GME TX680 User manual

3 watt handheld UHF CB radio
INSTRUCTION MANUAL

TX680 INSTRUCTION MANUAL Page 3
Page 2 INSTRUCTION MANUAL TX680
The TX680 is a radio transmitting device.
 •Whentransmitting,keeptheantennamorethan25mmfromanypartofthehead
orbody.
 •Donottransmitnearelectricalblastingequipmentorinexplosiveatmospheres.
 •Donotallowchildrentooperatearadiotransmitterunsupervised.
CONTENT S
WARNING - SA FET Y I N FORMATI ON
IMPOR TANT
ACCESSOR IES SUPPLIED
•Li-IonBatteryPack(1000mAh)
•Semi-QuickCharger
•ACAdapter
•CarryCase
READ ALL INSTRUCTIONScarefully
andcompletelybeforeoperatingyour
radioandretainthismanualforfuture
reference.
NEVERconnecttheradiotoapower
sourceotherthanthesuppliedbattery.
Thismaydamageyourproduct.
DO NOTplaceyourradioinfrontofa
vehicleairbag.
DO NOTuseyourradiowitha
damaged antenna.
DO NOT attempttomodifyyourradio
inanyway.
ALWAYS chargeyourradioatnormal
roomtemperature.
ALWAYSswitchoffyourradiowhere
noticesrestricttheuseoftwo-way
radioormobiletelephones.
ONLYuseGMEapproved
rechargeablebatterieswiththe
suppliedcharger.
AVOID exposingyourradiotowater.
Itisnotwaterproof.
AVOIDstoringorchargingyourradio
indirectsunlight.
AVOIDstoringorusingyourradio
wheretemperaturesarebelow-20°C
orabove+60°C.
IMPOR TANT INFORM ATION
CONCERNING UHF CB R ADI O
 TheuseoftheCitizenBandradioserviceislicensedinAustraliabytheACMA
Radiocommunications(CitizensBandRadioStations)ClassLicenceandinNewZealand
bytheMinistryofEconomicDevelopmentNewZealand(MED).AGeneralUserRadio
LicenceforCitizensBandradioandoperationissubjecttoconditionscontainedin
thoselicences.
 TheclasslicenceforusersandequipmentoperatingintheCB/PRS477MHzbandhas
beenamended.Thisradiomeetsthenew80channelstandard.
Insimpletermsthesameamountofspectrumisavailable;however, radio transceivers
cannowoperateinanarrowerbandwidthandhenceuselessspectrum.Theseradios
aregenerallyreferredtoasnarrowbandor12.5kHzradios.Byusing12.5kHzchannel
spacinginsteadof25kHz,the40channelsoriginallyallocatedcannowbeexpanded
to80channelstherebydoublingthechannelcapacityandrelievingcongestioninthe
UHFCB/PRSband.
ACCESSORIESSUPPLIED ...............2
SAFETYINFORMATION ................2
IMPORTANTINFORMATION.............3
 PossibleIssues ..................4
TELEMETRYCHANNELS................5
FEATURES..........................5
CONTROLS.........................6
LCDINDICATORS ....................7
POWERINGTHERADIO ................8
GENERALOPERATION................10
 PowerOn/Off..................10
 AdjustingtheVolume............10
 DisplayLighting ...............10
 ReceivingSignals ...............10
Transmitting...................10
 SelectingChannels ..............11
 SQLKey.....................11
CTCSS ......................11
 Duplex/MonitorKey .............11
 SCANKey .....................12
 Key-LockFunction...............13
MODEKEY. .......................13
 1.CTCSSCodeSelection.........13
 2.TransmitterPower ............14
3.VOXSettings................15
 4.DualWatchSettings ..........15
 5.ButtonBeepToneSettings .....16
 6.CallAlarmSelection ..........16
CTCSSTONEFREQUENCIES...........17
UHFCBOPERATINGFREQUENCIES .....18
SPECIFICATIONS ...................20
SCCONTRACTWARRANTY
AGAINSTDEFECTS .................21

TX680 INSTRUCTION MANUAL Page 5
Page4 INSTRUCTIONMANUAL TX680
TELEME TRY CHANNELS
ACMAregulationshaveallocatedchannels22and23fortelemetryonlyapplicationsand
haveprohibitedthetransmissionofspeechonthesechannels.ConsequentlytheTX680
hasatransmit-inhibitappliedtochannels22and23.
