Cobra Electronics MRF45 owner manual Volume, Standby And Receive, Squelch

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Getting Started

Operating Your Radio

Volume

The On-Off Power/Volume knob on the transceiver controls the speaker volume. The volume adjustment applies only to what you hear from the speaker and does

Getting Started

Operating Your Radio

Standby And Receive

Standby mode is the usual mode for the radio whenever it is turned On.

not affect the volume of your outgoing messages. That is controlled by the circuitry of your radio.

On-Off Power/

To Increase The Volume:

Volume Knob

Turn the On-Off Power/Volume knob clockwise.

 

To Decrease The Volume:

Turn the On-Off Power/Volume knob counter-clockwise.

Squelch

Squelch control filters weak signals and radio frequency noise so that you can more clearly hear the signals you want. You can think of it as a variable barrier that blocks what you don’t want to hear.

Standby Mode

Up/Down Buttons

From Standby Mode,You Can:

■Change your radio’s settings using set-up routines.

■Receive messages on the current channel as well as DSC messages.

■Receive NOAA alerts if Weather Alert mode is turned On.

■Switch to Transmit mode using the Talk button.

While the radio is in Standby mode, the Receive mode is entered whenever a strong enough signal to break squelch is sent to the radio. You will hear the message through whichever speakers are connected to the radio.

To Change The Channel You Are Listening To You Can Choose One (1) Of The Following:

Squelch Knob

Turn Until Hissing Sound Starts

Turn Until Hissing Sound Stops

To Squelch Your Radio:

1.With the Squelch knob turned fully counter-clockwise, turn the On-Off/Volumeknob clockwise until you hear a hissing (noise) sound.

2.Turn the Squelch knob clockwise until the hissing sound stops.

Turning the Squelch knob further clockwise (higher bearier) will filter weak and medium strength signals until only

the strongest signal can get through at the highest squelch setting.

To Receive Weaker Signals:

Turn the Squelch knob counterclockwise (lower bearier).

Channel 16/9 Button

■Press the Up/Down buttons. This will take you to the next higher or lower VHF channel. For rapid advance, press and hold the Up or Down button.

■Press the Channel 16/9 button. This will take

you to Channel 16 with one (1) press and to Channel 9 with a second press. Additional presses will toggle between Channels 16 and 9.

■Press the Weather/UIC button. This will toggle the

radio between Standby mode and Weather Radio mode. When in Weather Radio mode, the Up/Down buttons will change the weather channel.

Lower Bearier

If the squelch is set so that you can hear a continuous hissing sound, the scan and dual-watch functions will be blocked.

Weather/UIC Button

36 English

Nothing Comes Close to a Cobra® 37

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Contents Our Thanks ToYou Customer Assistance For Assistance In The U.S.AFor Assistance Outside The U.S.A Microphone Product Features Product FeaturesMicrophone With Auxiliary Controls Table Of Contents Important Safety Information Important Safety InformationSafety Training Information Always use only Cobra authorized accessoriesRecommendations For Marine Communication FCC Licensing InformationVHF Marine Radio Procedures Maintain Your Watch VHF Marine Radio ProceduresVoice Calling Voice CallingMaritime Mobile Service Identity Mmsi Maritime Mobile Service Identity MmsiDigital Selective Calling DSC Digital Selective Calling DSCEmergency Messages And Distress Procedure Emergency Messages Distress ProcedureRadiotelephone Calls Radiotelephone CallsMarine Distress Procedure DSC Marine Distress ProcedureTell where you are SayVHF Marine Channel Assignments VHF Marine Channel Assignments156.700 Rx Only 156.750 International Distress, Safety and Calling156.800 156.850 03A Government Only20A Port Operations Port Operations, Ship Movement 21A U.S. Government Only Canada Coast Guard Only23A Government Only Digital Selective Calling Voice communications not allowed 64A U.S. Government Only Canada Commercial Fishing81A U.S. Government Only Environmental Protection Operations Noaa Weather Channels Alert World City Time ZonesWorld City Time Zones Noaa Weather Channels And AlertMounting And Powering The Radio Mounting Powering The RadioIncluded In This Package Included In This PackageElectrical Power Connection Microphone BracketFlush Mount Kit Not Included Antenna Requirements And Attachment Installation RequirementsRadio Operator Requirements Safe Maximum Permissible Exposure MPE RadiusExternal Devices And Connections External Devices ConnectionsGlobal Positioning System GPS Device Not Included Microphone AttachmentPower On-Off Tones And AlarmsGetting Started Getting StartedVolume Standby And ReceiveSquelch Set-Up Routines Set-Up Routines Settings MenuLCD Backlight LCD ContrastA./International/Canada Channel Maps To Set Your Radio For The Area In Which You Will Be Using ItVoice Transmission Transmit Power OutputVoice Transmission ChannelsAdvanced Operation Weather Radio And AlertNoaa All Hazards/Weather Radio And Alert Advanced OperationScan Dual-WatchDSC Set-Up DSC Set-UpUser Mmsi Number If You Incorrectly Enter Your Mmsi NumberIfYou TransferYourRadioTo a DifferentVessel Group Mmsi NumberDSC Scanning Individual Directory Position Request Reply TypeTo Set The Position Request Reply Type To Enter Or Edit Names And Mmsi Numbers In The DirectoryDSC Operation DSC OperationSending Distress Calls Sending An All Ships Calls Receiving Distress CallsRegarding Distress Relay Calls Receiving Distress Relay CallsSending An Individual Call Receiving An All Ships CallSending a Geographical Call Receiving a Geographical CallReceiving a Group Call Receiving An Individual CallSending a Group Call Sending a Position RequestIf You Receive a Position To Exit The Position Request ModeIf The Station You Called Cannot Send Its Position If The Station You Called Chose Not To ReplyReceiving a Position Request Sending a Position SendReceiving a Position Send Specifications Maintenance TroubleshootingMaintenance TroubleshootingProduct Service Optional Accessories Accessories Order Info
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