MasterclockGMRUserManualv2–2016.12
11
StandardFeatures
Customconfigurationstomeetapplicationrequirements(seeOptionalFeatures)
NTPserver/clientfunctionalitywithselectableStratumidentificationlevels(1‐15)
NTPserveraccuracy:±2milliseconds
ServethousandsofNTPclientsonanetwork
SupportsNTPbroadcast,multicast,and/orunicast(query)modesofoperation
UTC
timeinternalreference
‐11.5to+12hourtimezoneoffsetsin30‐minuteincrements
Automaticdaylightsaving(US&Canadatimestandard)
HighStabilityTemperatureControlledCrystalOscillator(TCXO)maintainstimeduringlossofexternalsync
within±3seconds/year
Non‐volatilememoryconfiguration
Internal
RealTimeClock(RTC)backedbyamaintenance‐freerechargeablebatteryretainstimeduring
lossofpowerorlossofactivereference(s)forupto9monthswithholdoverstabilityof<165ms/day
FrontpanelLEDstatusindicators
R232(andRS422onGMR5000)serialportinterface
Kinemetrics/Truetime
output
NENA911PSAPmasterclockinput/output
NMEA0183ASCIIserialinput/output
ConfigurationandmonitoringviaWinDiscoverysoftwareorTelnet/SSH
USBserialportconfigurationinterface
Telnet/SSHinterfaceforalternateconfigurationandmaintenance
FullyconfigurablenetworksettingsviaDHCPorStaticIPaddressing
IPv4/IPv6
compatible
Passwordprotectionandauthenticatedcommunications
MD5authentication
SNMP(SimpleNetworkManagementProtocol)withcustomMIB
SMTP(SimpleMailTransferProtocol)
Firmwareupgradeability