MasterclockGMRUserManualv2–2016.12
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OptionalFeatures
YourGMRcanhavehardwaremoduleaccessoriesandmultipleadvancedfunctionoptions,installedupon
manufacture.ThesemaketheGMRanextremelyversatilenetworkdevicesuitableforalargevarietyof
applications.
GPS/GLONASS
• GPSorGPS/GLONASSreceiveroptionwithupto32‐channelreceiver,upto24satellites
• GPSReceiveraccuracy:±60nanosecond
• GPS/GLONASSReceiver:±25nanosecond
• PPSon‐timeoutputislockedtothetopofeachsecond(standardonGMR5000,optionalonGMR1000)
• NMEA‐
0183messagesonserialportoutput
HSO:HIGHSTABILITYOSCILLATORS
StandardTemperatureControlledCrystalOscillator(TCXO)
OptionalOvenControlledCrystalOscillator(OCXO)provideshighstabilitytimereferenceof±0.25sec/year
driftwhilefreewheelingafterdiscipliningfromaGPSorotheraccuratereference
OptionalRubidiumoscillatorprovideshighstabilitytimereference±1mS/yeardriftwhilefreewheelingafter
disciplining
fromaGPSorotheraccuratereference
Calibratestobest“active”timesource(useGPSorGPS/GLONASSoptionformaximumholdoverstability)
IEEE1588V2PRECISIONTIMEPROTOCOL
DefaultProfilePTPgrandmaster,slave,ortransparentclock
Peer‐to‐peerorend‐to‐endconfiguration
GrandMasterClockaccuracycomparedtotopofsecondofGPSreference:±100nanoseconds
SlaveclockaccuracycomparedtotopofsecondGrandMasterClockreference:±200nanoseconds
TCR:TIMECODEREADERMODULE
ReadsSMPTE24,25,30‐fpsnon‐dropframeandSMPTE29.97dropframe,IRIG‐B(AandEoptional)amplitude
modulatedandpulsewidthcoded(un‐modulated)
Automatictimecodedetectioncircuitwithautomaticgainadjust
Single‐endedunbalancedordifferentialbalancedinputs
DB9breakoutadapter
availablefordifferentialbalancedinput(GMR1000only,notneededonGMR5000)
Programmabledelayoffsetwith1µSresolution