Uniden UH7740NB Owner'S Manual Download

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Preventive Maintenance

The following system checks should be made every six to twelve months:

•

Check the Standing Wave Ratio (SWR).

•

Inspect the tightness of all electrical connections.

•

Inspect the antenna coaxial cable for wear or breaks on the shielding.

•

Inspect the tightness of all screws and other mounting hardware.

Troubleshooting

Should the unit malfunction or perform poorly, follow these procedures:

If the transceiver is completely inoperative: Check the power cord and fuse.

If there is trouble with receiving: Check the VOLUME control setting. Be sure the

SQUELCH is adjusted properly. Possibly the radio is over-squelched.

If there is trouble with transmitting: Check that the transmission line (coaxial cable)

is securely connected to the ANTENNA connector. Check that the antenna is fully

extended for proper operation. Check that all transmission line (coaxial cable)

connections are secure and free of corrosion.

NOTE

Blackening may occur on the Liquid Crystal Display if the UHF CB

Radio or optional Remote SPK/MIC has been subjected to extreme high

temperature (above 60°C). This is not a fault. Normal LCD operation

resumes when the temperature stabilizes back to standard operating

condition (0-55°C).

Introduction

UNIDEN UH7740NB UH7750NB

UHF CB Transceiver

Summary of Contents for UH7740NB

Page 1: ...UH7750NB UHF CB Transceiver Downloaded from www cbradio nl ...

Page 2: ...ansmitting 20 Call Function 20 Dual Watch 20 Using Repeater Channels 21 Operating the UHF CB Radio in Duplex Mode 22 Scanning 22 Open Scan OS Mode 23 Group Scan GS Mode 23 Priority Watch 24 Add Remove Channels from SCAN Memory 24 50 RX Channels 25 Manual Programming 25 Deleting a programmed RX Channel frequency 25 Selecting the Call tone 26 Busy Channel Lockout 26 Roger Beep 27 Beep On Off 27 CTCS...

Page 3: ... Signal Strength Power Meter Instant Channel Programming One touch Instant Channel recalling Dual Watch with Instant Channel Duplex Capability from CH01 CH08 and CH41 CH48 per channel Group Scan and Priority Channel Watch Open Scan Scan Channel Memory On Off separately with Open Scan Group Scan Rotary Channel Select Busy Channel Lock out Function Roger Beep Function On Off 5 Different Call Tones 3...

Page 4: ...E control setting Be sure the SQUELCH is adjusted properly Possibly the radio is over squelched If there is trouble with transmitting Check that the transmission line coaxial cable is securely connected to the ANTENNA connector Check that the antenna is fully extended for proper operation Check that all transmission line coaxial cable connections are secure and free of corrosion NOTE Blackening ma...

Page 5: ...ENU ENTER Menu and Select Button 3 DUAL Dual Watch MON Monitor Button 4 DCS CTCSS DCS and CTCSS Tone Button 5 MEM Memory Scan Channels 6 SCAN Scan On Off OS GS Open or Group Scan 7 Liquid Crystal Display LCD 8 SQ Rotary Squelch control 9 VOL Rotary Volume control ON OFF On Off PUSH control 10 MIC Front Microphone Jack 2 3 4 5 6 7 7 8 9 10 1 2 1 3 4 5 8 6 10 9 ...

Page 6: ...rs 6 UNIDEN UH7740NB UH7750NB UHF CB Transceiver UH7740NB Rear View Connectors 11 Rear MIC Jack 12 UHF Antenna Connection 13 Power Input Connection 13 8VDC 14 Ext Speaker Jack UH7750NB Rear View 13 11 12 14 11 13 12 14 ...

Page 7: ...740NB UH7750NB UHF CB Transceiver 15 16 17 30 31 21 Standard Microphone Controls and Connectors 15 CALL Call Tone Button 16 INST Instant Channel Button 17 PTT Push To Talk Button 21 MICROPHONE 30 RJ45 type plug 31 Front MIC Jack Cover ...

