery Low

icon

will blink. Your batteries should be recharged.

Auto Battery Save

Your microTALK

®

radio has a unique circuit

designed to extend battery life. If there are 
no transmissions for 10 seconds, the radio will
automatically switch to 

Battery Save 

mode and

the 

Power Saver

icon will flash in the display.

This will not affect the radio’s ability to receive
incoming transmissions.

Communicating with Another Person

To talk to another person:

1.

Press and hold the 

Talk

button.

2.

With the microphone about two inches 
(five cm) from your mouth, speak in a 
normal voice.

3.

Release the 

Talk

button when you are 

finished talking and listen for a response.

You cannot receive incoming calls while 
pressing the 

Talk

button.

Both radios must be tuned to 
the same channel/privacy code 
to communicate.

Battery Low

Battery Save Mode

Talk Button

Two Inches  (five
cm) from Mouth

The Basics to Get You Started

Your microTALK

®

radio is easy to use. 

To get started, simply:

1.

Press and hold the 

Power 

button to turn 

on

your radio.

2.

Press the 

Channel Up

or 

Channel Down

button to select a channel.

Both radios must be tuned to 
the same channel/privacy code 
to communicate.

3.

Press and hold the 

Talk

button while 

speaking into the microphone.

4.

When finished talking, release the 

Talk

button and listen for a response.

Introduction

Using Your  Radio

Customer Assistance

Warranty

Introduction

Operation

Insert Radio(s)

On/Off Power

Summary of Contents for LI 3900DX

Page 1: ...Owner s Manual Nothing Comes Close to a Cobra English TWO WAY RADIO MODEL LI 3900DX Printed in China Part No 480 249 P Version B ...

Page 2: ... prefer For Assistance in the U S A In this user s manual you should find all the information you need to operate your microTALK radio If you require further assistance after reading this manual Cobra Electronics offers the following customer assistance services Automated Help Desk English only 24 hours a day 7 days a week 773 889 3087 phone Customer Assistance Operators English and Spanish 8 00 a...

Page 3: ...munication under ideal conditions Features 22 Channels Seven shared with FRS GMRS seven FRS only eight GMRS only 121 Privacy Codes 38 CTCSS codes 83 DCS codes Hands Free Operation VOX VibrAlert Silent Paging 10 Channel Memory Signal Strength Meter Scan Channel privacy codes memory Selectable Hi Low Power In GMRS Backlit LCD Display Button Lock Call Alert 10 selectable tones Speaker Microphone Char...

Page 4: ... ion battery pack Position battery pack according to polarity markings 4 Replace battery compartment cover and belt clip Estimated operation time on full charge 10 hours Rechargeable battery packs must be recycled or disposed of properly in compliance with all applicable laws They may not be thrown in the trash Certain states or municipalities require recycling and have established collection prog...

Page 5: ...on will blink Your batteries should be recharged Auto Battery Save Your microTALK radio has a unique circuit designed to extend battery life If there are no transmissions for 10 seconds the radio will automatically switch to Battery Save mode and the Power Saver icon will flash in the display This will not affect the radio s ability to receive incoming transmissions Communicating with Another Pers...

Page 6: ...erson will hear a two second call tone This tone is used only to establish voice communications See page 23 on how to select from 10 available call tone settings Low Power Icon Hi Power Icon Operation Hi Low Button Selectable High Low Power Output When in close proximity to another party or during favorable conditions you can switch from High to Low Power to extend battery life This feature applie...

Page 7: ...annels 8 through 14 your radio automatically switches to low power which will limit the range the radio can communicate Remember you can achieve maximum range by using maximum range extender See page 6 for details 6 English Using Your Radio Auto Squelch Maximum Range Your microTALK radio is equipped with Auto Squelch which automatically shuts off weak transmissions and unwanted noise due to terrai...