Intheeventthatadditionaltelemetry/telecommandchannelsareapprovedbytheACMA,
thesechannelsshallbeaddedtothosecurrentlylistedwherevoicetransmissionis
inhibited.Currentlytransmissionsonchannels61,62and63arealsoinhibitedandthese
channelsarereservedforfutureallocation.
FEATU RES
•Microprocessor Controlled Frequency Synthesiser:Allowsuserprogrammable
controlofscanning,channelmemoriesandselectedfeatureoptions.
•
Programmable Scan Function:Scansupto80UHFCBchannels.
•In-built CTCSS:UserselectableContinuousToneCodedSquelchsystemforquiet
channeloperation.
•3 watt/1 watt RF Power: Whentransmittingincloserangeyoucanconserve
batterypowerbyusingtheLowPowersetting.
•Individually Programmable Duplex Function:Userselectableforthose
individualrepeaterchannelsinyourarea.
•Power-Save Feature: Sleepsduringperiodsofinactivity.
•Keypad Lock: Preventsaccidentalbuttonpresses.
•Backlit LCD: Fornightviewing.
•Calling Tone/Roger Beep: Alertsyoutoincomingcalls.
•Dual Watch: Monitorstwochannelssimultaneously.
•VOX: Voiceactivatedtransmitforhandsfreeoperation.
•Removable Flexible Antenna
•Semi-Quick Charger
•Signal Strength Indicator
POSSIBLE ISSUES
Whenanewnarrowbandradioreceives
atransmissionfromanolderwideband
radiothespeechmaysoundloudand
distorted–simplyadjustyourradio
volumeforbestperformance.
Whenanolderwidebandradioreceivesa
signalfromanewnarrowbandradio,the
speechmaysoundquiet-simplyadjust
yourradiovolumeforbestperformance.
Dependingonhowcloseyourreceiving
radioistoanothertransmittingradio,
therecanbeinterferencefromthe
transmittingradioifitisusingachannel
adjacenttothechannelyouarelistening
to.Simplytrygoingupordownafew
channelsfromthecurrentlyselected
channel.
Theabovesituationsarenotafaultof
theradiobutasymptomofoperating
widebandandnarrowbandradiosin
thesamebandwidth.Thispossible
interferencewilldecreaseovertimeasthe
populationofwidebandradiosagesand
decreases.
Furtherinformationandupdates
areavailablefromtheAustralian
CommunicationsandMediaAuthority
(ACMA)atwww.acma.gov.au and the
MinistryofEconomicDevelopment(MED),
RadioSpectrumManagementat:
www.rsm.govt.nz
TheACMAhasallocatedchannels5/35
foremergencyuseonly.Channel5isthe
primarySimplexEmergencyChannel.
WhereaChannel5repeaterisavailable,
youshouldselectDuplexonCH5.
NOTE: Channel35istheinputchannel
fortheChannel5repeatertherefore
Channel35shouldalsonotbeused
foranythingotherthanemergency
transmissions.
Original40channelwidebandRadioswillcontinuetooperateontheoriginal40
channels,howevertheywillnotbeabletoconverseonthenewerchannels41–80.The
newernarrowbandradioswillbeabletoconversewithallolder40channelwideband
radiosonallchannels1to40aswellasthenewerchannelsallocatedfrom41to80.
 Themixingofnarrowbandandwidebandradiosinthesamespectrumcancause
somepossibleoperatingissuesofinterferenceandvaryinglevelsofreceivedvolume.

TX680 INSTRUCTION MANUAL Page 7
LCD INDICATORS
1. Battery
2 Scan
3. Squelch/CTCSSKey
4. BatteryReleaseClip
5. Push-To-Talk(PTT)Switch
6. ModeKey
7. Microphone
8. IndicatorLED
9. Antenna
10.Duplex/KeylockButton
11.VolumeOn/Off
12.ExternalSpeaker/Mic
13.Speaker
14.LCDDisplay
15.ChannelUp
16.ChannelDown
TX680
4
3
2
1
9
8
7
6
10
11
12
13
14
15
16
5
CONTROLS
1. Receiver Busy Icon:Appearswhen
receiving.
