Specifications

Masterclock, Inc.

phone(USAandCanada):1‐800‐940‐2248|phone(international):+1‐636‐724‐3666
email:[e-mail]|online:www.masterclock.com






KeyFeatures
• AddtoMCR1000orMCR5000
• Availableinthreeprecision
gradelevels(seechart)
• Typicalholdoverstability of
1ppb/day,orbetterwithOCXO
• Optional10MHzfrequencyreferenceoutput
• Lockstomostaccuratetimesource(GPS
Receiver,TimeCodeReader,NTPClient)
• Optional10MHzreferenceoutput


Masterclock’sMCR‐HSO(HighStabilityOscillator)is
anadd‐inmoduleformasterclockreferencedevices.
Itprovidesprecisiontimeandfrequencyforawide
rangeofapplications.Affordablepriceandflexible
orderoptionsmakethisapopularadd‐informeeting
criticaltimekeepingduring
holdover(lossofprimary
referencesuchasGPS),aswellasforspecialized
applicationsrequiringaprecisefrequencyreference.
TheHSOcrystaloscillator(OCVCXO)maintains
excellentholdoverstabilityofupto1msday.For
timeandfrequencycriticalapplicationsthe

rubidiumatomicoptioncanprovide atimestability
of
betterthan1msperyearwithfrequencystability
ofupto1x10
‐12
.
WhennottiedtoGPS,aprecisionfrequency10MHz
referenceoutputisavailableasasourcefor
laboratoryuseorforanRFreference,including
cellularapplications.TheMCR‐HSOoptionis
requiredforall10MHzsignaloutputs.
WhenlockedtoGPS,theOCXO10MHzsinewave
frequency
willhavethesamelong‐termstabilityas
anatomicclock.

 
Freq=10.000000MHz
1
AvailableinMCR‐1000
andMCR‐5000
2
AvailableinMCR‐1000
andMCR‐5000
COMINGSOON
AvailableinMCR‐5000only
OscillatorType VCTXO OCVCXO RubidiumAtomic
Level(dBm)@50Ohms 7dBm±2dBm 7dBm±1dBm 7dBm±1dBm
FreqStability‐Aging/day TBD (1x10E‐9) (4x10E‐11)
FreqStability‐Aging/year
±1ppm/year
(1x10E
‐6
)
±0.3ppm/year
(3x10E
‐7
)
±0.0015ppm/year
(1.5x10E
‐9
)
ShortTermStability
(AllanVariance)1secgate
TBD
≤1.0e
‐10
 ≤5.0e
‐11

TimeDriftperYear(max) ±3sec ±.0.3sec ±1.5ms
Note1

OptionalOutputs–
(10MHzOutputOption)
1
(clippedsinewave)
1
Sinewave
1
Sinewave
PhaseNoise
(dBc/Hz)@10MHz
1Hz NA
<‐85dBc/Hz <‐65dBc/Hz
10Hz NA <‐115dBc/Hz <‐85dBc/Hz
100Hz NA <‐140dBc/Hz <‐112dBc/Hz
1kHz NA <‐150dBc/Hz <‐130dBc/Hz
10kHz NA <‐155dBc/Hz <‐140dBc/Hz
Master Clock Upgrade
s
MCR-HSO Module Options
MCR‐HSOModule
MCR5000
MCR1000