Cobra Electronics MR F75 owner manual Standby And Receive, Squelch

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Operating Your Radio

On-Off Power/

Volume Knob or Volume Up/Down Buttons

Getting Started

To Increase The Volume You Can Choose One Of The Following:

Getting Started

Operating Your Radio

Standby And Receive

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

Squelch

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

b. Press and release the Volume Up button on the microphone/speaker.

To Decrease The Volume You Can

Choose One Of The Following:

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

b. Press and release the Volume Down button on the microphone/speaker.

When adjusting the volume while using the microphone/ speaker, press and hold the Volume Up or Volume Down buttons for rapid advance.

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 Of The Following:

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.

a. 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.

Squelch Knob

Turn Till Hissing Sound Starts

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.

NOTE

The Volume Up/Down buttons on the microphone/ speaker cannot be used in the squelch process. You must use the On-Off Power/Volume knob.

Channel 16/9 Button

b. 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.

c. 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.

Turn Till Hissing Sound Stops

Lower Bearier

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:

1.Turn the Squelch knob counterclockwise (lower bearier).

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

Weather/UIC Button

36 English

Nothing comes close to a Cobra® 37

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Contents MR F75 For Assistance Outside The U.S.A Customer Assistance For Assistance In The U.S.ATransceiver Controls Indicators And Connections Microphone/Speaker Product FeaturesTable Of Contents Important Safety Information Important Safety InformationSafety Training Information Always use only Cobra authorized accessoriesFCC Information Voice Calling VHF Marine Radio ProceduresMaritime Mobile Service Identity Mmsi Maritime Mobile Service Identity MmsiDigital Selective Calling DSC Digital Selective Calling DSCRadiotelephone Calls Emergency Messages Distress ProcedureMarine Distress Procedure DSC Marine Distress ProcedureTell where you are SayVHF Marine Channel Assignments 03A Government Only International Distress, Safety and Calling23A Government Only 21A U.S. Government Only Canada Coast Guard OnlyDigital Selective Calling Voice communications not allowed 64A U.S. Government Only Canada Commercial Fishing79A 78A80A 81ANoaa Weather Channels Alert World City Time ZonesIncluded In This Package Mounting Powering The RadioElectrical Power Connection Microphone/Speaker BracketFlush Mount Antenna Requirements And Attachment Installation RequirementsRadio Operator Requirements Safe Maximum Permissible Exposure MPE RadiusExternal Devices Connections Power On-Off Tones And AlarmsVolume Getting StartedSquelch Standby And ReceiveSet-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 ChannelsPublic Address Weather Radio And AlertNoaa All Hazards/Weather Radio And Alert Weather Alert Set-UpAdvanced Operation Weather Alert SignalAdvanced Operation Tri-WatchMemory Scan Memory ChannelsDSC Set-Up DSC Set-UpUser Mmsi Number If You Incorrectly Enter Your Mmsi NumberIf You Transfer Your Radio To a Different Vessel 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 ReplySending a Position Send Receiving a Position RequestStandby Mode Signal Receiving a Position SendCall Waiting Specifications Maintenance TroubleshootingMaintenance TroubleshootingProduct Service WarrantyExclusions This limited warranty does not apply For Products Purchased In the U.S.AOrder Form Optional Accessories Ordering From U.S.AMake check or money order payable to
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