Uniden UM255 Owner'S Manual Download

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UM255

27MHz Radio

AM-Marine / AM-CB

For more exciting new products please visit our website:

Australia: www.uniden.com.au

Summary of Contents for UM255

Page 1: ...UM255 27MHz Radio AM Marine AM CB For more exciting new products please visit our website Australia www uniden com au ...

Page 2: ...0 Scanning Open Scan Group Scan 11 SCAN MEM 11 MENU 12 MENU DISPLAY BRIGHTNESS 12 MENU OS GS SCAN 12 MENU RF GAIN 12 MENU PA MODE 13 MENU CALL TONE 13 MENU ROGER BEEP 13 MENU KEY TONE 14 MENU SP MODE 14 MENU CONTRAST 14 SIREN 14 Installing the Hardware 15 Mounting the Radio 15 Installing an Optional Flush Mount Bracket 16 Connecting the Radio 16 Connecting Accessories 18 Connecting to an external ...

Page 3: ...tion Built in PA Output Connect optional PA speaker for Public Address and Siren Function Siren Alert Function Alert nearby vessels with connection of an optional PA speaker RF Gain Function Adjust to boost the strength on incoming signals ANL Automatic Noise Limiter Function Reduces unwanted signal noise for better clarity One Touch Channel 88 9 Recalling Instantly switch to the emergency Ch 88 M...

Page 4: ...Getting Started 4 What s Included UM255 Radio DC Power Cable Mounting Bracket and knobs Microphone Hanger and Mounting Hardware Getting Started CHANNEL ...

Page 5: ...88 9 DUAL Toggle channel between the current channel and CH88 in Marine band or CH9 in CB band Select Dual Watch Function SCAN MEM Select Scan function Memory or remove scan channel SIREN Siren tone one cycle output Siren tone output continually ANL CALL ANL Automatic Noise Limiter on off Initiate Call tone transmission CHANNEL ANL CALL SCAN MEM INST 88 9 DUAL MENU SIREN SQUELCH ASQ knob turn cloc...

Page 6: ...d for power boats Connecting the radio page 16 Power connector Nominal 13 8 VDC power supply with negative ground 10 8 VDC to 15 6 VDC Red wire black wire Connecting the radio page 16 PA connector External PA Public Address speaker optional Connecting accessories page 18 Speaker connector External speaker optional Connecting accessories page 18 Antenna Connector SO238 Heat sink PA Connector Power ...

Page 7: ...DUAL WATCH Toggle channel between the current channel and CH88 in Marine band mode or CH9 in CB band mode Select Dual Watch Function CHANNEL UP Move up one channel at a time Move quickly up the channels CHANNEL DOWN Move down one channel at a time Move quickly down the channels PTT PUSH TO TALK Button 88 9 DUAL WATCH Button CHANNEL UP DOWN Buttons Parts of the Radio ...

Page 8: ...tons of the main unit while turning power on Turn the VOLUME PWR knob clockwise to increase the speaker volume turn it counter clockwise to decrease the volume Setting the Volume Setting the Squelch Level Manual Squelch The squelch feature reduces the level of static on the speaker by filtering out the background channel noise At the lowest squelch level the speaker plays all radio signals includi...

Page 9: ...through the channels one channel at a time Press and hold the CHANNEL UP or CHANNEL DOWN button to quickly scroll through the channels Enabling the Auto Squelch ASQ Use the Auto Squelch and the raido will be optimised to hear medium to stong nearby signals Turn the SQUELCH ASQ knob to the ASQ position to enable Auto Squelch mode The AQ icon appears on the display when ASQ is enabled Making a Trans...

Page 10: ...nnel 9 CB Band mode Press 88 9 DUAL on the handset or base Dual Watch Dual Watch will monitor the Instant Priority Channel and the current channel for activity Dual Watch is suspended when there is activity and resumes after activity ceases Press and hold 88 9 DUAL on the handset or base The DW icon appears and a short tone beep is heard To cancel Dual Watch press and hold 88 9 DUAL on the handset...

Page 11: ...es the accessory feature Priority Watch which allows you to monitor the Instant Priority Channel while scanning If the Instant Priority Channel becomes active the radio will stay on that channel for as long as the signal is present If the received signal ceases GS Scanning continues after 3 seconds If scanning stops on a channel which is not the Instant Priority Channel the UM255 will continue mon...

Page 12: ...ual squelch Press MENU three times the RF Gain setting flashes on the display Press CHANNEL UP or CHANNEL DOWN button to select a desired RF Gain level total 9 levels The R icon displays whenever the RF Gain is enabled not set to OFF Press and hold MENU to save the setting and exit menu mode Press MENU two times the OS GS Scan setting flashes on the display Press CHANNEL UP or CHANNEL DOWN button ...