Page 8: ...enu and Select Button 19 MEM Memory Scan Channel 20 SCAN Scan Button OS GS Open Scan Group Scan 21 MICROPHONE 22 SPEAKER 23 Liquid Crystal Display LCD 24 VOL Volume Up Button 25 VOL Volume Down Button 26 POWER Power ON OFF Button 27 SQL Auto Squelch MON Monitor Button 28 DCS CTCSS DCS CTCSS Button DUAL Dual Watch Button 29 Select Up and Down Buttons 30 RJ45 type plug 31 Front MIC Jack Cover 15 17 ...

Page 9: ...s 1 TX Transmit 2 DUAL Dual Watch 3 SCAN Scan mode 4 Channel Frequency 5 GS Group Scan 6 INST Instant Channel 7 PRI Priority Channel 8 M Channel in Memory 9 Channel Number 10 DCS CTCSS Code Number 11 S RF Receive Signal or Transmit 12 Signal Power Level 13 CTCSS Continuous Tone Coded Squelch System 14 BCL Busy Channel Lockout 15 VSc Volume Synch 16 DCS Digital Coded Squelch 17 MON Monitor 18 RSQ R...

Page 10: ...racket Mounting Screws Washer Stars And Screws UH7740NB only Quick Release Bracket UH7740NB only Mounting Bracket Mounting Screws Washer Stars And Screws UH7750NB only DIN E Sleeve DIN E rubber ring and keys for vehicle installation UH7750NB only DC Power Cord with fuse UH7740NB UH7750NB UHF CB Transceiver For more exciting new products please visit our website Australia www uniden com au New Zeal...

Page 11: ...unting Kit DMK7740 for compact models Remote LCD Speaker Microphone RM770 External Speaker MS200 w noise filter or MS100 BTMIC KIT Bluetooth MIC BM100 and Remote PTT with Earpiece MIC Extension cable kit for Remote LCD Speaker Microphone EC770 and Microphone Jack Rubber Cover ...

Page 12: ...eve into the opening in your dashboard lip facing out 3 Push out the top and bottom tabs to hold the sleeve firmly in place 4 Remove the rubber ring fitted around the cabinet sides near the front of the UH7750NB Store the rubber ring in a safe place for future use 5 Before inserting the UH7750NB in the sleeve attach the cable from the previously mounted antenna Attach the DC Power leads RED goes t...

Page 13: ... plan to remove the UH7750NB from the DIN E sleeve This is easily done using the provided Removal Keys Fully insert both Removal Keys straight into the slots on the left and the right edges of the radio s dress panel You cannot remove the radio if only one key is available Press in fully and the radio will unlock from the sleeve making withdrawal from the sleeve possible Store the keys in a safe p...

Page 14: ...carefully press the lock tab at the bottom UH7750NB or left UH7740NB side of the MIC plug and push it upwards UH7750NB or to the right UH7740NB At the same time tug on the MIC cord to draw back the MIC plug Rear MIC Jack Use the Rear MIC Jack if the main base is mounted where a front MIC connection is intrusive or if you wish to use the Remote LCD Speaker MIC with an optional extension cable Peel ...

Page 15: ...table mounting position and mark and drill two 3mm holes Fix the MIC Hanger into place with screws Conventional Mounting with Double Sided Tape not supplied High quality Double Sided tape can be found at good retail stores Secure the front and back pieces of the MIC Hanger using the supplied binding screws Locate a suitable mounting position Apply high quality Double Sided tape onto the flat area ...

Page 16: ...equired and can be cut away or pushed out of the way along the cable 2 Drill a 13mm hole at the MIC hanger location 3 Thread the microphone plug through the hole and connect with the extension cable 4 Mount the MIC Hanger over the hole and cable 5 At the Radio Connect the extension cable plug to the rear MIC Jack Fit the rubber bushing over the front MIC jack Microphone Radio Extension Cable 2 1 5...

Page 17: ... the Remote SPK MIC Setting the Volume Turn the volume control at the base or press the volume on the side of the optional Remote SPK MIC to adjust the volume The base volume is composed of 42 steps and the optional Remote SPK MIC is 7 steps See Volume Sync on page 27 to synchronize the volume control when the optional Remote SPK MIC is connected ...

Page 18: ...ch is selected SQT icon will also flash 3 Press MENU ENTER to store the setting Think of the squelch control as a gate If you turn Squelch fully clockwise it raises the Squelch gate so high that no signals get through Think of the squelch control as a gate If you turn Squelch fully clockwise it raises the Squelch gate so high that no signals get through To set the Squelch Gate to the desired level...

