Uniden UM55 VHF DSC Owner's Manual

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Year 2014

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Uniden UM55 VHF DSC Radio Specification

The Uniden UM55 VHF DSC Radio is a high-performance marine communication device designed for reliable and clear communication on the water. It operates on all USA, Canadian, and International marine channels, ensuring comprehensive coverage and connectivity. This radio features a built-in Digital Selective Calling (DSC) system, enhancing safety by enabling automated distress signaling and direct calling to other DSC-equipped vessels. The UM55 is equipped with a robust 25-watt output power, providing strong signal transmission over greater distances, while a one-watt setting is available for short-range communications.

The device incorporates a large, backlit LCD display that offers excellent visibility and readability in various lighting conditions. Its intuitive interface and tactile controls facilitate easy operation, even in challenging marine environments. The radio is also designed with a rugged, waterproof casing that meets IPX4 or better standards, ensuring durability and reliability in harsh weather conditions.

Additional features include a NOAA weather alert system that keeps users informed of changing weather conditions, and dual or triple watch modes that enable monitoring of multiple channels simultaneously. The UM55 also supports external GPS connectivity, enhancing its DSC functionality by providing precise location data during distress calls. With its comprehensive feature set and durable design, the Uniden UM55 VHF DSC Radio is a dependable choice for marine communication, ensuring safety and convenience for both recreational boaters and professional mariners.

Uniden UM55 VHF DSC Radio F.A.Q.

How do I perform a factory reset on my Uniden UM55 VHF DSC Radio?

To perform a factory reset, turn off the radio, press and hold the 'Channel' button while turning it back on, and wait for the display to show 'RESET'. Release the button to complete the reset.

What is the procedure for registering my MMSI number on the Uniden UM55?

Press the 'Menu' button, navigate to 'DSC Setup', select 'MMSI', and enter your 9-digit Maritime Mobile Service Identity number using the keypad. Confirm the entry to register.

How can I improve the reception quality on my Uniden UM55?

Ensure the antenna is correctly installed and is of appropriate length for the VHF band. Check all connections for corrosion or damage and replace if necessary.

What steps should I follow to update the firmware on my Uniden UM55?

Currently, the Uniden UM55 does not support user-updatable firmware. Contact Uniden support for any firmware-related inquiries.

Why is my Uniden UM55 not transmitting?

Check if the radio is set to international mode. Verify that the microphone is securely connected and that you are on a valid channel for transmission.

How do I initiate a DSC distress call using the Uniden UM55?

Press and hold the 'Distress' button for 3 seconds. The radio will automatically switch to Channel 70 and send the distress signal.

Can I connect an external speaker to the Uniden UM55?

Yes, you can connect an external speaker to the external speaker jack located at the rear of the unit. Ensure the speaker is compatible with the radio's specifications.

What maintenance is required to keep the Uniden UM55 in good condition?

Regularly check the antenna and connections for corrosion. Clean the exterior with a damp cloth and ensure the radio is dry after exposure to water. Store in a dry place when not in use.

Why does my Uniden UM55 display 'No GPS'?

Ensure that the GPS receiver is properly connected and has a clear view of the sky. Check for any obstructions that may be blocking the signal.

How do I adjust the squelch level on my Uniden UM55?

Turn the 'Squelch' knob clockwise until the background noise disappears and the signal is clear. Avoid setting it too high to prevent missing weak signals.