Page 13: ...shes on the display Press CHANNEL UP or CHANNEL DOWN button to select PA ON or OFF Press and hold MENU to save the setting and exit menu mode If PA setting is ON the display shows PA Pressing 88 9 DUAL also cancels PA mode and changes to the channel to CH88 or CH9 To use the PA Feature Press and hold the microphone PTT button Speak clearly in your normal voice you don t have to shout Use VOLUME PW...

Page 14: ...cle or continuous siren Press SIREN or PTT key The UM255 stays in the PA mode Pressing 88 9 DUAL also cancels the siren and changes to CH88 or CH9 The siren volume via PA speaker cannot be controlled The siren volume via Front speaker Microphone speaker can be controlled SIREN MENU CONTRAST Press MENU nine times the Contrast setting flashes on the display Press the CHANNEL UP or CHANNEL DOWN butto...

Page 15: ...ar of the radio Avoid interference with the ship s compass Installing the Hardware 1 Install the radio into the mounting bracket and connect the power cable and accessory cable 2 Position the radio into the desired location Mark the edges of the bracket on the mounting surface 3 Remove the mounting bracket drill template from the back of the manual and use the template to mark the drill holes on t...

Page 16: ... negative ground 10 8 VDC to 15 6 VDC Power leads should be kept as short as possible A direct connection to the power supply is ideal Minimum of 14 AWG copper wire for extensions up to 6m 12 AWG wire for extensions from 6m to 10m or 10 AWG wire for extensions from 10 to 18m Male PL 259 connector 50 Ω impedance Minimum 1 2m 3 dB rated antenna for sailboats or 2 4m 6dB rated antenna for powerboats ...

Page 17: ... of the UM255 The power connector only fits one way 4 NOTE To extend the life of the radio use waterproof tape to seal electrical connections 5 Install your antenna according to the manufacturer s instructions 6 See Antenna Selection and Installation on page 23 for more details 7 Connect the PL 259 connector from the antenna lead in wire to the SO238 connector labeled ANTENNA on the back of the UM...

Page 18: ...ries Connecting to an external PA speaker You can use an external PA speaker to monitor the radio from a different part of your boat or in a noisy environment The UM255 supports an external PA speaker with the following specifications Minimum impedance of 4 Ohms Minimum power handling of 10 Watts 1 The External PA Speaker connection is a standard 3 5mm audio pin connection NOTE To extend the life ...

Page 19: ...t is probably too low I can t hear anything no vol ume from the speaker Adjust the squelch level it is probably too high I can transmit but no one can hear me Check your band setting see Setting the Band AM Marine mode AM CB mode on page I can t read the display Adjust the contrast level see page 14 The display is too bright at night Adjust the display brightness level see page 12 Where can I find...

Page 20: ...ep on Memory channel Squelch Auto Squelch PA and Channel Display Display LCD Dot Matrix Buttons MENU Keylock Channel UP Channel DOWN INST 88 9 DUAL ANL CALL SIREN and SCAN MEM Connectors and Cables Antenna Ext SPKR Ext PA and DC power Size H 66 mm x W 162 mm x L 100 mm Weight 1 0 kg Supply Voltage Nominal 13 8V DC negative ground 10 8 VDC to 15 6 VDC Standard Accessories Mounting bracket and hardw...

Page 21: ...e 50 Ω nominal Microphone 2 kΩ condenser mic element with coiled cord Speaker 45mm 8 Ω 2W Operating Temperature Range 0 C to 50 C Transmitter Power Output 4 watt Frequency Range 26 965 to 27 980 MHz Receiver Frequency Range 26 965 to 27 980 MHz ...

Page 22: ... on the CH Channel and Frequencies Table 6 Australian 27MHz AM CB Channels Frequencies Ch No Freq MHz Use Ch No Freq MHz Use 1 26 965 General 21 27 215 General 2 26 975 General 22 27 225 General 3 26 985 General 23 27 255 General 4 27 005 General 24 27 235 General 5 27 015 General 25 27 245 General 6 27 025 General 26 27 265 General 7 27 035 General 27 27 275 General 8 27 055 Road 28 27 285 Genera...

Page 23: ...ntenna used with this radio should be installed using the following guidelines to ensure a safe distance between the antenna and persons close by Small whip antennas 3 dB or smaller should be installed at least 1m away from any area where people are likely to be Larger antennas 6 dB or 9 dB should be installed at least 2m away While the radio is transmitting do not come closer to the antenna than ...

Page 24: ...rated data including but without limitation phone numbers addresses and images that may be stored on your Product Statement of Remedy If the Product is found not to conform to this warranty as stated above the Warrantor at its discretion will either repair the defect or replace the Product without any charge for parts or service This warranty does not include any reimbursement or payment of any co...

Page 25: ...25 Mounting Bracket Template 22 mm 156 mm 5 5 mm 17 5 mm 22 mm 40 mm 34 mm 7 mm 43 mm 7 mm ...

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Page 28: ... 2020 Uniden Australia Pty Limited Printed in PRC ...

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