Cobra Electronics MR F75-D owner manual Maintenance Troubleshooting, Specifications

Page 33

Maintenance And

Troubleshooting

Operating Your Radio

Maintenance

•

 

Very little maintenance is required to keep your CobraMarine VHF radio in good operating condition.

■Keep the radio clean by wiping with a soft cloth and mild detergent. Rinse with fresh water. Do not use solvents or harsh or abrasive cleaners, which could damage the case or scratch the LCD screen.

■If the radio is exposed to salt water, rinse it in fresh water at least once a day to prevent build-up of salt deposits, which could interfere with button operation.

Troubleshooting

 

•

 

 

 

 

 

Problem

Possible Cause(s)

Solution(s)

No display on LCD when

Improper power

Insure power connections

radio is turned On

connection

are proper and secure

 

 

 

Will transmit at

Selected channel is

Switch to

one (1) watt, but not

limited to one (1) watt

another channel

at 25 watts

 

 

 

 

 

Will not transmit

Selected channel is

Switch to

 

limited to receive only

another channel

 

 

 

No sound from speaker

Volume level is too low or

Readjust volume

 

squelch level is too deep

and squelch

 

 

 

No answer to calls

Out of range of

Switch to high power

 

other station

(25 watts) or move closer

 

Signal is blocked

Move until you have

 

by terrain

a “line-of-sight” to

 

 

the other station

 

 

 

DSC distress

MMSI

Enter your MMSI number

cannot be sent

(DSC self-identification)

 

 

number is not entered

 

 

 

 

 

 

Specifications

 

Operating Your Radio

 

 

 

 

Specifications

•

 

 

 

 

 

 

 

 

 

 

 

General

 

 

 

Number of Channels

All U.S.A., Canadian, and International

 

 

 

10 NOAA Weather Channels

 

Channel Spacing

25 kHz

 

Modulation

5 kHz Max.

 

Input Voltage

13.8 VDC

 

Current Drain:

 

 

 

Stand-by

20 mA

 

Receive

200 mA

 

Transmit

5A @ High power 1A @ Low

 

Temperature Range

-20° C to 60° C

 

Unit Dimensions

6.25" x 2.25" x 7.125"

 

 

 

(15.9 cm x 5.7 cm x 18 cm)

 

Unit Weight

2 lbs., 6.8 oz. (1100 g)

 

 

 

 

 

 

Receiver

 

 

 

Frequency Range

156.050 to 163.275 MHz

 

Receiver Type

Double Conversion Super-Heterodyne

 

Sensitivity:

 

 

 

20 dB Quieting

0.35 uV

 

12 dB Sinad

0.30 uV

 

AF Output

4 Watts @ 8 Ohms

 

 

 

 

 

 

Transmitter

 

 

 

Frequency Range: TX

156.025 to 157.425 MHz

 

RF Output Power

1 and 25 Watts

 

Spurious Emissions

-60 dB High -55 dB Low

 

Microphone Type

Electret

 

Frequency Stability

+/-10 ppm

 

FM Hum and Noise

40 dB

 

 

 

 

 

 

 

 

 

60 English

Nothing Comes Close to a Cobra® 61

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Contents Class-D Fixed Mount VHF Radio Our Thanks To You Customer AssistanceCustomer Assistance For Assistance In The U.S.A For Assistance Outside The U.S.AMicrophone/Speaker Product Features Transceiver Controls Indicators And ConnectionsProduct Features Microphone/Speaker With Auxiliary ControlsTable Of Contents Important Safety Information Important Safety InformationSafety Training Information Always use only Cobra authorized accessoriesFCC Information Recommendations For Marine CommunicationVoice Calling VHF Marine Radio ProceduresMaritime Mobile Service Identity Mmsi Maritime Mobile Service Identity MmsiDigital Selective Calling DSC Digital Selective Calling DSCEmergency Messages Distress Procedure Radiotelephone CallsRadiotelephone Calls Marine Distress Procedure DSC Marine Distress ProcedureTell where you are SayIncluded In This Package Accessories Order InfoFor Credit Card Orders To Order OnlineMounting Powering The Radio Mounting And Powering The RadioMounting Electrical Power Connection To Connect To a Power SourceLength Wire Gauge Antenna Requirements Attachment Installation RequirementsAntenna Requirements And Attachment Safe Maximum Permissible Exposure MPE RadiusExternal Devices And Connections External Devices ConnectionsPower On-Off Tones And AlarmsVolume Getting StartedTo Receive Weaker Signals To Decrease The Volume You Can Choose One Of The FollowingStandby And Receive SquelchSet-Up Routines Set-Up Routines Settings MenuLCD Backlight LCD ContrastConfirmation Tone Confirmation tone setting on or OFFA./International/Canada Channel Maps Time OffsetVoice 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 Digital Select Calling DSC SetupUser 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 DirectoryDigital Select Calling DSC 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 Position Request Sending a Group CallIf The Station You Called Chose Not To Reply To Exit The Position Request ModeIf You Receive a Position If The Station You Called Cannot Send Its PositionReceiving a Position Request Sending a Position SendReceiving a Position Send To Clear Messages From The Call Log Memory Call Log and Distress LogSpecifications Maintenance TroubleshootingMaintenance TroubleshootingEnglish Nothing Comes Close to a Cobra VHF Marine Channel Assignments 03A 01A04A 05A19A 18A20A 21A28B 25B61A 62A79A 78A80A 81AVHF Marine Channel Assignments English Weather Channel AssignmentsWorld City Time Zones WarrantyWorld City Time Zones For Products Purchased In the U.S.AFlush Mount Template / Plantilla para montaje empotrado Product Service

MR F75-D specifications

Cobra Electronics has long been a name associated with reliable communication solutions, and the MR F75-D is no exception. This high-performance marine VHF radio is designed specifically for boaters, offering a blend of essential features, advanced technologies, and user-friendly characteristics that make it an excellent choice for both recreational and commercial marine applications.

One of the standout features of the MR F75-D is its Class D DSC (Digital Selective Calling) capability, which allows users to send distress calls and communicate with other vessels or coast guard stations at the push of a button. This increases safety on the water, as it provides an automated means to alert others in case of emergencies.

The radio operates seamlessly on the vital marine channels, ensuring that users have access to all the necessary frequencies for navigation and communication. With an impressive 25 watts of transmitting power, the MR F75-D provides extended range, ensuring that calls can be made even in challenging conditions.

The Cobra MR F75-D boasts an ergonomic design featuring a solid weather-resistant construction to withstand the harsh marine environment. Its large, easy-to-read backlit LCD display enhances readability in bright sunlight or low-light conditions, making it accessible under various circumstances.

Moreover, the radio includes a built-in NOAA weather radio with alerts. This feature keeps users informed about local weather conditions and forecasts, enabling them to make better decisions while out at sea. The option to scan channels and save favorites makes it easy to navigate through crowded frequencies to find the right communication line.

The MR F75-D is equipped with Dual Watch and Tri-Watch functions, allowing users to monitor two or three channels simultaneously. This increases the chances of receiving essential messages while on the water, providing greater peace of mind.

With a compact design, the MR F75-D can fit easily on most boats, while the intuitive controls enhance usability. The radio also supports external GPS connection, offering even better situational awareness.

In conclusion, the Cobra Electronics MR F75-D is a versatile, durable, and feature-rich marine VHF radio. With its DSC capabilities, NOAA weather notifications, and robust build, it proves to be an invaluable tool for safe and efficient marine communication, making it a top choice for any boating enthusiast.
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