2. T ransmit Icon:Appearswhen
transmitting.
3. Dual Watch Icon:Appearswhenthe
DualWatchmodeisActive.
4. Key Lock Icon: Appearswhenthe
keypadislocked.
5. Button Beep Tone Icon:Appears
whenthebuttonbeepconfirmation
toneisselected.
6. CTCSS (CTC) Icon: Indicates that
CTCSStonesareenabledonthe
selectedchannel.
7. Squelch/Monitor Icon:Appears
whentheMonitorfunctionisactivated.
(Squelchisopen)
8. Battery Level Icon: Indicatesbattery
chargelevel.Flasheswhenbatteryis
almostempty.
9. High Power Icon: Appearswhen
Hightransmitterpowerisselected.
10. Low Power Icon: AppearswhenLow
transmitterpowerisselected.
11. Duplex Icon:IndicatesthatDuplex
communicationhasbeenenabled.
12. Voice Activated Transmission
(VOX) Icon:AppearswhentheVOX
mode is activated.
13. CTCSS Tone: Displaystheselected
CTCSStone(from00-38)onthe
selectedchannel.
14. Channel Display: Indicates the
channelnumberinuse.
15. S can Indicator Icon:Appearswhen
SCANisenabledandtheradiois
scanning.
16. Channel Memory Indicator:
Appearswhenselectedchannelis
storedinScanMemory.
Page 6 INSTRUCTION MANUAL TX680

Page 8 INSTRUCTION MANUAL TX680 TX680 INSTRUCTION MANUAL Page 9
POWERING THE RADIO
YourTX680ispoweredbya7.4Volt
1000mAhLi-Ionbatterypack.Whenthe
batterypackisnew,itshouldbefully
chargedbeforebeingusedforthefirst
time.Ifleftunused,yourTX680’sbattery
packwilldischargeitselfwithinafew
months.IfyouhavenotusedyourTX680
forsometime,youwillneedtorecharge
thebatterypackbeforeuse.
WARNING: UseonlytheapprovedGME
charger.Theuseofothertypesmaybe
dangerousandwillvoidthewarranty.
Fitting the Battery Pack
Tofitthebatterypack:
1. Locatethebottomofthebatterypack
intothetwoslotsinthebaseofthe
radioframe.
2. Pressthetopofthebatterypackinto
placeagainsttheradiountilit‘clicks’.
To Remove the Battery Pack
1. Slidethebatteryretainingclip
downwardwhilepullingthetopofthe
batteryawayfromtheradio.
2. Liftthebatterypackupwardtoclear
theslotsatthebottomoftheradio.
Charging the Battery Pack
YourTX680issuppliedwithanAC
adaptorandaSemi-quickcharger.The
chargerwillchargeafullydischarged
1000mAhbatterypacktofullcapacityin
around3-4hours.
1. Plugthechargerintoastandard240
VoltACoutlet.
2. Plugtheleadfromthechargerintothe
chargingcradle.
3. PlacetheTX680intothecradle.The
RedLEDwilllighttoindicatethe
batteryischarging.
4. Whenthebatteryhascharged,theLED
willchangetoGreen.
Battery Low Alert
Whenthebatteryiconblinksonthe
display,thebatterylevelislowandthe
batterypackshouldberecharged.Ifthe
batteryisnotcharged,anaudiotone
willthensoundtowarntheuserthatthe
batteryisalmostdischarged.
Battery Usage
Thetimetakentodischargethebattery
packwilldependonhowyouusethe
TX680.The1000mAhbatterypack
suppliedispowerfulenoughforafulldays
useunderaverageconditions.
Conserving Battery Power
TheTX680hasbuilt-inpowersaving
featurestohelpyougetthemaximum
amountoftimebetweenchargesfrom
yourLi-Ionbatterypack.Ifyouneedto
operateyourTX680inasituationwhere
yourequiremaximumbatterylife(e.g.a
remotesitewherethereisnoconvenient
rechargingfacilitynearby)thefollowing
hintscangreatlyreducetheamountof
powerdrawnfromthebatterypack.
