How to Guide

ManualsBrandsUniden ManualsCar & Vehicle ElectronicsUniden UM435BK Advanced Fixed Mount VHF Marine Radio, All USA/International/Canadian Marine Channels including new 4-Digit, CDN “B” Channels, 1 Watt/25 Watt Power, Waterproof IPX8 Submersible, Black

While listening to a channel, adjust the

SQUELCH

knob until the noise is filtered out and

you can only hear the transmission. If you switch to a channel with a lot of noise or with a

weak transmission, you may need to adjust the squelch level again.

# NOTE: Setting the squelch level too high may prevent you from hearing weaker

transmissions. If you are having difficulty hearing a transmission, try setting the squelch

level lower.

Changing the Channel

Press

CHANNEL UP

and

CHANNEL DOWN

briefly to scroll through the channels one channel

at a time. Press and hold

CHANNEL UP

CHANNEL DOWN

to quickly scroll through the

channels.

Making a Transmission

To make a transmission, press and hold the microphone

PUSH TO TALK

button. Release the

PUSH TO TALK

button when you’re finished talking to let the other party respond.

x To prevent stuck microphone problems or situations where

PUSH TO TALK

is pushed

accidentally, the radio limits your talk time to 5 minutes in a single transmission. If you

talk for over 5 minutes continuously, the display shows RELEASE MIC BUTTON.

x For the best sound quality, hold the microphone about two inches away from your

mouth.

x You cannot transmit while the radio is in weather mode or scan mode.

x See the channel lists beginning on page 37 for a list of receive-only channels.

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In most situations, the 1 Watt transmission power is all you need. If you find yourself far

away from other stations and have trouble getting a response, you may need to boost the

transmission power from 1 Watt to 25 Watts:

1. Select the channel you want to transmit on.

2. Push and hold



for two seconds. The display shows 25 Watts in the upper

left hand corner.

3. The transmit power remains at 25 Watts until you change the setting back. Push and

hold



for two seconds. The display shows 1 Watt.

# NOTE: Don’t forget to change the transmission setting back to 1 Watt when you move

closer to other stations.

# NOTE: By default, when you change to channel 16, the radio automatically boosts the

power to 25 Watts. Be sure to change the power back to 1 Watt if you are not making an

emergency transmission.