Garmin VHF 725e User's Manual
Contents
1. INTRODUCTION Compliance Statements CE COMPLIANCE STATEMENT This device complies with the essential requirements of CE for meeting standards EN301 178 and EN 300 828 WARNING This transmitter will operate on frequencies channels that have restricted use Use of International U S and Canadian Bands presents frequencies that have restricted use Operation on these frequencies without proper authorization is strictly prohibited In the United States Band for example the channel assignments include frequencies assigned for exclusive use of the U S Coast Guard For frequencies channels that are currently for use in the U S without an individual license please contact the FCC Call Center at 1 888 CALL FCC INTRODUCTION Warnings and Precautions RADIO LICENSES The VHF 725e user accepts all responsibility for obtaining the proper licensing before using the transmitter In many instances you must have a current radio station license before using this transceiver It my be unlawful to operate a ship station which is not licensed Inquire through your dealer or the appropriate government agency for a Ship Radiophone license application A government issued radio station license is issued with the call sign which is your crafts identification for radio communication purposes OPERATOR S LICENSE A Restricted Radiotelephone Operator Permit is the license most often acquired by radi2. AA Alkaline Cells 0 000 0ccceseseeseeeees Hendiehder etal Maia EE ARES Part Number 010 10189 00 Wrist Strap Part Number 013 00027 00 Belt Clip Part Number 145 00327 00 Belt Clip Mounting Screws Part Number 211 54307 11 Cigarette Lighter Charging Cable Kit Assy s A E ete cemeasesteeachececeeaesn st Part Number 010 10190 00 Owners Manual Part Number 190 00163 00 Contact GARMIN Customer Service to obtain replacement parts Refer to Page 15 for Antenna and Battery Installation Cigarette Lighter Charging Cable Assembly Alkaline Battery Tray Charges the battery pack using a 12 volt DC power source Provides an alternate source of power Installing the Belt Clip and Wrist Strap Bada ack oj VHF 725 The VHF 725e is supplied with a belt Mounting clip and carrying strap so you can carry ist Screws the unit wherever you go Attach the clip Strap to the back of the unit using the two mounting screws provided To attach the af i wrist strap thread the cord portion of the strap through the slot in the clip then a a insert the solid end of the strap through marea the loop formed by the cord pulling it Belt Clip through until snug Figure 13 FIGURE 13 APPENDIX A Optional Accessories Optional Accessories Nickel Metal Hydride Rechargeable Battery Pack 0 more capacity than the NiCad PACh scsiscutessdstoucessiegss tebesisesastes Part Num
3. VHF 725e submersible marine radio owner s manual and reference guide 1999 GARMIN Corporation GARMIN International Inc 1200 E 151 Street Olathe Kansas 66062 U S A Tel 913 397 8200 or 800 800 1020 Fax 913 397 8282 GARMIN Europe Ltd Unit 5 The Quadrangle Abbey Park Industrial Estate Romsey SO51 9AQ U K Tel 011 44 1794 519944 Fax 011 44 1794 519222 GARMIN Asia Corp 3rd Floor No 1 Lane 45 Pao Hsing Road Hsin Tien Taipei Taiwan R O C Tel 011 886 02 2917 4107 Fax 011 886 02 2917 1758 All rights reserved Except as expressly provided herein no part of this manual may be reproduced copied transmitted disseminated downloaded or stored in any storage medium for any purpose without prior written consent of GARMIN Corporation GARMIN Corporation hereby grants permission to download a single copy of this manual onto a hard drive or other electronic storage medium to be viewed for personal use provided that such electronic or printed copy of this manual contains the complete text of this copyright notice and provided further that any unauthorized commercial distribution of this manual is strictly prohibited Information in this manual is subject to change without notice GARMIN Coroporation reserves the right to change or improve its products and to make changes in the content without obligation to notify any person or organization of such changes Visit the GARMIN website for curre
4. You may want to keep in contact with several vessels in your immediate area at the same time For this purpose the scan feature is available You can program up to ten channels from any combination of USA International or Canadian bands into memory Whenever a transmission is received the scan will stop at that channel until the transmission ends and then move on until it recognizes another transmission You cannot scan weather channels since they broadcast continually and do not allow a break in transmission for the scan to move to the next channel You can utilize the WX Alert feature to monitor for severe weather conditions To scan channels 1 Before activating the scan feature you must program at least two channels into memory You can do this by pressing the UIIIC key to select the desired channel band and then use the UP DOWN arrow keys to select channels in that band Press the MEM key to place the displayed channel in the scan memory Figure 7 2 Repeat this process for the desired channels 3 Press the SCAN key to begin the scanning process Pressing the SCAN key again will stop the scanning process NOTE If the PTT key is pressed during scanning when STARTED the display is changing it will cancel SCAN and stop at the channel last scanned If a channel is static being received you must transmit within 5 seconds after the received broadcast ends before SCAN moves to the next channel After transmitting scan
5. From the Call CPEM Channel To Regular Channels Activate TRI Tri Watch C16 Feature FIGURE 11 22 D iN oo K Press the SCAN key to monitor the selected channels Figure 10 Press the 16 key once if you want to monitor the emergency channel 16 Figure 11 Press the CALL key if you want to monitor the programmed Call channel Press and hold the 16 key if you want to activate the TRI WATCH feature in order to monitor the emergency channel the Call channel and one regular channel simultaneously To transmit on the VHF 725e 1 N oo Perform Steps 1 through 4 of the procedure for receiving above Choose a correct channel for communications Channels are restricted to use by various government agencies types of vessels and maritime service operators Review the list in Appendix C to determine which channels are available for your use Wait until the channel you have selected is free of communications THIS IS AREGULATORY AGENCY REQUIREMENT NOTE For communications over short distances press the H L key until LOW is displayed on the LCD This reduces transmission power to one watt prolonging battery life GETTING STARTED 4 Press and hold the PTT Press To Talk key and begin your transmission The TX symbol will appear on the LCD display Figure 12 ou Speak directly into the microphone on the front of the unit see page 2 and hold the unit verticall