Page 19: ...d DUAL MON at the base or SQL MON on the Remote SPK MIC again to cancel Selecting a Channel Turn the Rotary Channel Selector at the base or press on the Remote SPK MIC to select the desired channel NOTE For your reference a list of the available channels corresponding frequencies and guidelines for their use is printed on page 31 For Australia Channels 05 and 35 are reserved for Emergency Calls ...

Page 20: ...lect the desired channel Press the microphone s PTT button and speak normally into the microphone Hold it approx 7cm from your mouth Release the PTT button to end the transmission and listen for a reply Call Function Press the microphone CALL Button A three second ringing tone will be transmitted You may select from 5 types of tones see p 26 NOTE Current regulations require calling tones to be res...

Page 21: ...iving the signal is very slim Hills tall buildings metallic structures etc tend to act as a screen between radios The signal coming from your radio is received by the Repeater Station and the re transmitted at the same time on another channel This operation is called Duplexing For example CH01 on Duplex Mode will Receive on CH01 but Transmit on CH31 CH02 on Duplex Mode will Receive on CH02 but Tra...

Page 22: ...ng 4 Press and hold MENU ENTER to exit from the menu mode Only channels 01 08 and 41 48 are available for Duplex NOTE Check with your local Retailer for information on available repeaters Scanning The UHF CB Radio has a scanning feature that allows you to search for active channels automatically Furthermore the UHF CB Radio is designed to have two types of scanning Open Scanning OS and Group Scann...

Page 23: ... UHF CB Radio will reinstate the starting channel NOTE OS Mode is indicated by the absence of the GS icon Group Scan GS Mode Includes the accessory feature Priority Watch which allows you to monitor the Instant Priority Channel while scanning see p 20 for setting Instant Priority Channel and p 24 to turn on Priority Watch To use GS Mode Scanning press and hold SCAN OS GS GS icon appears on the dis...

Page 24: ...uned to an active channel the UHF CB Radio will stay on that active channel If none of the channels are active the UHF CB Radio will reinstate the scan start channel NOTE If OS GS Scanning is initiated when there are no channels programmed in OS GS memory an error tone will be heard and scanning will not start see Programming Scan Channels below Add Remove Channels from SCAN Memory Select which Sc...

Page 25: ...he base or press on the Remote SPK MIC to select the desired MHz Press MENU ENTER and SCAN OS GS at the base or OS GS SCAN and DCS CTCSS DUAL on the Remote SPK MIC to change from the MHz digits to the kHz digits of the frequency turn the rotary channel selector at the base or press on the Remote SPK MIC to select the desired kHz When finished press MEM The channel indictor flashes Turn rotary chan...

Page 26: ...in 10 seconds the UHF CB Radio will automatically exit the Menu Mode Busy Channel Lockout If the channel is already in use you can prevent the UHF CB Radio from transmitting This is particularly important when using CTCSS DCS 1 Press MENU ENTER four times The BCL setting flashes 2 Turn the Rotary Channel Selector at the base or press on the Remote SPK MIC to change the setting between ON or OFF 3 ...

Page 27: ...TER to store the setting 4 Press and hold MENU ENTER to exit from the menu mode NOTE If a button is not pressed within 10 seconds the UHF CB Radio will automatically exit the Menu Mode Beep On Off 1 Press MENU ENTER six times The Beep setting flashes 2 Turn the Rotary Channel Selector at the base or press on the Remote SPK MIC to change the setting between ON or OFF 3 Press MENU ENTER to store the...

Page 28: ...lect the desired CTCSS code 01 38 Press DCS CTCSS once to store the new setting To turn off CTCSS or DCS select the oF code during setting DCS Digitally Coded Squelch DCS is a digital extension of CTCSS It provides 104 extra digitally coded squelch codes that follow after the 38 CTCSS codes CTCSS 1 38 followed by DCS 1 104 Follow the steps for setting a CTCSS code Turn the Rotary Channel Selector ...

