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E-18

Uniden MHS125 Radio Owner’s Manual

While listening to a channel, adjust the 

SQUELCH

 knob until 

the noise is filtered and you can hear only the transmission. 

If you switch to a channel with a lot of noise or a weak trans-

mission, you may need to readjust 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 the 

Channel Up

 and 

Channel Down

 buttons briefly to 

scroll through the channels one channel at a time. Press and 

hold the 

Channel Up

 or 

Channel Down

 button to quickly 

scroll through the channels.

Making a transmission

Select the channel you want to transmit on, then press and 

hold the 

Push to Talk

 button. Release the 

Push to Talk

 

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

respond. 

To prevent stuck microphone problems or situations where 

the 

Push to Talk

 button is pushed accidentally, the radio 

limits your talk time to 5 minutes in a single transmission.

For the best sound quality, hold the microphone about two 

inches away from your mouth.

See the channel lists starting on page E-23 for a list of 

receive-only channels.

Boosting the transmission power

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 2.5 Watts or 5 Watts:

Select the channel you want to transmit on. 

1.

Summary of Contents for MHS125

Page 1: ...MHS125 RADIO VHF MARITIME FLOTTANTE GUIDE D UTILISATION FLOATING VHF MARINE RADIO OWNER S MANUAL...

Page 2: ...and longitude from your GPS State the nature of your distress e g sinking medical emergency man overboard on fire adrift etc State the type of assistance you need medical towing pumps etc Give the nu...

Page 3: ...ez les coordonn es de longitude et de latitude apparaissant sur votre dispositif GPS R v lez la nature de votre d tresse par exemple nous sommes en train de couler urgence m dicale un homme la mer un...

Page 4: ...ther mode with Weather Alert Watch E 12 Weather mode with Triple Watch or Dual Watch E 13 Setting Up the Hardware E 13 Attaching the Antenna E 13 Installing the Battery E 13 Using the Alkaline Battery...

Page 5: ...r your radio is submerged in water you might notice that the sound is distorted This is because there is still water remaining in and around the speaker and microphone Just shake the radio to clear ex...

Page 6: ...battery alert Dual Triple and Quad Watch operation These different watch modes let you monitor up to two Coast Guard Distress Hailing channels and one weather channel along with one regular marine cha...

Page 7: ...r damaged contact Uniden Customer Service see back cover for contact information For information on available accessories visit www uniden com Antenna MHS125 Radio Charger AC Adapter DC Adapter Alkali...

Page 8: ...ap anchor Channeldown button UIC Lockbutton Mem memory SOSbutton Strobe SOS light Antenna LCD display 1 2 5 5W button Channelup button Volume power knob Turn clockwise to increase volume Microphone 16...

Page 9: ...nnel from memory Turns strobe SOS light on and off UIC Lock Switch from US to Canadian or international channels Lock the keys press and hold again to unlock Channel Up Move up one channel at a time M...

Page 10: ...channel is saved in memory The radio is in Scan mode The radio is in Weather mode Weather Alert Watch is turned on The battery is fully charged mostly charged half charged mostly empty or completely...

Page 11: ...on modes your radio provides four different watch modes which you can activate during any operation mode In the watch modes the radio briefly checks for activity on a specific channel then returns to...

Page 12: ...channel at a time Press and hold the button to scroll quickly down the channels To change the transmit power press the 1 2 5 5W button The transmit power switches to the next transmit power each time...

Page 13: ...onitor four channels at once Quad Watch The radio performs the Triple Watch and Weather Alert Watch checks at their scheduled time 09 16 09 16 09 16 Every 2 seconds the radio checks channels 9 16 Trip...

Page 14: ...n The MEM icon displays whenever you tune to that channel To remove a channel from memory set the radio to that channel then press the MEM SOS button The MEM icon no longer displays When the radio sta...

Page 15: ...You can activate Weather Alert Watch and Triple Dual Watch at the same time The radio performs both checks at their scheduled time Every 7 seconds the radio checks the last used weather channel then s...

Page 16: ...eather Alert Watch to check the weather channel every seven seconds If you activate Weather Alert Watch while operating in weather mode it operates as a type of sleep mode the radio stays on the weath...

Page 17: ...for shipping safety the battery is not installed at the factory The empty alkaline battery case is installed as a placeholder Insert the hook on the battery into the notch at the top of the battery co...

Page 18: ...eries such as Duracell Ultra batteries NOTE When using alkaline batteries transmit power is limited to a maximum of 2 5W Follow these steps to use the alkaline battery case Hold the lower part of the...