6. Error TONES inisee anns 33 F Flexible Antenna 2 K Keys and Displays 4 9 Key LoGk iiisvisds eaeisvecaetee ree 24 M Maritime Radio Users Hndbk iii Marine Radio License iv MeOMOIYVi ciinii 5 7 18 APPENDIX G MeSSage cccseceeeseseteeeeeeeteeeeees 33 MOMICOTING ics tociscseneiaats 18 20 N NiCad Battery Kit 26 P Packing List eects ii Priority Scan R Regulatory Agencies iii iv S Scanning Set P eren 18 Selecting Channel 16 19 22 Selecting a Channel 16 Specifications 27 T Termin Clog inni 34 Transmitting neee peneana 22 Tri Wate hirisein irn un 19 Trickle Charger 26 Troubleshooting 32 Vv VHF Communication 10 VHF Linef Sight resines 23 Volume Adjustment 0 0054 18 WwW Warrant Yosemite 36 Warranty Service 31 36 Wrist Strap 25 APPENDIX H Warranty LIMITED WARRANTY GARMIN Corporation warrants this product to be free from defects in materials and manufacture for three years from the date of purchase GARMIN will at its sole option repair or replace any components that fail in normal use Such repairs or replacement will be made at no charge to the customer for parts or labor The customer is however responsible for any transportation costs This warranty does not cover failures due to abuse misuse accident or unauthorized alteration or repairs THE WARRANTIES AND REM
7. Industrial Estate Romsey SO51 9AQ U K GARMIN Asia Corp 3rd Floor No 1 Lane 45 Pao Hsing Road Hsin Tien Taipei Taiwan R O C www garmin com Part Number 190 00163 00 Rev A
8. Press and a Hold for More Than 1 Second FIGURE 13 24 Backlighting the LCD Display and Keypad The backlighting feature is used to improve readability of the LCD display and keypad in dim light 1 Press and release the PWR key after the unit has powered on The display and keypad will be illuminated for 5 seconds after the last key press before cycling off NOTE Press this key anytime you require visual reference in dim light Using the Key Lock Feature If you desire to maintain a selected function on your VHF 725e such as TRI WATCH or SCAN you can lock the keys using the Lock feature to prevent inadvertent canceling or changing of unit settings How ever the Press To Talk Squelch and Power keys still function 1 Press the H IL LOCK Hi Low transmission power key for more than one second after you have set the unit to the function desired When the unit keypad is locked the LOCK message will be displayed on the LCD screen Figure 13 2 To cancel the lock feature press the HIL LOCK key again for more than one second or turn Off the unit using the POWER key APPENDIX A Accessories amp Installation Standard Accessories amp Replacement Components Included with the VHF 725e Antena rnaen ee Part Number 700 00010 00 NiCad Battery Pack Kit Includes Battery Pack and Charger amp Charging Stand PIERE O PEE TEETE E Part Number 010 10188 01 Alkaline Battery Tray Requires Six
9. VHF you have made application and received a designated frequency from the appropriate licensing agency Channel List Programmable frequencies available are from 154 500 MHz to 163 500 MHz in 25 kHz increments Channel Number Frequency MHz Type of Traffic Function USAJCAN INT TX RX Ship to Ship Ship to Shore 65 156 275 160 875 Port Ops No Yes 65A 65A 156 275 156 325 Port Ops No Yes 66 156 325 160 925 Port Ops Yes Yes 66A 156 325 156 325 Port Ops 1 watt Only Yes 66A 156 325 156 325 Port Ops Yes Yes 67 67 67 156 375156 373 Com Yes No 68 68 68 156 425 156 425 Non Com Yes Yes 69 69 69 156 475 156 475 Non Com Yes Yes 70 70 70 NO TX 156 525 Digital Selective Calling Yes No 71 71 71 156 575 156 575 Non Com Yes Yes T2 72 72 1156 625 156 625 Non Com Yes No 73 73 73 156 675 156 675 Port Ops Yes Yes 74 74 74 156 725 156 725 Port Ops Yes Yes 77 77 156 875 156 875 Port Ops 1 watt int Yes 77 156 875 156 875 Port Ops Yes Yes 78 156 925 161 525 Non Com Yes Yes 78A 78A 156 925 156 925 Non Com l Yes Yes 79 156 975 161 575 Com Yes Yes 79A 79A 156 975 156 975 Com Yes Yes 80 157 025 161 625 Com Yes Yes 80A 80A 157 025 157 025 Com l Yes Yes 81 157 075 161 675 U S Govt Only Yes Yes 81A 81A 157 075 157 075 U S Govt Only Yes Yes 82 157 125 161 725 U S Govt Only Yes Yes 82A 82A 137 125 157 125 U S Govt Only Yes Yes 83 83 157 175 161 775 U S Govt Only Yes Yes 83A 83
10. When you power up the unit a channel will automatically be selected but it may not be suitable for making unit settings To select a channel 1 Use the U IIC Channel Band key to select USA International or Canadian channel bands Figure 4 The unit was set at the factory to channel 10 before shipment 2 Press the UP or DOWN arrow key to scroll through the channels available on the selected band Figure 4 If you don t know which channel to select refer to the Channel List in Appendix C i on pages 28 and 29 NOTE You will notice an A indicator adjacent to some channel numbers in the USA and Canadian bands These are simplex channels transmitting and receiving on the same frequency while the International counterpart is a duplex channel transmitting on one frequency while receiving on another Setting the Squelch Threshold Setting the Squelch is important for recep tion of signals you want to hear There are ten threshold levels from 0 which allows all signals to be received to 9 which allows only the strongest signal to be heard through the speaker The diagram in Figure 5 demonstrates how setting the threshold level allows you to hear only the signals you desire while weaker unintelligible signals are not heard To set the Squelch threshold 1 Adjust the Squelch to the lowest setting by pressing and holding the Squelch SQ key then pressing the DOWN arrow key repeatedly until the display indica
11. electret Compliance EN 301 178 Power Operating Voltage 7 5 VDC Source Standard NiCad rechargeable battery pack Optional 6 AA alkaline battery cells Battery Life 10 hours with NiCad battery pack 6 hours with 6 AA alkaline cells 13 hours with NiMH battery pack Current Consumption Receiver lt 50mA Transmit High Power lt 1 6A Low Power lt 0 8A Tested using 5 TX High 5 RX 90 Standby Duty Cycle 27 APPENDIX C VHF Channel List Channel Number Frequency MHz Type of Traffic Function USA CAN INT TX RX Ship to Ship Ship to Shore 0l 01 156 050 160 650 Com l Port Ops VTS Yes Yes O1A 56 050 156 050 Com Port Ops VTS Yes Yes 02 02 156 100 160 700 Port Ops Yes Yes 03 03 156 150 160 750 Com l Port Ops VTS Yes Yes 03A 156 150 156 150 Com l Port Ops VTS Yes Yes 04 156 200 160 800 Port Ops Yes Yes 04A 156 200 156 200 Port Ops Yes Yes 05 156 250 160 850 Port Ops VTS Yes Yes 05A 05A 156 250 156 250 Port Ops VTS Yes Yes 06 06 06 156 300 1156 300 Safety Yes No 07 156 350 1160 950 Coml Yes Yes O7A O07A 156 350 156 350 Com Yes Yes 08 08 08 156 400 156 400 Com Yes No 09 109 09 156 450 156 450 Com l amp Non Com l Yes Yes 10 10 10 156 500 156 500 Com Yes Yes ll jill 11 156 550 156 550 Com VTS SMS Yes Yes 12 12 12 156 600 156 600 Port Ops VTS SMS Yes Yes 13 156 650 156 650 Navigational l watt int No 13 13 15