Page 8: ... used on the same channel at the same time To successfully communicate using a privacy code both the sending and receiving radios must be tuned to the same channel and to the same privacy code system CTCSS or DCS and privacy code number Each channel will remember the last privacy code system and number you select The privacy code 00 is not a privacy code but allows all signals to be heard on a cha...

Page 9: ...annel Down button to change the setting 3 Choose one of the following a Press the Mode button to enter the selected setting and proceed to other functions b Press the Lock Enter button to enter the selected setting and return to Standby mode VOX Sensitivity Level Mode Button Channel Buttons VOX Icon Mode Button Channel Buttons Set DCS Privacy Codes To select a DCS privacy code 1 After selecting a ...

Page 10: ...se one of the following a Press the Channel Up or Channel Down button to select a CTCSS privacy code 01 through 38 for the channel b Press the Lock Enter button to switch from CTCSS to DCS The DCS icon and privacy code numbers will flash on the display The Channel Up or Channel Down button can then be used to select a DCS privacy code 01 through 83 for the channel If OFF flashes in place of the pr...

Page 11: ...vacy code displayed before you entered mode functions While de programming a memory location if you do not press any buttons for 15 seconds your radio will automatically return to Standby mode on the channel privacy code displayed before you entered mode functions Channel 0 To recall a stored memory channel location 1 Press the Mode button until the Memory icon and the memory location number flash...

Page 12: ...smission This will then return the radio to Standby mode b Press the Mode button to proceed to set privacy code scan on the channel that was either displayed before you entered mode functions or on which during channel scanning you last received a transmission see page 18 for further details c Press the Lock Enter button to return to Standby mode on the channel privacy code that was displayed befo...

Page 13: ...ation scan see page 20 for further details c Press the Lock Enter button to return to Standby mode on the channel privacy code that was displayed before you entered mode functions or the channel privacy code on which during scanning you last received a transmission Privacy Code Scan Your microTALK radio can automatically scan the Privacy Codes either CTCSS 01 through 38 or DCS 01 through 83 within...

Page 14: ...er button to return to Standby mode on the channel privacy code that was displayed before you entered mode functions or the memory location on which during scanning you last received a transmission To reduce the number of memory locations being scanned you may de program any unwanted locations See page 15 to de program a memory location Memory Location Scan Your microTALK radio can automatically s...

Page 15: ...or off setting is displayed 2 Press the Channel Up or Channel Down button to select roger beep on or off 3 Choose one of the following a Press the Mode button to enter the new setting and proceed to other functions b Press the Lock Enter button to enter the new setting and return to Standby mode Roger Beep On VibrAlert and Call Alert Your microTALK radio can alert you to incoming signals by soundi...

Page 16: ...annel numbers for the same frequency For example a Cobra 15 Channel GMRS model would need to be tuned to Channel 11 in order to communicate with a 22 Channel GMRS tuned to Channel 15 Please refer to the chart below for channel frequency number compatibility A Channel No for 22 Channel FRS GMRS Models B Channel No for 15 Channel GMRS Models C Type of Radio Service D Frequency in MHz E Power Output ...

Page 17: ...t for unlicensed use of GMRS channels in violation of FCC rules Operation of this radio is subject to additional rules specified in 47 C F R Part 95 Licensed users will be issued a call sign by the FCC which should be used for station identification when operating this radio GMRS users should also cooperate by engaging in permissible transmissions only avoiding channel interference with other GMRS...

Page 18: ...duct damaged by accident 2 In the event of misuse or abuse of the product or as a result of unauthorized alterations or repairs 3 If the serial number has been altered defaced or removed 4 If the owner of the product resides outside the U S A All implied warranties including warranties of merchantability and fitness for a particular purpose are limited in duration to the length of this warranty Co...

Page 19: ...dios Radar Laser Detectors Safety Alert Traffic Warning Systems Handheld GPS Receivers Mobile GPS Navigation Systems HighGear Accessories CobraMarine VHF Radios CobraMarine Chartplotters Power Inverters Accessories For more information or to order any of our products please visit our website www cobra com ...

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