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Using Your Radio

Turning It On

Press and hold POWER for at least two seconds to turn the radio on. Press 

and hold POWER again to turn the unit off.

Setting It Up

Even though you can change your radio’s settings at anytime, you will 

probably want to establish initial settings after you have turned it on for the 

fi rst time. You will adjust some of these settings on an as-needed basis, but 

some settings might only need to be set once.

Changing the Volume

To change the speaker volume, press VOL/TX PWR to enter Volume Setting 

mode. 0 (for volume level 0 - 9) displays. Press CHANNEL UP or CHANNEL 

DOWN to increase or decrease the volume levels. Press VOL/TX PWR to 

save.

Setting the Squelch level

The MHS127 recognizes signals as transmissions if they exceed a signal 

strength threshold.

Adjusting the squelch sets this threshold level. Increasing squelch requires 

a signal to be stronger to be seen as a transmission. If you set the squelch 

too high, you will risk not receiving transmissions that are lower than that 

threshold. Reducing the squelch allows weaker signals to be accepted.

However, if you lower the squelch too much, you will hear white noise all the 

time

While listening to a channel, press SQL/UIC to enter Squelch Setting mode.

The SQUELCH Level (S0) number displays on the LCD. Press CHANNEL UP 

or CHANNEL DOWN to increase or decrease the squelch levels (0 - 3). Press 

SQL/UIC to save the setting.

Weak signals

No 

Squelch

Medium 

Squelch

High 

Squelch

Strong signals

Noise

19

Handheld VHF Marine Transceiver

UNIDEN MHS127

Summary of Contents for MHS127

Page 1: ...MHS127 Handheld VHF Marine Transceiver For more exciting new products please visit our website Australia www uniden com au New Zealand www uniden co nz ...

Page 2: ...gitude from your GPS 7 State the nature of your distress e g are you sinking medical emergency man overboard on fire adrift etc 8 State the type of assistance you need medical towing pumps etc 9 Give number of persons aboard and conditions of any injured persons 10 Estimate present seaworthiness of your ship e g how immediate is the danger due to flooding or fire or proximity to shore 11 Briefly d...

Page 3: ... 1hr Note this is not suitable for scuba diving The MHS127 will only meet this rating if fully assembled and all rubber seals are well maintained and correctly fitted This means that the carabiner clip is not connected and the battery cover securely fastened NOTE After your radio is submerged in water you might notice that the sound is distorted This is because there is still water remaining in an...

Page 4: ... Dual Watch 13 Scan Mode Operation 14 Using the radio in Scan Mode 14 Scan mode with Triple Watch or Dual Watch 15 Weather Mode 15 Using the radio in Weather Mode 15 Setting up the Hardware 16 Attaching the Antenna 16 Installing the Battery 16 Using the Alkaline Battery Tray 16 Mounting the Charger 17 Charging the Battery 18 Attaching the Belt Clip 18 Using Your Radio 19 Turning It On 19 Setting I...

Page 5: ...hlight 22 Turning the key beep on and off 22 Setting Key Lock 22 Using the external speaker Mic jack 23 Using the Battery Save feature 23 Maintenance and Troubleshooting 24 Specifications 26 Channels and Frequencies MHz 28 US Channel Frequencies and Names 28 Canadian Channel Frequencies and Names 30 International Channel Frequencies and Names 32 Regulations and Safety Warnings 34 Warranty 35 5 Han...

Page 6: ...ect Boost Lets you boost the transmitter power from 1W to 2 5W or 5W for added transmission distance Battery level display and low battery alert Dual Watch This mode lets you monitor Instant CH along with one regular marine channel Triple Watch This mode lets you monitor 16CH 67CH along with one regular marine channel Battery Save The Battery Save feature automatically turns off RX power at regula...

Page 7: ...ot included AC DC Charging Adaptor DC Charging Adaptor Screws Belt Clip If any items are missing or damaged contact your place of purchase immediately Never use damaged products Need help Get answers at our website www uniden com au for Australian model www uniden co nz for New Zealand model 7 Handheld VHF Marine Transceiver UNIDEN MHS127 ...

Page 8: ...lk Boost 16 67 Tri WX SOS DUAL LOCK Strobe SOS Light Speaker External Speaker and microphone jack Wrist strap anchor LCD Channel up VOL TX PWR SQL UIC Channel down INST SCAN MEM Microphone MHS127 Radio 8 Handheld VHF Marine Transceiver UNIDEN MHS127 ...

Page 9: ...ess Go to channel 67 3rd press Go back to the starting channel Turn Triple Watch on and off WX SOS Select WX channel Strobe SOS Light function Consecutive lighting function DUAL LOCK Select Dual Watch function Select Key Lock function Channel Up Move up channel or squelch volume one step at a time Move quickly up the channels squelch volume steps SCAN MEM Select Scan function Save a channel into m...

