SST2

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SST2 Series     SATELLITE SYNCHRONIZED TIME    NTP STRATUM 1

The SST2 NTP server provides UTC (Coordinated Universal Time) to IT and Telecommunication Systems. This information is generated by the U.S. Naval Observatory and retransmitted by GPS satellites. Up to 12 satellites are tracked simultaneously. All pertinent data are stored in solid state memory providing a history log in excess of nine years. In addition to accurate time, a 10 MegaHertz sine wave reference frequency and a one-pulse-second square wave are provided as outputs at the rear panel. Time queries are managed by the main processor board CPU and frequency output (10 MHz and 1PPS) is managed by two additional dedicated processors.  A TrimbleTM BulletTM active antenna with 75 feet of quad insulated RG6 cable is provided with each unit.  The embedded 12 channel receiver is the highly rated TrimbleTM Resolution-TTM. The SST2 is housed 1.75”(1U) high X 10.5”deep X 17” wide with removable 19” rack-mount ears.

Nine front panel LEDs provide instant status of power conditions and activity. A two-line by 24 character display gives additional dynamic information. SST2 servers are more accurate that unit costing hundreds more. Made in the U.S.A.

SST2

 

FRONT PANEL LEDs

Main Power                               1 PPS activity
Processor Power                       GPS data activity
GPS Receiver Power                 High Spec accuracy active
Memory access activity            Locked to satellite(s)
Antenna good

DISPLAY

UTC (hh:mm:ss) (mm:dd:yyyy)                   Number of active users
Compensation offset (ppb corrected)       Time offset from U.S Naval Observatory

REAR PANEL

RS232 to main processor
RS232 pass thru to GPS receiver, Trimble TSIP protocol
10 MHz reference frequency output, BNC 50 ohms, 1 vpp min.
1 PPS output, BNC, 50 ohms, 1 vpp min.
RJ-45, 10/100 Base-T socket
Monitor output D Type (15 pin)
Antenna input, F type
Keyboard input
Two USB ports

ACCURACY

UTC                                 <5E – 11 @ 1 second: <1E – 13 @ 500 seconds
Allan Deviation               <1E-10 @ 1 second
Holdover                          ITU/ANSI 3

ELECTRICAL

100 – 240 Volts AC, 50/60 Hertz, <10 watts

SST2 TIMING CHARACTERISTICS