Standby Mode
TheTX680willautomaticallyenterthe
‘Standby’modewhenitisinactive(i.e.
nottransmittingorreceivingsignals.
WhileinStandbymodeitwillstillcheck
forincomingsignalsbutitwilldraw
considerablylesspowerfromthebattery
pack.Assoonasasignalisheardorthe
keysarepressedtheTX680will‘wakeup’
again.ThisStandbymodeisautomatic
andbyitselfcanextendthebatterylifeby
manyhours.
Using CTCSS
Ifyouareexpectingtoreceivesignalson
abusychannel,youcanprogramthat
channelforCTCSSoperationandgetthe
otherpersontocallyouusingthesame
CTCSStone.Yourradiowillthenremainin
Standbyandignoreallothersignalsuntil
yourselectedCTCSStoneisreceived.
Scanning
TheTX680drawsmorepowerfromthe
batterypackwhenscanningthanwhen
monitoringasinglechannel.Thisis
becauseitmust‘wakeup’moreoftento
monitoreachchannelforactivity.You
cansqueezethatextrabitoflifefromthe
batterypackbyavoidinganyunnecessary
scanning.Inaddition,scanningincreases
thechanceoffindingasignalthereby
keepingthereceiver‘awake’andthe
squelchopenmoreoften.
Low Transmit Power Settings
Thetransmitterhasbothhighandlow
powersettings.Ifyouareonlyoperating
overshortdistances,areinareasonably
highlocationorareclosetoalocal
repeater,tryusingtheLowtransmitter
powersetting.Thisreducesthetransmitter
powerfrom3wattsto1watteffectively
doublingthetalktimeavailable.
To Remove Battery Pack
Swing
Away
Slide
Down
To Refit Battery Pack
Press Press

Page10 INSTRUCTION MANUAL TX680 TX680 INSTRUCTION MANUAL Page 11
GENERAL OPERATION
POWER ON/OFF
RotatetheVolumecontrolclockwisepast
the‘click’toturntheradioon.Rotatethe
controlcounter-clockwisepasttheclickto
turntheradiooffagain.
ADJUSTING THE VOLUME
Withtheunitpoweredon,rotatethe
Volumecontrolclockwisetoincreasethe
volumeandcounter-clockwisetodecrease
thevolume.
DISPLAY LIGHTING
TheLCDbacklightingactivates
automaticallywheneverakeyispressed
andturnsoffautomaticallyafterabout5
seconds.
RECEIVING SIGNALS
WhiletheTX680isnotreceivingsignals,
itwillremainintheStandbymodeto
conservebatterypower.Whenasignalis
received,theLEDindicatorontheupper
edgeoftheradiowilllightGreenandthe
iconwillappearonthedisplay.Adjust
the volumecontrolforacomfortable
listeninglevel.
Iftheincomingsignalisencodedwitha
CTCSS tone that matches the one set in
yourradio,theLEDindicatorwilllight
Orangeandyouwillbeabletohearthe
signalinthespeaker.
IftheLEDindicatorlightsGreenand
the iconappearsbutyoucannothear
thesignal,itislikelythatyourradiohas
CTCSSenabledandtheincomingsignalis
notusingyourselectedCTCSStone(see
ModeSettingsformoredetailsonCTCSS
settings).
Ifnofurthersignalsarereceived,theunit
willreturntostandbymode.
TRANSMITTING
Totransmit,pressandholdthePush-To-
Talk (PTT)switch.Theotherradioyou
aretalkingtomustbesettothesame
channel(andCTCSScodeifapplicable).
HoldtheTX680approximately5to8cms
fromyourfacewiththeantennavertical
andspeakintothebuilt-inmicrophone.
WhilethePTTswitchispressed,theLED
indicatorontheupperedgeoftheradio
willlightREDandthe iconwillappear
ontheLCD.
Whenyouhavefinishedspeaking,release
the PTTswitchtoreceiveincomingsignals
(itisnotpossibletotransmitandreceive
atthesametime).Ifnofurthersignalsare
received,theunitwillreverttostandby
mode.