Page 29: ...de NOTE When volume sync function is active the volume of base and Remote SPK MIC are synchronized Volume sync function can be used only when the optional Remote SPK MIC is connected Backlight Colours 1 Press MENU 8 times The Backlight setting flashes 2 Turn the Channel Selector or press to change the setting between Blue Red Purple magenta Green Cyan Yellow and Clear white 3 Press MENU to store t...

Page 30: ...10 high contrast 3 Press MENU ENTER to store the setting 4 Press and hold MENU ENTER to exit from the menu mode NOTE The base LCD has a fixed contrast which cannot be changed Backlight Brightness 1 Press MENU ENTER nine times The Backlight setting flashes 2 Turn the Rotary Channel Selector at the base or press on the Remote SPK MIC to change the setting between OFF 1 LO 2 MID and 3 HI when standar...

Page 31: ...This allows for additional channels to be added up to 80 Channels This simply means that the new narrowband radio you have purchased will have more channels than older radios Please refer to the guidelines above and the channel chart for further channel information A list of currently authorised channels can also be obtained from the ACMA website in Australia and the MED website in New Zealand Int...

Page 32: ... RX only 3 476 475 477 225 CH33 23 476 975 RX only 4 476 500 477 250 CH34 24 477 000 5 476 525 477 275 CH35 25 477 025 6 476 550 477 300 CH36 26 477 050 7 476 575 477 325 CH37 27 477 075 8 476 600 477 350 CH38 28 477 100 9 476 625 29 477 125 10 476 650 30 477 150 11 476 675 31 477 175 12 476 700 32 477 200 13 476 725 33 477 225 14 476 750 34 477 250 15 476 775 35 477 275 16 476 800 36 477 300 17 4...

Page 33: ...477 0125 45 476 5375 477 2875 CH 75 65 477 0375 46 476 5625 477 3125 CH 76 66 477 0625 47 476 5875 477 3375 CH 77 67 477 0875 48 476 6125 477 3625 CH 78 68 477 1125 49 476 6375 69 477 1375 50 476 6625 70 477 1625 51 476 6875 71 477 1875 52 476 7125 72 477 2125 53 476 7375 73 477 2375 54 476 7625 74 477 2625 55 476 7875 75 477 2875 56 476 8125 76 477 3125 57 476 8375 77 477 3375 58 476 8625 78 477 ...

Page 34: ...F 20 131 8 1 67 0 21 136 5 2 71 9 22 141 3 3 74 4 23 146 2 4 77 0 24 151 4 5 79 7 25 156 7 6 82 5 26 162 2 7 85 4 27 167 9 8 88 5 28 173 8 9 91 5 29 179 9 10 94 8 30 186 2 11 97 4 31 192 8 12 100 0 32 203 5 13 103 5 33 210 7 14 107 2 34 218 1 15 110 9 35 225 7 16 114 8 36 223 6 17 118 8 37 241 8 18 123 0 38 250 3 19 127 3 ...

Page 35: ...0 503 11 054 46 261 81 506 12 065 47 263 82 516 13 071 48 265 83 523 14 072 49 266 84 526 15 073 50 271 85 532 16 074 51 274 86 546 17 114 52 306 87 565 18 115 53 311 88 606 19 116 54 315 89 612 20 122 55 325 90 624 21 125 56 331 91 627 22 131 57 332 92 631 23 132 58 343 93 632 24 134 59 346 94 654 25 143 60 351 95 662 26 145 61 356 96 664 27 152 62 364 97 703 28 155 63 365 98 712 29 156 64 371 99...

Page 36: ...Notes 36 UNIDEN UH7740NB UH7750NB UHF CB Transceiver ...

Page 37: ...Notes 37 UNIDEN UH7740NB UH7750NB UHF CB Transceiver ...

Page 38: ... 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 Aust or Uniden NZ C Improperly installed contrary to instructions contained in the relevant Owner s Manual D Repaired by someone ...

Page 39: ...anty service Depending on the country in which the Product was first purchased if you believe that your Product does not conform with this warranty you should deliver the Product together with satisfactory evidence of your original purchase such as a legible copy of the sales docket to Uniden at the addresses shown below You should contact Uniden regarding any compensation that may be payable for ...

Page 40: ... 2011 Uniden Australia Pty Limited Uniden New Zealand Ltd Printed in PRC U01UT947ZZB 0 ...

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