MasterclockGMRUserManualv2–2016.12
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Unitswith6‐digitLEDswillshowall8s,thenwilldisplaytimeand/ordateaccordingtothesettingstheuser
hasmade.
YellowNTPLEDsignifyingNTPstatus:Off
YellowPTPLED(ifpresent):Off
GreenLOCKLED:Blinkstwicepersecond,withtimeincrementingeach
second.Thisindicateslocktointernal
OCXOoscillatorandacquiringlocktoanexternalsource,ifapplicable.
GreenLOCKLED:Blinkstwicepersecond.Thisindicatessynchronizationtoanexternalreference
CONFIGURETHEGMR
USINGYOURPREFERREDMETHOD
Atthistime,theGMRcancommunicatewithWinDiscovery,whichcandetectandidentifytheGMRthroughthe
exchangeofbroadcastmessages,evenwhenTCP/IPnetworkingparametersarenotconfiguredonthesame
network.
OncetheGMRhasavalidnetworkconfigurationandtheIPaddressoftheunitisknown,
itcanalsobeaccessed
andconfiguredviaSSHorTelnetbycomputersinthesamenetwork.
FRONTPANEL‘LED’STATUS
GMRmodelshaveLEDsonthefrontpaneltoshowstatus.
Theleft‐mostyellowLED(labeledPTPforPrecisionTimeProtocol,IEEE1588)flashesbrieflywitheveryPTPdelay
request(PTPisanoptionalfeature).
ThecenteryellowLED(labeled:NTPforNetworkTimeProtocol)flashesbrieflywithevery
NTPrequest.
Theright‐mostgreenLED(labeled:LockorSync)blinkstwicepersecondwhenthedeviceisnotlockedtoa
reference,andoncepersecondwhensyncedtoanexternalreferencesuchasGPS,PTP,TimeCode,asNTP.