TIP: ThePTTswitchcanalsobeusedto
totransmitaCallAlarmmelody.When
theCallAlarmmelodyisenabled(see
ModesettingsformoredetailsontheCall
Alarmsettings),pressingthePTTswitch
twicequicklywillcallanotherpartyon
thesamechannelandplaytheCallAlarm
melodyintheirradio’sspeaker.Whenthis
happens,the iconwillappearandthe
LEDindicatorwilllightREDforabout5
seconds.Thecallalarmcanonlybesent
onceperminute.
SELECTING CHANNELS
Inthe‘Standby’mode,pressthe keyto
stepuponechannelorthe keytostep
downonechannel.
Pressandholdthe or keysto
quicklyscrollthroughthechannels.
SQL KEY
The SQLkeyisadualfunctionkeythat
controlsboththeSquelchandCTCSS
Squelch
Toopenthesquelch,brieflypressthe
SQLkey.Thiswillallowyoutocheck
thecurrentchannelforactivitybefore
transmitting,particularlyifyouhave
CTCSSenabled.Whenthesquelchis
open,theLEDindicatorontheupper
edgeoftheradiowilllightGreen,the
iconwillappearonthedisplayand
youwillhearstaticorhissifthechannel
isclear.Donottransmitifyouhearany
conversations.BrieflypresstheSQLkey
againtoclosethesquelch.
CTCSS
PressandholdtheSQLkeytoactivate
ordeactivateCTCSS.Whenactivated,
the‘CTC’iconwillappearonthedisplay,
alongwiththeselectedCTCSScode.
NOTE: To activateordeactivateCTCSS,
thecurrentchannelmusthaveaCTCSS
codeselectedviatheMODEkey(See
MODEkeysettingsformoredetails).
DUPLEX/MONITOR KEY
The Duplex/Monitorkeyisadual
functionkeythatcontrolsboththeDuplex
andMonitorfunctions.
DUP Key
PressthisbuttontoselectDuplexmode
onchannels1–8and41–48.Duplex
canbeenabledordisabledseparatelyon
individualchannels.
DuplexoperationallowstheTX680to
transmitonadifferentfrequencytothat
whichitreceives.Thisallowsoperation
throughrepeaterstationsinyourarea.
Repeatersautomaticallyre-transmityour
signaloveramuchwiderarea,providing
greatlyincreasedrange.TheDuplexmode
onlyworksonchannels1–8and41–
48.WithDuplexselected,yourTX680
actuallytransmits30channelshigherthan
it receives.
To Activate the Duplex Mode
Selectaduplexchannel(1–8or41
–48).BrieflypresstheDUPbuttonto
toggleduplexonoroffonthatchannel.
WhenDuplexmodeisenabledonthe
selectedchannel,‘DUP’appearsonthe
display.

Page12 INSTRUCTION MANUAL TX680 TX680 INSTRUCTION MANUAL Page 13
Channel
Selected
Receive
Channel
Transmit
Channel
1 1 31
2 2 32
3 3 33
4 4 34
5* 5* 35*
6 6 36
7 7 37
8 8 38
41 41 71
42 42 72
43 43 73
44 44 74
45 45 75
46 46 76
47 47 77
48 48 78
*Emergencychannelonly
SCAN KEY
The SCANkeyisadualfunctionkeythat
controlsbothScanandMemoryFunctions
Scanning Function
ChannelScanningallowsyoutomonitor
selectedchannelsautomaticallyfor
incomingsignals.Whiletheradiois
scanning,theMODEsettingkeyis
disabled.
To Select Channels for Scanning
1. Pressthe or keystoselectthe
requiredchannel.
2. PressandholdtheSCAN keyuntilthe
radiobeeps.‘M’willappearonthe
displayindicatingtheselectedchannel
isnowstoredintheScanMemory.
3. Repeattostorefurtherchannelsinto
theScanMemory.
4. ToremoveachannelfromtheScan
Group,pressandholdtheSCANkey
again.‘M’willdisappearfromthe
display.
To Scan the Selected Channels
BrieflypresstheSCANkey.‘SCAN’willbe
displayedandtheradiowillshowrapidly
changingchannelnumbersasitscans
throughthechannels.Whilescanning,
brieflypressthe or keystoselectthe
scan direction.