12. 6 650 156 650 Navigational Yes No 14 14 14 156 700 156 700 Port Ops Yes Yes 15 NO TX 156 750 Environmental RX Only 15 15 156 750 156 750 Environmental 1 watt Only 16 16 16 156 800 1156 800 Distress Safety Calling Yes Yes 17 17 17 156 850 156 850 State Control 1 watt Only Yes 18 156 900 1161 500 Com l Yes Yes 18A 18A 56 900 156 900 Com Yes Yes 19 156 950 1161 550 Com l Yes Yes 19A 19A 56 950 156 950 Com Yes Yes 20 20 157 000 161 600 Port Ops Yes Yes 20 157 200 161 650 Port Ops 1 watt Only Yes 21 157 050 161 650 U S Govt Only Yes Yes 21A 21A 57 050 157 050 U S Govt Only Yes Yes 22 157 100 161 700 Coast Guard Yes Yes 22A 22A 157 100 1157 100 Coast Guard Yes Yes 23 23 157 150 161 750 U S Govt Only Yes Yes 23A 157 150 157 150 U S Govt Only Yes Yes 24 24 24 157 200 161 800 Public Corresp No Yes 25 25 25 157 2501161 850 Public Corresp No Yes 26 26 26 157 3001161 900 Public Corresp No Yes 27 27 27 157 3501161 950 Public Corresp No Yes 28 28 28 157 400 162 000 Public Corresp No Yes 60 60 156 025 160 625 61 156 075 1160 675 61A 61A 156 075 156 075 62 156 125 160 725 62A 156 125 156 125 63 156 175 L60 775 63A 156 175 156 175 64 64 1156 225 160 825 64A 64A 156 225 156 225 28 APPENDIX C Note Private channels can be programmed by your radio dealer after
13. A 157 175 157 175 U S Govt Only Yes Yes 84 84 84 157 225 161 825 Public Corresp No Yes 85 85 85 157 275 161 875 Public Corresp No Yes 86 86 86 157 325 161 925 Public Corresp No Yes 87 87 87 157 375 161 975 Public Corresp No Yes 88 88 88 157 425 162 025 Public Corresp No Yes 88A 157 425 157 425 Public Corresp No Yes Marina Channels International Band Only Must be programmed by an Authorized Dealer FI 155 975 155 975 Denmark Finland Netherlands Yes Yes F2 155 925 155 925 Denmark Finland Netherlands Yes Yes F3 155 175 155 175 Denmark Finland Netherlands Yes Yes F4 155 150 155 150 Netherlands Yes Yes F5 155 125 155 125 Netherlands Yes Yes F6 155 100 155 100 Netherlands Yes Yes F7 157375157375 Netherlands Yes Yes L1 155 500 155 500 Denmark Finland Sweden Yes Yes L2 155 525 155 525 Denmark Finland Sweden Yes Yes L3 155 550 155 550 Finland Yes Yes M1 157 850 157 850 United Kingdom Yes Yes M2 161 425 161 425 United Kingdom Yes Yes Pl 155 625 155 625 Sweden Yes Yes P2 155 775 155 775 Sweden Yes Yes P3 155 825 155 825 Sweden Yes Yes 29 APPENDIX D 30 Maintenance amp Troubleshooting Storage Store the VHF 725e in a cool dry location when not used for prolonged periods When stored for more than six months remove alkaline batteries to prevent leakage from expended cells While the GARMIN VHF 725e is designed to withstand im
14. Distress Channel it is used to contact nearby vessels and in emergencies where there is threat to life or property A calling or hailing channel is used for establishing contact with another vessel as an alternate to channel 16 As channel 16 is often used so frequently that hailing vessels is not practical in some high traffic areas Contact is made using a programmed Call channel Maritime radio users are required to monitor channel 16 it is also advisable to monitor the Call channel and a selected regular channel as well To facilitate these requirements the VHF 725e is equipped with a Tri Watch feature that allows you to engage in regular channel communications and monitor both the emergency channel and the Call channel Appendix C on pages 28 through 30 of this manual provides a listing of channels and the use of each including those which are for receiving broadcast messages only 11 GETTING STARTED Maritime Radio Services Operation 12 Here is a grouping of the channels and a brief description of their use Channels 5 12 14 20 65 66 73 74 77 Port Operations Can be used by any vessel for communications between ships and ship to coast stations for messages relating to operational handling movement and safety of vessels in or near ports locks or waterways Channel 77 is limited to communications to and from commercial pilots in regard to movement and docking of vessels Channels 11 12 13 and 14 are used
15. EDIES CONTAINED HEREIN ARE EXCLU SIVE AND IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED OR STATUTORY INCLUDING ANY LIABILITY ARISING UNDER ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE STATUTORY OR OTHERWISE THIS WAR RANTY GIVES YOU SPECIFIC LEGAL RIGHTS WHICH MAY VARY FROM STATE TO STATE IN NO EVENT SHALL GARMIN BE LIABLE FOR ANY INCIDENTAL SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES WHETHER RESULTING FROM THE USE MISUSE OR INABILITY TO USE THIS PRODUCT OR FROM DEFECTS IN THE PRODUCT SOME STATES DO NOT ALLOW THE EXCLUSION OF INCIDENTAL OR CONSEQUEN TIAL DAMAGES SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU To obtain warranty service call the GARMIN Customer Service depart ment 913 397 8200 for a returned merchandise tracking number The unit should be securely packaged with the tracking number clearly marked on the outside of the package and sent freight prepaid and insured to a GARMIN warranty service station A copy of the original sales receipt is required as the proof of purchase for warranty repairs GARMIN retains the exclusive right to repair or replace the unit or software or offer a full refund of the purchase price at its sole discre tion SUCH REMEDY SHALL BE YOUR SOLE AND EXCLUSIVE REM EDY FOR ANY BREACH OF WARRANTY 36 1999 GARMIN Corporation GARMIN International Inc 1200 E 151 Street Olathe KS 66062 U S A GARMIN Europe LTD Unit 5 The Quadrangle Abbey Park
16. IXE Messages Messages The VHF 725e responds to operating conditions in two ways LCD Display screen messages and audio tones These messages provide notification of errors in operation or the status of VHF 725e features Audio Messages Confirmation Tones These tones consisting of a single Beep are audible whenever you press a key on the unit and confirm that unit is responding to your action Error Tones These tones consisting of two beeps and in some instances a continuous string of beeps and indicate that you have pressed a key that cannot perform a function under the cur rent unit operating mode Screen Messages LOW BATT This display appears when the battery capacity has dropped to 10 of its capacity The LOW BATT display flashes and an initial three beep tone will be heard The unit will operate under normal use for approximately 30 more minutes TX and RX If these two icons flash together or the TX only flashes whenever the PTT key is pressed the unit must be serviced Contact the GARMIN Product Support Department at 1 800 800 1020 or 913 397 8200 for information 33 APPENDIX F 34 Glossary Glossary of Radio Terminology and Abbreviations Canadian Channels Channel designations as defined and regulated by Industry Canada RIC Marine Communications amp Traffic Services Duplex Transmit and receive on different frequencies FM Frequency Modulati
