Appendix A
Technical Specifications and
Operating Parameters
A.1 Scope
In this section you will find information relating to the functional and operational characteristics
of the standard Model 1084A/B/C Satellite Controlled Clocks. Topics included in this section
are Receiver Characteristics, I/O Configuration, System Interface(s), Antenna System, Operator
Interface(s), and Physical Specifications.
NOTE: Specifications are subject to change without notice.
A.2 Receiver Characteristics
A.2.1 Input Signal
• GPS L1 C/A code, 1575.42 MHz.
A.2.2 Timing Accuracy
• GPS/UTC time ±100 ns rms (at 1-PPS output), when receiving 4 or more satellites (one
satellite if position is known within 25 meters) in the presence of Selective Availability (SA).
• < 40 ns, typical in Position–Hold mode
A.2.3 Internal Oscillator, Stability
• Standard: DCXO, 1 ×10
−7
A.2.4 Allen Variance (locked to GPS, in Position–Hold Mode
• 1 second 5 ×10
−10
(2 × 10
−10
, typical)
• 1 day 5 × 10
−13
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