Page 10: ... wall AC plug Charging latches Reading the Display Charger The LCD display shows different information depending on what you are doing This sample screen shows some of this information The following table shows all the possible icons and what they mean Transmit power level This channel is stored in memory Watch mode The radio is in scan mode Key lock is on The radio is transmitting Current channel...

Page 11: ... radio is set for US channels CANadian channels or INTernational channels TRI or DUAL TRIple Watch or DUAL Watch is turned on MEM The current channel is saved in memory SCAN The radio is in Scan mode WX The weather channels are displayed The battery is fully charged mostly charged halfcharged mostly empty or completely empty 88A Current channel number 11 Handheld VHF Marine Transceiver UNIDEN MHS1...

Page 12: ...WX SOS In addition to the three operation modes your radio provides two 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 its previous operation Watch Mode What it does To turn it on off Dual Watch Checks Instant CH for activity every 2 seconds Press DUAL LOCK Triple Watch Checks cha...

Page 13: ...ange the transmit power press and hold TX PWR button The transmit power switches to the next transmit power each time you press and hold this button If you activate Triple Watch while operating in Normal mode the radio checks channels 16 and 67 every two seconds with Dual Watch turned on the radio checks Instant channel every two seconds The radio will not check channels 16 or 67 while you are act...

Page 14: ...SCAN MEM You must have at least two channels in memory to start a scan However you cannot save marine channel 70 or Weather channels You cannot transmit while in Scan mode To save a channel into memory select the channel then press and hold SCAN MEM The MEM icon displays whenever you tune to that channel To remove a channel from memory set the radio to that channel then press and hold SCAN MEM The...

Page 15: ...sing the radio in Weather Mode Press the WX SOS button to access Weather mode WX displays Press Channel Up and Channel Down to scroll through the weather channels To cancel Weather and return to the previous marine channel press the WX SOS button again The last active weather channel displays the next time you access Weather mode 15 Handheld VHF Marine Transceiver UNIDEN MHS127 Allows you to store...

Page 16: ...remove the battery check the rubber seal around the battery compartment Make sure the seal is seated in the groove and there is no dirt or debris on it If the seal looks worn or damaged contact customer service to order a replacement see front cover page for contact information NOTE Using the Alkaline Battery Tray The radio also comes with an alkaline battery tray that holds four AAA type alkaline...

Page 17: ...ll the alkaline battery tray in your radio just as you do the Li Ion Polymer battery see page 16 Follow these steps to use the alkaline battery tray WARNING The tray is designed to prevent the accidental charging of alkaline batteries Never use alkaline batteries in the radio without the alkaline battery tray Do not attempt to modify the battery tray design NOTE Mounting the Charger 1 Use the two ...

Page 18: ...o gets dirty or wet 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 above 45 C 113 F If the radio is powered down the battery can charge in about seven hours If the radio is powered on the battery takes longer to charge Important notes on charging the battery At...

Page 19: ...save Setting the Squelch level The MHS127 recognizes signals as transmissions if they exceed a signal strength threshold Adjusting the squelch sets this threshold level Increasing squelch requires a signal to be stronger to be seen as a transmission If you set the squelch too high you will risk not receiving transmissions that are lower than that threshold Reducing the squelch allows weaker signal...

Page 20: ...gh USA CANada or INTernational channel options Making a Transmission Selecting a channel Press Channel Up and Channel Down briefly to scroll through the channels one channel at a time Press and hold Channel Up or Channel Down to quickly scroll through the channels Making a Transmission Press and hold Push to Talk TX displays while you are transmitting Release Push to Talk when you re finished talk...

Page 21: ...he channel you want to transmit on 2 Press and hold TX PWR button to switch to the next transmission power level for example from 5W to 2 5W from 2 5W to 1W or from 1W back to 5W 3 The display shows the new transmission power The transmit power remains at the new setting until you change it again Some channels limit the transmission power to 1W When you tune to a limited power channel the radio au...

Page 22: ... hold WX SOS for 2 seconds SOS LED remains on continuously Flashlight mode Continuous Press and hold WX SOS for 2 seconds SOS LED turns off Using Your Radio Turning the key beep on and off Key beep is the tone that sounds when you press a key or a button You cannot change the key beep volume To turn key beep on or off press and hold Channel up or Channel down while turning on the radio You may nee...

Page 23: ...ls consult your dealer or contact Uniden Customer Care directly see front cover for contact information Using the Battery Save feature The Battery Save feature automatically turns off receive power at regular intervals to save battery power Battery Save turns off when receiving transmissions or transmitting a response It reactivates after 3 seconds of no activity transmit or receive Battery Save d...

Page 24: ... battery The radio won t transmit Make sure you are not in Weather or Scan mode Make sure you are not trying to transmit on a receive only channel or transmit at the wrong power level for this channel see the channel lists starting on page 28 Check the battery power level if it s low charge the battery before trying to transmit Make sure the duration of each transmission is less than 5 minutes I c...

Page 25: ...will flash if the radio is in a Watch mode or in Scan mode Try turning off scanning Triple Watch or Dual Watch see page 12 Where can I find my radio s serial number The serial number is on a plate inside the battery compartment 25 Handheld VHF Marine Transceiver UNIDEN MHS127 ...