17. allow only receive operation Scan Indicator This display provides indica tion that the Scan feature is active Receive RX Indicator This indicator provides notice that a signal is being received by the unit Transmit TX Indicator This indicator appears when you are using the VHF 725e to transmit and will come on when you hold down the PTT key GETTING STARTED Keys amp Function VOL Pritt Hi Low Power Indicator LOW SCAN gt l1 1 CAN j i I VOL D N Scan Indicator Low IZ E LL Pri Receive Indicator Low ifr sit VOL Transmit Indicator GETTING STARTED Maritime Radio Services Operation 10 Important Information for First Time Users About Operating a Marine Radio If you are a first time user of a marine radio you should be aware of methods for operating your GARMIN VHF 725e International VHF Radio communication is governed by the International Telecommunications Union ITU Rules and Regulations for use of International Band channels vary throughout the countries under ITU jurisdiction It is therefore recommended that you obtain information about VHF radio use for the specific areas of planned use If you plan to use the USA Channel Band we recommend that you obtain a copy of the Maritime Radio Users Handbook an authoritative handbook prepared by the Radio Technical Commis sion for Maritime Servic
18. ber 010 10245 00 Spare NiCad Battery Pack Part Number 010 10189 00 VHF 725e Soft Carry Holster Part Number 010 10219 00 Contact your GARMIN Dealer to obtain these optional accessories VHF 725e Optional Accessories Nickel Metal Hydride Battery Soft Carry Holster Pack Rugged nylon holster with integral Provides 50 more battery capacity belt loop Recharges using the charging stand and charging unit provided wth the VHF 725e Spare NiCad Battery Pack Allows for uninterrupted use of the VHF 725e Use while charging the original battery pack 26 APPENDIX B Specifications Physical Size 5 5 H x 2 0 W x 1 3 D 14 0 x 5 0 x3 3cm Weight Approximately 12 1 oz 35Kg Temperature Range 4 to 158 degrees F 20 to 70 degrees C Transceiver Frequency Bands All U S Canadian and International marine channels Channel Spacing 25kHz Receiver Selectivity Adjacent channel selectivity 70dB Intermodulation rejection 68dB Spurious Image Response 70dB Sensitivity FM gt 12dB SINAD at 0 3 microvolt WX gt 12dB SINAD at 0 3 microvolt Squelch Sensitivity 123dBm to 107dBm Threshold Audio Power 0 5 W into 16 ohm speaker Audio Distortion lt 10 Hum and Noise lt 40dB Transmitter Transmitter Output 5 watts high 1 watt low Frequency Stability 10 PPM Hum and Noise lt 40dB Spurious Emissions lt 70dB Duty Cycle No damage even if continuously keyed Microphone Internal
19. d Battery Pack Fully charge the battery pack before its first use The battery pack requires 12 hours for a full charge and should not be charged in excess of this time period Charge only with the VHF 725e Charging Unit provided with the NiCad Battery Pack Partially discharging a nickel cadmium battery and then recharging it causes a phenomenon referred to as memory reset When a battery that is not fully discharged is then recharged it resets the memory in proportion to the amount of previous discharge resulting in a gradually decreasing recharge capacity To ensure that this type of battery pack retains its full capacity it should be almost fully discharged when the battery symbol blinks and then recharged completely after every few cycles of use Municipal Law requires for environmentally sound Oy collection and recycling or disposal of nickel cadmium batteries Contact your local waste management official for instructions on disposal Prequently fully discharging a NiCad battery may cause damage to the battery cells Service and Repairs The GARMIN VHF 725e is warranted for three years under the terms of the GARMIN Limited Warranty on Page 36 of this manual If you need to obtain warranty service for your unit call the GARMIN Product Support Department 913 397 8200 for a returned merchan dise tracking number The unit should be securely packaged with the tracking number clearly marked on the outside of the packag
20. e and sent freight prepaid and insured to GARMIN warranty service station A copy of the original sales receipt is required as proof of purchase for warranty repairs GARMIN reserves the exclusive right to repair or replace the unit or software at its sole discretion If your unit is no longer under warranty GARMIN will make repairs at the GARMIN current labor rate and parts costs Units repaired in this manner are warranted for 90 days from the date of return to the owner 31 APPENDIX D Maintenance amp Troubleshooting Troubleshooting Guide SYMPTOM PROBABLE CAUSE 32 Unit does not come ON No sound from speaker Cannot transmit or transmission isn t being received The displayed channel cannot be changed Error tone 2 beeps is heard when a key is pressed and no unit function is performed Squelch threshold level too high No channel broadcast is being received Volume is set too low Some channels are for receive only Batteries are exhausted Some channels are for low power only Output power too low The LOCK function is on Incorrect key selection and the programming is limiting key function REMEDY Replace batteries Set to a lower threshold point Move to another channel Increase volume Change channel Replace batteries Change channels Press H L key for high power Press an hold the H L key for at least one second Select correct key APPEND
21. eature is active GETTING STARTED Low USA E ll I VOL PIT iii iP Channel Number Indicato LOW SCAN a we ID os o gt A VOL PTTTI LLL Channel Band Indicator Low ee LI j t CALL VOL nD assent Call Channel Indicator LOW SCAN fit ca p i VOL Prt titi Memory Channel Indicator Low INT Ol I TRI T e CAL rj 16 VOL m all Tri Watch Indicator Keys amp Function Displays VOL D ee Lock Indicator BY tow USA r CTi A E PECEL Battery Level Indicator Low Battery Indicator ov USA o Wat VOL mm on Volume Indicator 8 Lock Indicator This indicator is displayed when the Lock feature is active Battery Level Indicator This battery shaped icon displays information about battery capacity in 25 increments This indicator is always active Squelch Indicator This display appears whenever the SQ squelch key is presses for either squelch override or setting of the squelch threshold Low Battery Indicator This indicator flashes on and off when the battery capacity drops to 10 or below Volume Level Indicator This band of gradually rising bars provides an indication of the volume setting This indicator is always active Hi Low Power Indicators These displays indicate the transmitter power level NOTE Some channels only permit transmission on Low while others
22. eives signals best when held upright and is less effective when positioned horizontally To install the antenna 1 Carefully align the bottom of the antenna with the threaded connector on the top of the VHF 725e and screw it on until snug against the seating surface Figure 1 Installing the Batteries The VHF 725e uses a rechargeable NiCad Battery Pack to provide approximately 10 hours of operating time under normal use Alkaline AA batteries installed in the optional GARMIN Battery tray may also be used The battery level indicator at the lower left corner of the unit LCD display gives indication of battery capacity in increments of 25 The Battery Pack is provided with a Charging Stand and Charging Unit To assemble the Charging Unit 1 Insert the Charging Unit cord plug with the contact pins into the base of the Charging Stand Position the flange on the plug over the slots in the bottom of the stand base and then press down until it clicks into place Pull the cord away from the stand slightly to allow the plug to move down freely Figure 2 NOTE If using the 12 VDC Cigarette Lighter Charging Cable install the cord plug in the charging stand in the same manner N Connect the Charging Unit to a 240 VAC Power Outlet oo The NiCad Battery Pack should be installed in the VHF 752e when you remove it from the shipping carton Place the unit base down into the Charging Stand and allow 12 hours for chargin
