Controls and Indicators... 2 Warning! ... 4 Introduction ... 5 Features ... 5 Technical Support and Service ... 6 Maritime Radio Services Operation ... 6 Included in Your Package ... 7 Getting Started ... 8 Attaching the Antenna ... 8 Installing the Alkaline Battery Case ...
• The MH 120 is waterproof only when both the antenna and the battery are properly attached. • Do not operate the transmitter of any radio equipment unless all the Radio Frequency (RF) connectors are secure and any open connectors are properly terminated. •...
The MH 120 is a waterproof, portable two-way VHF transceiver. It is compact, lightweight, rugged and fits easily in your hand. This handheld VHF marine radio will give you consistent, outstanding performance in virtually all conditions and situations. To ensure that you get the most from the MH 120’s features, please read this operating guide carefully before using the unit.
Be sure that a qualified technician services your radio equipment. Caution: Changes or modifications to this product not expressly approved by Uniden, or operation of this product in any way other than as detailed by this Operating Guide, can void your authority to operate this product.
MH 120 Antenna (HH9408) Beltclip Wrist Strap (RETC484647Z) Reference Guide/ Alkaline Battery Case Printed Material (attached to the MH 120) If any of these items are missing from the box, contact your Uniden Dealer or the Uniden Parts Department at (800)-554-3988.
Attaching the Antenna Apply the antenna to the radio as shown. Be sure the antenna is firmly seated. Installing the Alkaline Battery Case Snap the battery release clip out and remove the alkaline battery case. Remove the battery case cover by pulling the 2 halves apart applying your fingers to the projections.
Attaching the Beltclip Hold the beltclip in the direction as illustrated. Apply it to the hanger piece on the back of the radio. Then slide it up. When you hear a click, the beltclip is firmly attached. To take the beltclip off the radio, turn it upside down and slide it up.
• See “Controls and Indicators” (page 2) for button, knob, and key positions. • When you turn On your MH 120 just after purchasing, it is automatically tuned to channel 16, the United States Coast Guard frequency for distress, safety, and calling. •...
Selecting a Channel Turn On your MH 120. To select a higher channel, press the L button. To select a lower channel, press the M button. • To change the channel continuously, press and hold the L or M button for more than 1 second.
Triple Watch Triple Watch mode monitors channels 16 and 9 for a signal while you listen to the currently selected channel. The marine radio checks channel 16 and 9 for activity every 2 seconds. To select Triple Watch mode, press and hold the 16/9/TRI button for 2 seconds.
Monitoring Weather Channels The MH 120 has 10 preprogrammed emergency/weather channel frequencies, represented by 0 through 9. To listen to the emergency/weather channels in your area, press the WX/ALERT button. WX appears on the display. To move up, press the L button. To move down, press the M button.
Emergency/Weather Alert Emergency/Weather Alert allows your MH 120 to function as a severe weather warning radio and will also alert you to any local or national emergencies. If the NOAA issues warning while this feature is turned On, the radio sounds an alert tone. You will then hear the emergency/weather broadcast.
USA, International and Canadian Channels The MH 120 is initially set for USA marine channels when you turn On your radio. To listen to international marine channels, press the UIC button once. INT appears on the display. To listen to Canadian marine channels, press the UIC button again.
Deleting a Channel from Memory Select the channel to delete from memory by pressing the L or M button. Press the MEM button. MEM disappears from the display. Scanning To begin scanning the programmed channels, press the SCAN button. SCAN and TRIPLE appear on the display.
Transmitting Transmission power can be set to either 5W or 1W. Press the 1/5W/LOCK button to make the change, then the 5W or the 1W indicator on the display changes accordingly. To transmit, press and hold the PTT (push-to-talk) key. TX appears on the display.
Battery Indicator When the unit is On, battery power is always indicated on the display. When the battery is fully charged, the battery indicator appears as follows: When the battery is nearly discharged, the battery indicator appears as follows: • When the battery indicator drops to the blinking 1-mark level on the display, the radio will receive but will not transmit.
Mounting Screws Antenna Wrist Strap (BADY0510001) (HH9408) (RETC484647Z) DC Adapter Ni-MH Battery Cradle Reference Guide (BP 250) Beltclip Alkaline Battery Case Uniden Parts Department (800)-554-3988 Hours: M-F 8:00AM to 5:00PM CST We can also be reached on the web at www.uniden.com...
General Channels Transmit and Receive Weather Freq. Control Freq. Tol. Transmit Receive Oper. Temp. Antenna Microphone Display Speaker Power Source Size (without antenna) Weight (w/ antenna) Transmitter (w/ Ni-MH battery) Frequency Range Frequency Stability Power Output Spurious Emissions Current Drain Receiver (w/ Ni-MH battery) Receiver Type Frequency Range...
Not enough range Cause: Line of sight blocked Increase antenna height. Will not transmit on 5 watt range but will transmit on the 1 watt range. Cause: Low voltage Install new batteries. Troubleshooting...
For more information about RF exposure, please visit the FCC website at www.fcc.gov. • When using an external speaker microphone, USE ONLY THE UNIDEN MODEL HHVTA07 (black) or HHVTAW07 (white). Use of any other accessory for this purpose may invalidate your authority to operate this device.
Uniden service center for a defect or malfunction covered by this warranty, (E)used in any conjunction with equipment or parts or as part of any system not manufactured by Uniden, or (F)installed or programmed by anyone other than as detailed by the Operation Guide for this product.