Toexitthescanmode,brieflypressthe
SCANkeyagain.TheTX680willreturn
tonormaloperationand‘SCAN’will
disappearfromthedisplay.
NOTE: Mustbeatleast2channelsin
ScanMemoryotherwisetheradiowill
not scan.
Scanning Features
• Ifasignalisreceived,thescanis
paused,allowingyoutotransmitand
receiveonthatchannel.Theradiowill
automaticallyresumescanningafew
secondsafterthelastreceptionor
transmission.
• PressthePTTswitchwhiletheunitis
scanningtojumptothehomechannel
(thehomechannelisthechannelthe
Radiowasonatthetimescanningwas
activated).Youcanthentransmit
andreceiveonthatchannel.Theradio
willautomaticallyresumescanninga
fewsecondsafterthelastreception
or transmission.
• Whentheunithasstoppedonabusy
channel,pressthe or keysto
‘Skip’overthebusychanneland
continuescanning.
TIP: Thescanmodewillreducetheoverall
batterylifebecausetheStandby(battery
saver)featureisoverridden.Youshould
avoidscanningifthebatteryisrunning
lowandyouneedtoconservepower.
KEY-LOCK FUNCTION
The Key-Lockfunctiondisablesthekeys
topreventaccidentalkeypressesfrom
changingthepreferredsettingsofthe
radio.Whenthekeysarelocked,the
Iconisdisplayedandallkeypressesare
ignoredexceptforthePTTandKey-Lock
functions.
ToactivatetheKey-Lock,pressandhold
the DUPbuttonforabout2seconds.The
iconwillappearonthedisplay.
TocanceltheKey-Lock,pressandhold
the DUPbuttonagain.The iconwill
disappearfromthedisplay.
MODE KEY
The MODEkeyisusedtosetthevarious
featuresettingsoftheTX680.The
followingchartshowstheorderofthese
selections.
Standby Mode:
  1.CTCSSCodeSelection
  2.TransmitterPower
  3.VOXSettings
  4.DualWatchChannel
  5.ButtonBeepSelection
  6.CallAlarmSelection
1. CTCSS CODE SELECTION
TheContinuousToneCodedSquelch
System(CTCSS)isasquelchquieting
systemthatallowsgroupsofusers
tosharethesamechannelwithout
disturbingeachother.Ituses1of38low
frequencytonestoopenandclosethe
squelchontheradio.TheCTCSScodes
donotpreventothersfromhearingyour
transmission.Theysimplyprovideyouwith
aquieterchannelbypreventingyoufrom
hearingtransmissionsthatarenotusing
thesamecodeasyouandaretherefore
notdirectedatyou.

Page14 INSTRUCTION MANUAL TX680 TX680 INSTRUCTION MANUAL Page 15
NOTE: TocommunicatewithotherUHF
radiosusingCTCSS,allradiosyouwish
tocommunicatewithmustbeswitched
tothesamechannelandhavethesame
CTCSScodeselected.Ifyouwishto
receivesignalsfromUHFradiosthatare
notusingCTCSSyouwillneedtoeither
disableCTCSSonthatchannelorsetthe
CTCSS code to ‘oF’asdescribedbelow.
To Select a CTCSS Code
FromtheStandbymode:
1.Selecttherequiredchannelusingthe
or keys.
2. Press the MODEkeyONCEtoselect
theCTCSSsettingmode.‘CTC’will
flashonthedisplay.
3. Press the or keystoselectthe
requiredCTCSScode.(Alistofavailable
codesisshowninthechartattheend
ofthismanual).
N OTE : ToturnCTCSSoffonthis
channel,settheCTCSScodeto‘oF’.
4.PressandholdtheMODEkey(orpress
the PTTkeymomentarily)toconfirm
andstoreyourselection.
To Activate CTCSS on the Radio
1.SelectachannelthathasaCTCSS
codeselected.
2.PressandholdtheSQL keyforabout
2seconds.The‘CTC’iconandCTCSS
codewillappearonthedisplay.CTCSS
isnowenabledonALLchannelsthat
haveCTCSScodesselected.
To Deactivate CTCSS on the Radio
1.SelectaCTCSSenabledchannelusing
the or keys.The‘CTC’iconand
CTCSScodewillbedisplayedon
thatchannel.