23. es Post Office Box 19087 Washington D C 20036 Although a Federal Communication Commission FCC license is no longer required for individual operator use you must comply with all applicable FCC rules and regulations Marine radio communication within Canadian boundaries is governed by Industry Canada RIC Marine Communications Traffic Services If you plan to use the 725e in this jurisdiction it recommended that you obtain information concerning radio operation rules and regulations For safety and efficient navigation of vessels the maritime radio frequency bands are separated into four groups Specific frequencies within each are assigned for particular safety and functional GETTING STARTED Maritime Radio Services Operation applications such as ship to shore communications and navigation in waterways and ports You may not have access to some which are not for public use frequencies and you are required to monitor and use others which are safety and navigational procedure frequencies The four groups you will have occasion to use are the U S A Regular Band of 52 channels the Canadian Band of 56 channels the International Band of 55 channels and 15 programmed in Marina Channels and 57 programmed in Private channels on the International Band Some of these are receive listen only The emergency channel 16 is restricted to hailing of other vessels distress calls and safety purposes only Known as the Hail and
24. esesinsuieenes sedesianenteens 35 Appendix H Warranty and Service Information 36 GETTING STARTED Unit Description Flexible Antenna Squelch Key LCD Display Screen Press To Talk PTT Key Scan Key Memory Key Hi Low Power Lock Key Channel Band Selection Key Tri Watch Channel 16 Key Power Backlighting Key Volume Control Keys Call Programming Call Key UP DOWN Arrow Channel Selection Keys Battery Pack Microphone Speaker GETTING STARTED Unit Description The VHF 725e is a 5 watt marine VHF communications transceiver in a convenient handheld package A keypad located on the front of the unit provides one hand control of communication features The knobless design allows push button Squelch and Volume adjust ment A single button press provides a manual Squelch Override function Tri Watch monitoring mode allows simultaneous monitoring of emergency channel 16 Call channel and a working channel programmed by the user The channel 16 key allows you to toggle between emer gency and working channels A 1 high by 1 3 8 wide LCD display provides indication of all features and functions of the VHF 725e The scan feature allows the operator to select up to 10 channels for continuous monitoring in any combination of U S A Canadian and International bands Call Channel programming allows you to select and program a channel f
25. ets the squelch Channel Down Keys threshold level Call Channel Programming Call Key Pressing this key for longer than 1 second after C PGM selecting a channel from one of the channel bands Call Channel will store that channel as the calling channel to Programming be accessed whenever the Call key is pressed You Call Key can program a Call channel for each of the three bands USA Canadian International NOTE Selection of appropriate call channels is based on a working knowledge of available gt channels and their designated uses Volume Increase and Volume Decrease Keys Pressing the plus and minus keys increases or decreases the volume of received transmissions J and audio tones Volume Increase amp Volume Decrease Keys Memory Key Pressing this key after selecting a channel places that channel into the scanning memory Pressing this key when a channel is stored in memory as indicated by the MEM icon on the display will remove the channel from memory A maximum of ten channels can be stored in memoty Scan Key Pressing this key starts the scanning of channels entered into memory Pressing this key while scanning disables the scan feature while retaining the selected channels in memory U V C USA International Canadian Frequency Bands Key This key allows the operator to select from the three channel bands Pressing and releasing the key sequences through the three bands The band selected is displa
26. for traffic service on the Great Lakes St Lawrence Seaway and designated major ports Channel 6 Intership Safety For use by any vessel for communi cating navigational and weather warnings to other ships Also used for communicating during search and rescue operations Ship to ship communications only Do not use for routine communications as this is a safety channel Channels 7 8 9 10 11 18 19 67 79 80 88 Commercial Vessels Used for communication between vessels pertaining to the purpose for which the vessel is used Limited communications between vessels and coast stations Recreational boats are not permitted to use these channels Channels 8 67 and 88 may not be used for ship to coast communications Channel 88 is not available on the Great Lakes and St Lawrence Seaway Channels 9 68 69 71 72 78 non Commercial Boat Opera tions Used by recreational boaters and others not engaged in commercial transport Provides a communication channel pertain ing to the needs of the vessel maneuvers berthing provisioning fueling etc Used as a second receiver between ship to ship and ship to limited coast stations Channel 72 may not be used for ship to coast communications GETTING STARTED Maritime Radio Services Operation Channel 13 Navigation used by any vessel for safety communica tions regarding the maneuvering of vessels or directing of a vessels movements Ship to ship and secondarily ship
27. g to full capacity GETTING STARTED Antenna amp Battery Installation Antenna E FIGURE 1 Charging a Unit Charging ia d Detail of Charging Stand Base FIGURE 2 GETTING STARTED Selecting A Channel VHF 725e Unit Battery Pack D Ring with Slot FIGURE 3 Low o a A E VOL m saanti Selected Channel Band Select Channel Select oe FIGURE 4 4 If you have an additional NiCad Battery Pack to use as a spare you may insert it directly into the charging stand for recharging 5 To remove a depleted Battery Pack and install a spare lift up on the D ring on the base of the Battery Pack and use it or a coin inserted in the screw slot to turn the screw and remove the battery pack from the unit Figure 3 fox After installing the spare Battery Pack press the POWER key to be certain the battery has been properly charged and the unit is functioning Check the Battery Level indicator on the LCD display to be certain of a full charge NOTE If using two battery packs with one as a spare it is recommended to cycle both packs through the unit as NiCad batteries will self discharge when stored for long periods of time This practice will ensure a fully charged spare battery at all times Selecting a Channel To begin using the VHF 725e you will want to select a channel to monitor while you personalize the unit settings such as volume and squelch
