Performance SpecificaƟons (conꢀnued)
Principles of Operaꢀon
The following block diagrams depict the operaꢀon of the AR-51-07. The unit includes Rubidium Standard and accepts Input from internal
GPS receiver, external 1PPS or external TOD (H.Q). All outputs are derived from the internal Rubidium Clock, which is phase locked by a
digital PLL to the selected input. Thus, the Rubidium Clock - frequency and ꢀme - follows the GPS on the long term average. If GPS recepꢀon
is lost for short or long periods of ꢀme the Rubidium Clock shall maintain accurate ꢀme and frequency with no phase interrupꢀon.
Data flow & Inputs Selecꢀon
Rubidium-GPS D-PLL and Inputs
Typical Performance Plots
Typical ꢀme error fluctuaꢀons when disciplined to GPS
Typical ꢀme error in Holdover (without GPS)
Typical Performance Plots
Page 4 of 8
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