Page 26: ...e Rechargeable Lithium Ion Battery 7 4V 1160 mAh Size without antenna 5 95 H x 2 40 W x 1 69 D inch 142 H x 61 W x 43 D mm Weight 9 9 oz 281g w battery and antenna Transmitter Frequency Range 156 158 MHz Frequency Stability 3 PPM nominal Power Output 1 0 W 2 5W 5W Spurious Emissions 50 dBm Current Drain 1300 mA 5W nominal Receiver Type Double Conversion Super Heterodyne Phase Locked Loop system fo...

Page 27: ...dio Frequency Response 5 0 dB 500 Hz 6 dB 2000Hz nominal Adjacent Channel Selectivity 80 dB 25 kHz nominal Audio Output Power 1 0 W 10 THD nominal Current Drain Squelched 38 mA Max Audio 230 mA nominal 27 Handheld VHF Marine Transceiver UNIDEN MHS127 ...

Page 28: ...mplex 1W Govt maritime control 18A 156 900 156 900 Simplex Commercial 19A 156 950 156 950 Simplex Commercial 20 161 600 157 000 Duplex Port operation 20A 157 000 157 000 Simplex Port operation 21A 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 Marine op...

Page 29: ...ion Ship Ship 78A 156 925 156 925 Simplex Non Commercial 79A 156 975 156 975 Simplex Commercial 80A 157 025 157 025 Simplex Commercial 81A 157 075 157 075 Simplex Coast Guard 82A 157 125 157 125 Simplex Coast Guard 83A 157 175 157 175 Simplex Government 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 S...

Page 30: ...00 156 800 Simplex Distress safety calling 17 156 850 156 850 Simplex 1W State Control 18A 156 900 156 900 Simplex Commercial 19A 156 950 156 950 Simplex Canadian Coast Guard 20 161 600 157 000 Duplex 1W Port Operation 21A 157 050 157 050 Simplex Canadian Coast Guard 22A 157 100 157 100 Simplex Canadian Coast Guard 23 161 750 157 150 Duplex Canadian Coast Guard 24 161 800 157 200 Duplex Marine Ope...

Page 31: ... 156 775 156 775 Simplex 1W Port Operation 76 156 825 156 825 Simplex 1W Port Operation 77 156 875 156 875 Simplex 1W Port Operation 78A 156 925 156 925 Simplex Inter Ship 79A 156 975 156 975 Simplex Inter Ship 80A 157 025 157 025 Simplex Inter Ship 81A 157 075 157 075 Simplex Canadian Coast Guard 82A 157 125 157 125 Simplex Canadian Coast Guard 83 161 775 157 175 Duplex Canadian Coast Guard 83A 1...

Page 32: ... 156 750 Simplex 1W Environmental 16 156 800 156 800 Simplex Distress safety calling 17 156 850 156 850 Simplex 1W Govt maritime control 18 161 500 156 900 Duplex Port operation 19 161 550 156 950 Duplex Commercial 20 161 600 157 000 Duplex Port operation 21 161 650 157 050 Duplex Port operation 22 161 700 157 100 Duplex Port operation 23 161 750 157 150 Duplex Marine operator 24 161 800 157 200 D...

Page 33: ...75 Simplex 1W Port operation 76 156 825 156 825 Simplex 1W Port operation 77 156 875 156 875 Simplex Port operation ship ship 78 161 525 156 925 Duplex Port operation 79 161 575 156 975 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 84 161 825 157 225 Duplex Ma...

Page 34: ...manual Using another charger may damage the battery or cause the battery to explode NOTE Li Ion Polymer batteries must be recycled or disposed of properly Avoid exposing the battery whether attached to the radio or not to direct sunlight heated cars or temperatures below 4 F 20 C or above 140 F 60 C Exposing the chemical contained within the battery pack to temperatures above 140 F 60 C may cause ...

Page 35: ...Zealand and will expire three 3 years from the date of the original retail sale If a warranty claim is made this warranty will not apply if the Product is found by Uniden to be A Damaged or not maintained in a reasonable manner or as recommended in the relevant Uniden Owner s Manual B Modified altered or used as part of any conversion kits subassemblies or any configurations not sold by Uniden Aus...

Page 36: ...to a major failure This warranty is in addition to and sits alongside your rights under either the COMPETITION AND CONSUMER ACT 2010 Australia or the CONSUMER GUARANTEES ACT New Zealand as the case may be none of which can be excluded Procedure for obtaining warranty service Depending on the country in which the Product was first purchased if you believe that your Product does not conform with thi...

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Page 38: ...38 Handheld VHF Marine Transceiver UNIDEN MHS127 ...

Page 39: ...39 Handheld VHF Marine Transceiver UNIDEN MHS127 ...

Page 40: ... 2014 Uniden Australia Pty Limited Uniden New Zealand Ltd Printed in Vietnam U01UT644CZA 0 ...

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