28. h level eliminates weak unwanted signals as explained on page 17 H L High Low Power Key This key toggles the transmitter power level from High 5 watts to Low 1 watt when pressed and released It also locks the keypad when pressed and held for more than one second The Power key PTT key backlighting key and the Squelch key still function in the Lock mode Locking the keypad prevents inadvertent changing of channel settings and feature modes The VHF 725e LCD Display Screen gives indication of channels being monitored battery power level volume level and the status of all unit features Channel Number Indicator This large numeral display indicates the selected operating channel or the squelch threshold setting when the squelch key is pressed This indicator is always active Channel Band Indicator This display provides indication of the regular channel band selected U S A International or Canadian Call Channel Indicator This display provides indication that a call channel is currently being received or transmitted on Memory Channel Indicator This display in conjunction with the Channel Number Indica tor indicates that the channel number displayed has been entered into the unit memory for selection when the scan feature is active Tri Watch Indicator This display appears along with the Emergency 16 and Call Channel indicators to give notification that the Tri Watch three channel monitoring f
29. mersion in water with or without the battery pack in place it should be treated like all quality electronic equipment Wipe away any water accumula tion from the surface of the unit and use a paper towel or other absorbent material to wick out any moisture from the battery cavity Exposure of battery terminals to salt spray may cause corrosion and loss of conductivity Be certain to keep contacts dry and away from corrosive elements Storage temperature should not vary from below 4 degrees F 20 degrees C and above 158 degrees F 70 C Cleaning Clean exterior portions of the VHF 725e with a mild soap and water solution Do not use harsh detergents or solvent based cleaning agents Isopropyl alcohol is acceptable Wipe dry with a clean non abrasive cloth Battery Maintenance Keep battery contacts clean Use only the NiCad Battery Pack or types of batteries specified for use with VHF 725e The VHF 725e accepts six 6 standard AA alkaline rechargeable alkaline or rechargeable NiCad cells when the optional battery tray is used It is advisable to maintain a supply of replacement batteries if the VHF 725e is to be placed in service for a prolonged period where recharging of the NiCad Battery Pack is not possible and replace ment batteries cannot be easily obtained NOTE Whenever possible transmit with 1 watt power to prolong battery life APPENDIX D Maintenance amp Troubleshooting If Using The Optional NiCa
30. ning resumes when you release the key Pressing any other keys will cancel the scan with the exception of the Power Volume Volume Squelch and Hi low keys 4 To remove a channel from the scan memory simply access it with the UP DOWN arrow keys and press the MEM key NOTE Channels entered into memory will be retained when the unit batteries are removed Tri Watch Tri Watch is a method of monitoring the emergency channel 16 and the Call channel while monitoring the channel you are using for communications _ INT J i TRI To use Tri Watch I bl 6 1 First determine which channel other than 16 and EE aa hni the Call channel that you desire to monitor then use the UP or DOWN arrow keys to make a choice Ti Watch Display Press and 2 Press and hold the 16 key for more than one o Hold for second Figure 8 C16 More Than 1 Second 3 Observe the LCD display showing TRI CALL 16 and the cycling set of channel numbers indicating that the TRI WATCH feature is active S 4 Observe that when a transmission is received by the third channel reception will be briefly inter rupted to monitor channels 16 and the Call channel If reception is on the Call channel it will be interrupted to monitor channel 16 Channel 16 always has priority in TRI WATCH 5 To cancel the TRI WATCH feature press the 16 key to monitor only channel 16 or any other key to return to a selected channel i GETTING STARTED Prog
31. nt updates and supplemental information concerning the use and operation of this and other GARMIN products Website address www garmin com GARMIN is a registered trademark and VHF 725e is a trademark of GARMIN Corporation Such trademarks may not be used without the express permission of GARMIN November 1999 Part Number 190 00163 00 Rev A Printed in Taiwan INTRODUCTION About This Manual Thank you for choosing the GARMIN VHF 725e To get the most from your new VHF marine radio take time to read through this owners manual in order to understand all of the operating features This manual is organized into three sections for your convenience The Introduction to the VHF 725e Features section gives you an overview of the units functional features The Getting Started section gets you started on using the VHF 725e for basic radio uses The Appendix section contains reference information on items such as accessories a channel list a troubleshooting guide and the index Before getting started check to be certain that your VHF 725e package includes the following items If you are missing anything please contact your dealer immediately Standard Package VHF 725e Unit Owners Manual Lanyard Antenna SMA Belt Clip Connector NiCad Battery Pack Charging Unit Charging Stand Mounting Alkaline Battery tray Bracket Refer to Section 3 Appendix A for a list of optional accessories available from your GARMIN Dealer
32. o operators of small watercraft when the radio is not required for safety purposes This permit must be posted aboard the craft or kept by the licensed operator Only a licensed operator may operate a marine radio transceiver Others may talk over a transceiver if the operator begins supervises and ends the transmission IMPORTANT GARMIN strongly recommends obtaining a marine radio users guide appropriate for the geographical location of intended use Read and follow instructions for proper use of your marine radio Improper usage can result in fines levied on mariners by regulatory agencies INTRODUCTION Warnings and Precautions IMPORTANT Read all instructions carefully and completely before using the VHF 725e Marine Radio This device is intended only as an aid to boating safety and navigation The performance of the VHF 725e can be affected by many factors including environ mental conditions and improper handling or use It is the users responsibility to exercise good safety and navigational judge ment and the GARMIN VHF 725e should not be relied upon in lieu of such prudence and judgement CAUTIONS For these reasons the operator should exercise the follow ing precautions to ensure proper and reliable use of the GARMIN VHF 725e DO NOT operate this transceiver within 1 meter of the ships navigational compass DO NOT recharge batteries except in methods descried in this manual DO NOT use this