2.PressandholdtheSQLkeyforabout
2seconds.The‘CTC’iconandCTCSS
codewilldisappearfromthedisplay
indicatingCTCSSisnolongeractivated.
NOTE: CTCSSisonlyenabledonthose
channelswithCTCSScodesselected.
Allotherchannelswill continueto
operatenormally.
2. TRANSMITTER POWER
ThetransmitterpowercanbesettoHigh
(3watts)orLow(1watt).Thepower
settingappliestoallchannels
To Set the Transmit Power
FromtheStandbymode:
1.PresstheMODEkeyTWICEtoselect
thepowersettingmode.‘Po’willbe
displayedandHIorLOwillbeflashing
onthedisplay.
2. Press the or keystoselectthe
requiredpowersetting.SelectHIfor
highpowerorLOforlowpower.
3.PressandholdtheMODEkey(orpress
the PTTkeymomentarily)toconfirm
andstoreyourselection.
TheTX680shouldnowdisplaythe
selectedchannelnumberalongwithHI
orLOtoindicatethetransmitpoweryou
have set.
3. VOX SETTINGS
TheVOXfeatureletsyouhavehands
freeconversations.Whenyouspeak,the
microphoneautomaticallydetectsyour
voice(orothernearbysound)causing
theradiototransmitwithouttheneedto
pressthePTTswitch.
To Set Radio for VOX Operation
FromtheStandbymode:
1.PresstheMODEkeyTHREEtimesto
selecttheVOXsettingmode.‘VOX’will
flashonthedisplay.
2. Press the or keystoselectthe
sensitivityfrom1(minimum)to7
(maximum).Theminimumsetting
requiresaloudervoicetoactivatethe
VOX.Themaximumsettingwillactivate
theVOXwithamuchsoftervoice.
3.TodisabletheVOXcompletely,setthe
VOXsensitivityto‘oF’
4.Pressandholdthe MODEkey(or
pressthePTTkeymomentarily)to
confirmandstoreyourselection.When
the‘VOX’isenabled,‘VOX’isvisibleon
thedisplay.
4. DUAL WATCH SETTINGS
TheDualWatchmodeletsyoutomonitor
twochannelsatthesametime.Whilein
dualwatchmode,theunitwillmonitor
boththecurrentlyselectedchannelanda
seconddualwatchchannel.
To Set the Dual Watch Mode
FromtheStandbymode:
1.PresstheMODEkeyFOURtimesto
selecttheDualWatchsettingmode.
The iconwillflashonthedisplay.
2. Press the or keystoselectthe
DualWatchchannelnumber(1–40).
TodisabletheDualWatchMode
altogetherselect‘oF’.
3.PressandholdtheMODEkey(or
pressthePTTkeymomentarily)to
confirmandstoreyourDualWatch
channelselection. willbedisplayed
atthetopoftheLCDandthedisplay
willnowalternatebetweenthe
currentlyselectedchannelandthedual
watchchannel.
ToEXITtheDualWatchmode,turnthe
radiooff,ormomentarilypresstheSCAN
key.ThisisequivalenttosettingtheDW
modeto‘oF’.
Dual Watch Operation
• IfasignalisreceivedontheDual
Watchchannel,theradiowillpauseon
thatchannelforaslongasitremains
busy,thenresumetheDualWatch5
secondsafterthelasttransmission
has ceased.
• Ifyouwishtotalkonthebusychannel,
pressthePTTswitchwhiletheradiois
lockedontothatchannelthentalkin
theusualway.
• Ifyouwishtotalkontheselected
channel,pressthePTTswitchwhileno
signalsarebeingreceived.Theradio
willswitchtotheselectedchannel.

TX680 INSTRUCTION MANUAL Page 17
5. BUTTON BEEP TONE SETTINGS
TheButtonbeeptonefeatureallows
theRadiotosoundaconfirmationtone
whenevertheSQL,SCAN,MODE, ,
or DUPkeysarepressed.
To Turn the Button Beeps Tones On
or Off
FromtheStandbymode:
1.PresstheMODEkeyFIVEtimesto
selecttheButtonBeepsettingmode.
