Manual Seiko S770 (page 7 of 24) (English)

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HowtosettheTime,DateandDay(RadioSingalReception)

Ohtakadoya-yama

transmitting

station(40kHz)

Hagane-yama

transmitting

station(60kHz)

Approximately

1,000km

Approximately

1,000km

※

Evenifthewatchislocatedwithintheradiosignalreceptionrange,thewatchmayfailtoreceiveradiosignalsdependingonits

receptoinenvironmentwhichisofteninﬂuencedbyacombinationoffactorsincludingweather,terrain,buildings,directionetc.

→Conditionsinwhichthewatchmaybeunabletoreceiveradiosigbnals⇒P118

■Roughguideofradiosignalreceptionrange:Japan(JJY)

JJYisoperatedbytheNationalInstituteofInformationand

CommunicationsTechnology(NICT).

JJYistransmittedfromtwostationsinJapan.Eachstation

transmitsJJYindiﬀerentfrequencies.

Fukushima(Ohtakadoya-yamatransmittingstation:40kHz)

Kyushu(Hagane-yamatransmittingstation:60kHz)

Asaroughguide,radiosignalreceptionrangeiswithin

anapproximateradiusof1000kilometersfromthe

transmittingstation.

WhenTYO(Tokyo),SEL(Seoul)orHKG(HongKong)isselectedforthecitycode

ofthehometime,thewatchreceivesstandardfrequencysignalsofJapan.

※

WhilethewatchisreceivingstandardfrequencysignalsofJapan

(JJY),theJP40orJP60indecatorappearsonthedisplay

113

HowtosettheTime,DateandDay(RadioSingalReception)

Receptionenvironment

Thiswatchcanreceivestandard frequencysignalsofJapan(two transmitting stations), Germany,

theUnitedKingdomandtheUnitedStatesofAmerica.Bysettingthecitycodeofthehometime,you

canchoosethetransmittingstationfromwhichthewatchreceivesstandardfrequencysignals.

→Howtosetthehometimecityanddst(Daylightsavingtime)⇒P120

Japan（JJY）

P113 UnitedStates

ofAmerica

（WWVB）P116

United

Kingdom

(MSF)P115

Germany

(DCF77)P114

■Radiosignalreceptionrange

112

HowtosettheTime,DateandDay(RadioSingalReception)

※

Unlessthecitycodeofthehometimeiscorrectlyset,thewatchmayfailtoreceiveradiosignals.Ensurethatthe

citycodeofthehometimeiscorrectlyset. →Howtocheckthesettingsofthewatch(Miscellaneousinformation

display) ⇒ P106

※

Thereceptionenvironmentwillofteninﬂuencewhetherthewatchsuccessfullyreceivesradiosignals. →To Imp r ove

radiosignalreception ⇒ P117 →Conditionsinwhichthewatchmaybeunabletoreceiveradiosignals⇒P118

※

Thewatchisunabletoreceiveradiosignalsoutsidetheradiosignalreceptionrange →Radiosignalreception

range ⇒P112

・Manualreception



Whenthiswatchcannotautomaticallyreceivearadiosignaldue toadifficult

receivingenvironment,itispossibletoreceivethemarbitrarilyatanytime.

 →Howtoconductmanualreception P156

・Automaticreception



Thiswatchsetsthetime,dateanddaybyautomaticallyreceivingaradiosignalataﬁxedtime.Thiswatch

automaticallyreceivesaradiosignalat2:00AMand4:00AM.



AutomaticreceptioniscarriedoutonlywhenthewatchiseitherintheTIMEmodeorintheWORLDTIMEmode.

■Automaticreceptionandmanualreception

※Whenthiswatchsuccessfullyreceivesaradiosignal,itwillstopautomaticrecetion.

・

Placethewatchinaplacewhereitcaneasilyreceivearadiosignalsuchasnearawindow.

・Whilethewatchisreceivingradiosignals,donotmoveit.

→ToImproveradiosignalreception P117

111

HowtosettheTime,DateandDay(RadioSingalReception)

■Mechanismofradiosignalreception

SettingtheTime,DateandDaybyreceivingaradiosignal

Theradio-controlledwatchdisplaystheprecise Time,Dateand Daybyautomatically

receivingandsynchronizingitselfwiththeradiosignalofanoﬃcialstandardfrequency.

Transmit ting

Station

Cesium

AtomicClock

Radio-controlledwatch

Receiveradiosignals

throughtheantenna

insidethewatch

↓

Analyzetime

information

↓

Displaythecurrent

Time,DateandDay

Officialstandard

frequency

Timesignaltransmittedbyastandardfrequencyisbasedonasuperaccurate"Cesium

AtomicClock"thatmayhavea1secondlossorgainperonehundredthousandyears.

110

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Seiko S770 Manual

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