33. on International Channels Channel designations as defined for use in international waters by the International Telecommunications Union ITU Marina Channels Special channels reserved for marinas located in selected European countries These channels must be programmed into the VHF International Band by an authorized dealer Private Channels Channels which are assigned by regulatory agencies governing VHF radio use for a specific region or country These channels must be programmed into the VHF International Band by an authorized dealer PTT Press To Talk switch RX Receive Simplex Transmit and receive on the same frequency Squelch To suppress background noise Tri Watch Monitors Channels 16 and the Call channel while working on yet another user designated channel TX Transmit U S A Channels Channel designations as defined by the Federal Communications Commission FCC VHF Very High Frequency 30 MHz to 300 MHz A AGCESSODIES Si 25 Antenna Installation t5 B Backlighting 000000ee 24 Battery Pack Installation 15 Belt Clipsisissdcssncavsacessmncesveretes 25 C Call Channel Programming 20 Calling Channel css cescensexess 13 Caution S is6d scanweas cxergrsdnlareds iv v Channel Definition 12 14 Channel List 28 29 CEANN G wchsssisseossdaameecddssontese 30 D Dual WatChisicsesscniderseeenemmaelsves 20 E Emergency Channel 13
34. onitoring a channel that is broadcasting you will hear that transmission It is possible to monitor any channel on any band but transmis sion on some channels is not allowed Many are receive only channels while others are simply not intended for your category of radio use To receive on the VHF 725e 1 Press and release the PWR key to turn the unit on 2 Observe that the display screen will come on and the last channel accessed will be displayed If there is someone transmitting on that channel you will hear their communication and the RX symbol will appear on the LCD display You may now select from the many receiving options NOTE For clearer reception you can adjust the volume key up or down and set the squelch threshold to a level at which the audio will be enabled oo Press the UII C key to select a channel band Figure 10 gt Press the UP DOWN arrow keys to select a channel Figure 10 oa Press the MEM key when scrolling through the channels to enter up to ten channels in the SCAN memory You must select at least two for the SCAN feature to activate Figure 10 GETTING STARTED Receiving and Transmitting ric aT voL PTT tit Receiving Mode Display Select me Channel B and EC Select A Channel D Enter Channel Into Memory FIGURE 10 21 GETTING STARTED Receiving and Transmitting Activate SCAN Feature Press to Toggle can
35. or regular conversation for instant access by pressing the Call key The high low key toggles the transmitter power level from between five watts and one watt When held for more than one second it locks and unlocks the Key Lock function to prevent inadvert ent changing of unit settings and modes The power key turns the unit off and on and when pressed briefly after the unit is powered on enables the display backlighting feature and illuminates the keys on the front of the unit Small size and light weight characterize the portability of the GARMIN VHF 725e GETTING Sas TEE Eleven keys provide access to all of the units features and functions When any key except the PTT key is pressed the unit will acknowledge by emitting a single beep confir mation tone Some keys have dual functions and those keys on the front of the unit are illuminated when the display backlighting feature is active Power Backlighting Key This key turns on Power Backlighting the unit when pressed and released and turns Key the unit off when pressed and held for more than one second Briefly pressing and releasing the power key when the unit is on will activate the backlighting feature and will last for five D seconds after the last key is pressed Channel Up and Channel Down Keys Pressing these CH arrow keys sets the operating hannel Pressing these keys while the Squelch Channel Up amp S 8 y q HE key is pressed and held s
36. our radio dealer to determine availability of programming and private channels A list of these channels is contained in the VHF Channel List on pages 30 through 32 Marina Channels These are channels located in the International Channel Band assigned to specific marinas in European countries These channels must also be programmed at your request by your radio dealer A list of Marina channels is contained in the VHF Channel List on page 29 NOTE Programming of Private Channels and Marina Channels can be done only by your VHF Radio Dealer who is authorized and has the knowledge to program the VHF 725e Your dealer is also prepared to assist you in making application for license for your use of private channels Altering your VHF 725e without proper authorization is strictly prohibited and may result in penalties and fines Some channels will appear on the display with an A suffix These are Simplex Channels receiving and transmitting on the same frequency See Selecting a Channel on page 16 for a more detailed explanation There are other regular channels in the list of channels on pages 28 and 29 that are not defined above They have special uses that do not apply generally to regular maritime traffic and communications Installing the Antenna The antenna is an essential part of your VHF 725e and the unit should never be operated without the antenna installed as this may result in damage to the unit The antenna rec
37. ramming Call Channels Channel Press and Hold for 1 Sec to C PGM Activate _ INT T LI I CALL VOL E a Call Channel Display FIGURE 9 20 NOTE If you enter channel 16 into memory for the Scan Mode it will not have the priority it receives in the Tri Watch Mode Programming Call Channels The Call channel is simply a channel that has been selected from the list of channels for each band USA Canadian International and reserved for easy access for use as a calling or hailing channel The Call channel has its own dedicated key To program Call channels 1 The default Call channel in all bands is Ch 09 Each band USA International Canadian can be programmed with a different Call channel Figure 9 2 To select a new Call channel use the UP DOWN arrow keys to select a channel from the regular channel list of the channel band you are using USA International Canadian 3 Press and hold the CALL key for more than one second to program the selected channel as the Call Channel Figure 9 NOTE Selection of appropriate call channels is based on a working knowledge of available channels and their designated uses To activate a Call Channel 1 Press the CALL key to access the programmed channel 2 To return to your previous channel press the CALL key again Receiving and Transmitting Whenever the VHF 725e is powered up On it is in the receiving mode If the unit is m