‘bP’willbedisplayedalongwitha
flashing icon.
2. Press the or keystosetthebeep
to‘On’or‘oF’asdesired.
3.PressandholdtheMODEkey(or
pressthePTTkeymomentarily)to
confirmandstoreyourselection.Ifthe
ButtonBeepfunctionison,the icon
willremainsteadyonthedisplayanda
beepwillbeheardinresponsetokey
activations.
6. CALL ALARM SELECTION
TheTX680provides5userselectablecall
alarmmelodiestoalertotheruserstoyour
incomingcall.Whenenabled,themelody
canbetransmittedtoanotheruserwhere
itwillbeheardinthespeakerofthe
receiving radio.
To Select your Favourite Call Alarm
Melody
FromtheStandbymode:
1.PresstheMODEkeySIXtimesto
selecttheCallAlarmsettingmode.‘C’
willbedisplayed.
2. Press the or keystopreview
(listen)tothe5availablecallmelodies.
3.Toturnthecallmelodiesoff,select
‘oF’.
4.PressandholdtheMODEkey(or
pressthePTTkeymomentarily)to
confirmandstoreyourselection.
To Send the Call Alarm Melody
Press the PTTswitchtwicequickly.
TheLEDindicatorwilllightRedfora
fewsecondsasthemelodyissent.The
melodywillbeheardinthespeakerofthe
receiving radio.
Thecallalarmcanonlybesentonce
perminute.
Page16 INSTRUCTION MANUAL TX680
CTCSS TONE FREQUENCIES
No. Frequency No. Frequency No. Frequency
1 67.0 14 107.2 27 167.9
2 71.9 15 110.9 28 173.8
3 71.9 16 114.8 29 179.9
4 77.0 17 118.8 30 186.2
5 79.7 18 123.0 31 192.8
6 82.5 19 127.3 32 203.5
7 85.4 20 131.8 33 210.7
8 88.5 21 136.5 34 218.1
9 91.5 22 141.3 35 225.7
10 94.8 23 146.2 36 233.6
11 97.4 24 151.4 37 241.8
12 100.0 25 156.7 38 250.3
13 103.5 26 162.2 OF 0
(CTCSSfrequencyshowninHz)

Page18 INSTRUCTION MANUAL TX680 TX680 INSTRUCTION MANUAL Page 19
UHF CB OPERATING FREQUENCIES
Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz)
1 476.425~ 21 476.925 41 476.4375~ 61• 476.9375
2 476.450~ 22# 476.950 42 476.4625~ 62• 476.9625
3 476.475~ 23# 476.975 43 476.4875~ 63• 476.9875
4 476.500~ 24 477.000 44 476.5125~ 64 477.0125
5* 476.525~ 25 477.025 45 476.5375~ 65 477.0375
6 476.550~ 26 477.050 46 476.5625~ 66 477.0625
7 476.575~ 27 477.075 47 476.5875~ 67 477.0875
8 476.600~ 28 477.100 48 476.6125~ 68 477.1125
9 476.625 29 477.125 49 476.6375 69 477.1375
10 476.650 30 477.150 50 476.6625 70 477.1625
11+ 476.675 31 477.175~ 51 476.6875 71 477.1875~
12 476.700 32 477.200~ 52 476.7125 72 477.2125~
13 476.725 33 477.225~ 53 476.7375 73 477.2375~
14 476.750 34 477.250~ 54 476.7625 74 477.2625~
15 476.775 35* 477.275~ 55 476.7875 75 477.2875~
16 476.800 36 477.300~ 56 476.8125 76 477.3125~
17 476.825 37 477.325~ 57 476.8375 77 477.3375~
18 476.850 38 477.350~ 58 476.8625 78 477.3625~
19 476.875 39 477.375 59 476.8875 79 477.3875
20 476.900 40^ 477.400 60 476.9125 80 477.4125
*Emergencyuseonly
+Officiallydesignatedcallchannel
#Telecommand/Selcalluseonly.Voicetransmissionis
inhibitedasrequiredbyAS/NZS4365:2011.
^Roadchannel
~Repeaterchannels
•Guardbandchannels.Voicetransmissionis
inhibitedasrequiredbyAS/NZS4365:2011.