Getting Started

Operating Your Radio

Getting Started

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Refer to the foldout on the front cover of this manual to identify the various controls and indicators on your radio.

Throughout this manual you will be instructed to press or to press and hold buttons on the radio. Press means a momentary press, then release; press and hold means to hold the button down.

Whenever you press any button except the Talk button on your radio, a brief tone (beep) will sound to confirm the button press. With all button presses, the appropriate icon will appear on the LCD and the backlight will turn On. The backlight will stay On for five (5) seconds after the button is released.

At times you will hear two (2) other sounds. Two (2) beeps will sound to confirm your setting changes and three (3) beeps will sound to notify you of an error.

Power On-Off

The On-Off Power/Volume knob on the top of the radio is held in the Off position by a click stop.

Operating Your Radio

On-Off Power/Volume Knob

Squelch Knob

Getting Started

Volume

The On-Off Power/Volume knob also controls the speaker Volume. The Volume adjustment applies only to what you hear from the speaker and does not affect the Volume of your outgoing messages, which is controlled by the circuitry of your radio.

To Increase The Volume:

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

To Decrease The Volume:

1.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.

Squelch Knob

On-Off Power/Volume Knob

On-Off Power/Volume Knob

To Turn Your Radio On:

1.Turn the Squelch knob half-way counter-clockwise (when viewed from above).

2.Turn the On-Off Power/Volume knob clockwise until you hear and feel a click.

When the radio is powered On, a brief tone will sound, the display backlight will turn On, and the display will show all icons for two (2) seconds. All buttons will be inoperative during these two (2) seconds.

After two (2) seconds, the radio will return to the settings in effect when it was last powered Off, the LCD will show the appropriate icons, and all controls will be operative.

The radio will then be in Standby mode.

To Turn Your Radio Off:

1.Turn the On-Off Power/Volume knob all the way counter-clockwise until you hear and feel a click.

To Squelch Your Radio:

1.With the Squelch knob turned fully counter-clockwise, turn the On-Off Power/Volume knob 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 will filter weak and medium strength signals until only the strongest signal can get through at its highest setting.

To receive weaker signals, turn the Squelch knob counter-clockwise.

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

30 English

Nothing comes close to a Cobra® 31

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Cobra Electronics MR HH400X VP warranty Getting Started, Power On-Off, Volume, Squelch
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MR HH400X VP specifications

The Cobra Electronics MR HH400X VP is a robust marine handheld VHF radio designed for boaters seeking reliable communication on the water. This compact device boasts a variety of features that enhance safety and convenience while navigating the seas.

One of the standout characteristics of the MR HH400X VP is its impressive 6 watts of power output, which allows for a longer communication range. Whether you're planning day trips near the shore or extended voyages further out, this radio ensures you can stay connected with fellow boaters or emergency services when needed.

The device is built with a waterproof rating of IPX7, which means it can withstand being submerged in water for up to 30 minutes. This durability makes it ideal for marine environments where exposure to the elements is a frequent concern. Additionally, the radio is equipped with a rugged construction that can resist drops and impacts, ensuring it can handle the rigors of any boating adventure.

In terms of technology, the MR HH400X VP features an integrated GPS. This capability is essential for boaters who want real-time positioning and navigation information. The built-in GPS not only provides accurate location data but also allows for quick access to distress channels and can transmit your position during emergencies, significantly enhancing safety on the water.

Another notable feature is the Cobra's Rewind-Say-Again function. This innovative technology allows users to replay the last 20 seconds of received transmissions, ensuring no important messages are missed. The bright backlit display and simple interface make it user-friendly, even in low-light conditions.

The radio also includes a dual and triple watch capability, which allows users to monitor two or three channels simultaneously. This functionality is particularly useful for boaters who want to stay informed about both routine communications and emergency channels.

The Cobra MR HH400X VP is powered by a rechargeable lithium-ion battery, providing convenience while minimizing the need for disposable batteries. The high-capacity battery ensures extended usage, making it a reliable companion for long boating trips.

In summary, the Cobra Electronics MR HH400X VP is a feature-rich handheld VHF radio that combines power, durability, and advanced technology. With its waterproof design, integrated GPS, and innovative features, it is a perfect choice for any serious boater looking for reliable communication on the open water.
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