38. tes 0 You should hear static If you hear a voice transmission change to another channel and repeat this step Figure 5 N While holding the Squelch SQ key down use the UP arrow key to increase the squelch level to 4 If no static is heard you have set an acceptable squelch threshold level If you hear static then increase to the next threshold level repeating the process until unwanted static is eliminated Release the SQ key to return to your selected channel The squelch setting is universal for all channels but it may require resetting from time to time NOTE During squelch adjustment Tri Watch and Scan are suspended GETTING STARTED Setting the Squelch Threshold Only Signals Stronger Than Level 5 Will Be Heard EXAMPLE of THRESHOLD SET AT LEVEL 5 Selected Squelch Level Up Down Keys Squelch SQ Key FIGURE 5 GETTING STARTED Low USA Z Ci A aa VOL PTTL Volume Level Indicator oe a Volume Decrease Increase FIGURE 6 LOW SCAN i MEM CAN T I TTT Scanning Display Band Select Channel Doom Om Memory Select Scanning Select FIGURE 7 18 Adjusting the Volume The Volume key may be adjusted using the keys The volume level is indicated by the band of gradually rising bars on the LCD display To adjust the volume 1 Press the key to increase the volume or the key to decrease the volume Figure 6 Scanning Channels
39. to coast communica tions Commonly called the Bridge to Bridge channel For routine operations radio power must be reduced to one watt Channel 15 Environmental Used by any vessel to receive only broadcast information concerning environmental conditions in which vessel operate such as weather sea conditions time signals and hazards to navigation One way broadcast from coast to ship stations Channel 16 Emergency Used if your vessel is sinking or on fire someone has been lost overboard or there is grave and imminent danger to life or property Every ship is obliged to give priority to radio distress communications Calling This channel is also used to establish communication with another marine radio station After contact is made switch to a working channel Due to congestion on channel 16 particularly in high traffic areas the FCC USA has approved channel 9 as a second hailing channel Channels 24 25 26 27 28 84 85 86 87 Marine Operator Can be used by any vessel to place a telephone call to any place in the world or to a vessel outside their transmitting range Used between vessels and public coast stations You must contact a marine operator on the channel assigned to your navigating area 13 Maritime Radio Services Operation 14 Private Channels These are channels that require special registration to use and must be programmed into the International Channel Band by your radio dealer Contact y
40. transceiver for inappropriate communica tions Know and observe the International Rules for Marine Radio Operation GETTING STARTED Table of Contents SECTION ONE Introduction Packitig LiStarencrusigee E REE i Regulatory Agency Compliance Statement 0 00005 ii OE ELETO ot A EE E iii iv SECTION TWO Getting Started Unit Descriptio irene a 2 3 Keys and Function Displays essssicsesisiiseirnsris 4 9 Maritime Radio Services Operation 10 14 Installing the Anitenniais cesnessczeceseaessris seceasseneysouset sucsaeaeneness 15 Instalime BANENE Sarete eana idre 15 16 Selecting a Channels psarne ana 16 17 Setting the Squelch Threshold s sissseeeeeeeeeeeeeee 17 Adjusting the Volume 0 cccceceeecceseeeeeeseeseteeteneeteeee 18 Scanning Channels siccin iosair rse eaa 18 19 Tri WatOh esit teiigaidniitiiriinne naaien eiieeii 19 20 Programming a Call Channels issrsssisriiionisir iis 20 Receiving and Transmitting 00 0 0 cece 21 23 Backlighting the LCD Display and Keypad 0 c 24 Using the Key Lock Feature 0 ccecccsecesceceeesesetenentenee 24 SECTION THREE Appendices Appendix A Optional Accessories 25 26 Appendix B Specifitati nS s sinsigesiinin issnin 27 Appendix C VHF Channel List 28 29 Appendix D Maintenance and Troubleshooting 30 32 Appendix E MeSSages cinia aaa 33 Appendix F GOSSA cru irihia innig ii 34 Appendix G Index i e seocciseescvintescent
41. y 1 to 2 inches from your mouth Low NOTE VHF Marine Radios communicate over SA distance by Line of Sight which means that the i signal may be blocked by objects such as land forms large vessels etc It is therefore important to transmit with the antenna in a vertical position and with the radio positioned as far above the water as is feasible VOL PTTL Transmit Display for Release the PTT key when you have completed Press and ooa Hold While your transmission Tanstitting NOTE You must use a specific communication style when using a marine radio such as your FIGURE 12 station call sign or boat name and ending your transmission with proper terminology such as Over Refer to the Maritime Radio User s Handbook Also be aware that the unit will automatically cancel TX after the PTT key has been pressed for more than thirty seconds to limit extensive transmissions and protect the unit from damage The FCC Canadian DOT and ITU prohibits the following communications False distress or emergency messages Messages to Any Boat except in emergencies and radio tests Messages to or from a vessel on land and transmission while on land Obscene indecent or profane language potential fine of 10 000 7 Remember to return to monitoring of Channel 16 23 GETTING STARTED Backlighting amp Key lock Features LOW Lock w VI calu J p a CELLUI Key Lock Display
42. yed on the LCD screen Channel 16 and Tri Watch Key Pressing this key once will monitor channel 16 the emer gency channel Pressing again will return to the last used regular channel Pressing and holding the key for more than 1 second will activate Tri Watch which monitors channel 16 and the programmed Call channel for the currently monitored band and a working channel PTT Press To Talk Key This Key allows the operator to transmit over those regular band channels that permit transmission Press and hold the key to talk and release to receive GETTING STARTED Keys amp Function Displays Memory Key Scan Key 40 U I C Frequency Bands Key Emergency Channel I i5 Pic Regular Channel F A_ A Channel 16 Key TRI Emergency Channel y me i us E Call 1e Channel p Z Working Channel Tri Watch Key je PIT Key GETTING STARTED Keys amp Function Displays sa Squelch Key a H L Power Key Squelch Key This key breaks the squelch unmutes the audio when pressed and held It is also sed to set the squelch threshold the level at which only strong signals can be received The squelch threshold is set by pressing and holding the squelch key while using the UP DOWN keys to adjust the squelch level from 0 to 9 At level 0 all signals can be heard while at level 9 only the stron gest signals can be heard Adjusting the squelc
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