Specifications
Feature:Standard
Drift rate:21 milliseconds/day typical after having been locked to a stable reference for at least
30 minutes. (Assumes less than 5°C temperature change over this time period).
Oven Controlled Crystal Oscillator (OCXO)
Feature:Option
Drift Rate:1 millisecond/day typical after having been locked to a stable reference for at least 1
hour. (Assumes less than 5°C temperature change over this time period).
Rubidium Oscillator
Feature:Option
Drift Rate:6 microseconds/day typical for a Model S250 and 25 microseconds/day typical for a
Model S200 after having been locked to a stable reference for at least 1 hour. (Assumes less
than 5°C temperature change over this time period).
Accuracy & Stability
Synchronization
Source
Timing Accuracy
to Reference Comments
GPS, 4 or more satellites
tracked
50 nS RMS, 150 nS
peak
GPS, 1 satellite tracked,
position known within 200m
1 uS peak Position from satellite fix or entered by the
user.
NTP Client Mode, Local
server
2 mS peak Local server on same subnet.
IRIG-B 10 uS peak Relative to input signal.
1PPS 100 nS peak Relative to input signal.
The stability of the 1PPS, 10MHz, and IRIG-B outputs depend on the optional oscillator
installed.
GPS Receiver
Description:The internal GPS Receiver is the preferred reference for the SyncServer's Hard-
ware Clock. The GPS receiver must be connected to a 12-VDC capable antenna using the
GPS
Ant
connector.
Note: The GPS receiver is only available in the S200 and S250 models.
Connector:
GPS Ant, BNC female, 12 VDC antenna power feed, detects Open and
Short circuits.
Page 86..........................................................................997-01520-02 Rev. G2
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