Page 19: ...e radio without the battery case Do not attempt to modify the battery case design Mounting the Charger You can mount the charger on any flat surface Use the two holes at the base of the charger as a t...

Page 20: ...the battery Charge the battery fully before using the radio When the battery is completely charged the CHARGE LED turns green Don t use the charger when the ambient temperature is below 0 C 32 F or a...

Page 21: ...turn it counter clockwise to decrease the volume Setting the Squelch Level The squelch feature reduces static on the speaker by filtering out any background channel noise At the lowest squelch level...

Page 22: ...h the channels Making a Transmission Select the channel you want to transmit on then press and hold the Push to Talk button Release the Push to Talk button when you re finished talking to let the othe...

Page 23: ...annel lists starting on page E 23 for a list of power restricted channels In an emergency if you press and hold the Push to Talk switch while briefly pressing the1 2 5 5W button the power level change...

Page 24: ...off the radio and then press and hold the Channel Up or Channel Down button while turning ON the radio again Using the External Speaker Mic Jack You can connect an optional external speaker mic to thi...

Page 25: ...mperature is below 0 C 32 F or above 45 C 113 F Make sure the charging contacts on the radio and charger are clean Replace the battery The radio won t transmit Make sure you are not in weather or scan...

Page 26: ...Watch Triple Watch or Dual Watch see page E 7 Where can I find my radio s serial number The serial number is on a plate inside the battery compartment Specifications General Channels All US Internatio...

Page 27: ...0 12 V Audio Frequency Response 6 dB 500 Hz 6 dB 2000Hz Adjacent Channel Selectivity 70 dB 25 kHz Audio Output Power 0 34 W 10 THD Current Drain Squelched 38 mA Max Audio 160 mA Channels and Frequenc...

Page 28: ...157 050 157 050 Simplex Coast guard only 22A 157 100 157 100 Simplex Coast guard 23A 157 150 157 150 Simplex Coast guard only 24 161 800 157 200 Duplex Marine operator 25 161 850 157 250 Duplex Marin...

Page 29: ...tor 86 161 925 157 325 Duplex Marine Operator 87 157 375 157 375 Simplex Marine Operator 88 157 425 157 425 Simplex Commercial Ship Ship Canadian channel frequencies and names Canadian Marine Channels...

Page 30: ...erator 25 161 850 157 250 Duplex Marine Operator 26 161 900 157 300 Duplex Marine Operator 27 161 950 157 350 Duplex Marine Operator 28 162 000 157 400 Duplex Marine Operator 60 160 625 156 025 Duplex...

Page 31: ...x Canadian Coast Guard 84 161 825 157 225 Duplex Marine Operator 85 161 875 157 275 Duplex Marine Operator 86 161 925 157 325 Duplex Marine Operator 87 157 375 157 375 Simplex Port Operation 88 157 42...

Page 32: ...t operation 23 161 750 157 150 Duplex Marine operator 24 161 800 157 200 Duplex Marine operator 25 161 850 157 250 Duplex Marine operator 26 161 900 157 300 Duplex Marine operator 27 161 950 157 350 D...

Page 33: ...Duplex Port operation 80 161 625 157 025 Duplex Port operation 81 161 675 157 075 Duplex Port operation 82 161 725 157 125 Duplex Port operation 83 161 775 157 175 Duplex Port operation 84 161 825 157...

Page 34: ...a license application from your nearest FCC field office for US users or Industry Canada for Canadian users Basic Radio Guidelines You should familiarize yourself with the rules on marine radios and...

Page 35: ...st be approved in writing by Uniden Changes or modifications not approved by Uniden could void the user s authority to operate the equipment FCC RF Exposure Information In August 1996 the Federal Comm...

Page 36: ...e held 1 inch from the user s face The use of accessories that do not satisfy these requirements may not comply with FCC RF exposure requirements and should be avoided For more information about RF ex...

Page 37: ...t maintained as reasonable or necessary B modified altered or used as part of any conversion kits subassemblies or any configurations not sold by Uniden C improperly installed D serviced or repaired b...

Page 38: ...L REMEDIES This warranty gives you specific legal rights and you may also have other rights which vary from state to state This warranty is void outside the United States of America PROCEDURE FOR OBTA...

Page 39: ......

Page 40: ...MHS125 Radio Owner s Manual UTZZ01631ZA QUESTIONS Contactez nous au www uniden com ou appelez 1 800 297 1023 Imprim en Chine QUESTIONS Visit our website at www uniden com or call 1 800 297 1023 Print...

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