Cobra Electronics LI 3900DX Channels To select a channel, Selectable HighLow Power Output

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Using Your Radio

Operation

Introduction

 

 

 

Operation

Customer Assistance

Warranty

Channel Buttons

Channel Number

Channels

•

To select a channel:

–With the radio on, select any of the

22 channels by pressing the Channel Up or Channel Down button.

Both radios must be tuned to the same channel to communicate.

Channels 1 through 7 are shared by FRS and GMRS. Channels 8 through 14 are FRS only. Channels 15 through 22 are GMRS only.

See page 25 for FRS/GMRS frequency allocations and compatibility charts.

Hi•Low Button

Hi Power Icon

Low Power Icon

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 applies to GMRS Channels 1 through 7 and 15 through 22 only. Channels 8 through 14 operate exclusively on low power.

To toggle between high and low power:

–Press and release the Hi•Low button.

When using Channels 1 through 7 and

15 through 22 on high power, the Hi icon will be visible on the display.

Listening

Call Button

4 English

Listening for a Response

When you are finished talking:

–Release the Talk button to receive incoming transmissions. Your microTALK® radio is always in Standby mode while the Talk or Call buttons are not pressed.

Call Button

To alert another person that you are calling:

–Press and release the Call button.

The other person 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.

•

•

Light/Max Range

When using those channels on low power and on Channels 8 through 14, the Low icon will be visible on the display.

Display Illumination

•

To illuminate your display:

–Press and release the Light/Max Range button to illuminate the display for

10 seconds.

Nothing Comes Close to a Cobra® 5

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Contents LI 3900DX Making Life Easier and Safer Product Features FeaturesCaring for Your microTALK Radio Avoid exposure to extreme temperaturesReplace battery compartment cover and belt clip Estimated operation time on full charge 10 hoursUsing Your Radio Listening for a Response When you are finished talking Selectable HighLow Power OutputTo toggle between high and low power Channels To select a channelTo turn the lock feature on or off Signal Strength Signal Strength MeterLock Feature Auto Squelch/Maximum RangePrivacy Codes Mode FunctionsScrolling through Mode Functions Set Ctcss Privacy CodesSet DCS Privacy Codes To turn VOX mode on or offStandby mode To select a DCS privacy codeMemory Locations To program a memory locationTo de-program a memory location To recall a stored memory channel locationWhile recalling a stored memory location While de-programming a memory locationChannel Scan To scan channelsFlash on the display Privacy Code Scan To scan privacy codesTo scan memory locations Press the Mode button to proceed to other functionsMemory Location Scan Number flash on the displayTo change a call tone setting Call Tone SettingsTo change call settings Press the Mode button untilGeneral Specifications Mode Functions General SpecificationsMode Button To change keystroke tones Keystroke TonesFCC License Product Service Product Service QuestionsWarranty and Trademark Acknowledgement Trademark AcknowledgementCobra line of quality products includes
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