Spectratime GNSSource-2500

Spectratime GNSSource-2500

The GNSSource™ is a low-cost, high-performance primary GPS/GNSS rubidium reference standard in a compact 1U package. Get a Quote

GNSSource-2500 Overview

It integrates a low noise OCXO, a smart rubidium clock, and a GPS/GNSS receiver. It also uses the patented GPS/GNSS SmarTiming+® technology, disciplining the Rb clock with an auto-adaptive loop time constant of 1,000 to 100,000 seconds, depending on the GPS/GNSS signal quality, at cutting-edge 1ns resolution.


  • Low noise GPS/GNSS rudidium atomic clock standard for cross-industry applications
  • Low noise GPS/GNSS Rb atomic clock reference for high-precision lab instruments
  • Low noise GPS/GNSS Rb atomic clock standard for scientific & lab projects
  • Low noise GPS/GNSS Rb atomic clock reference for mobile & radio network timing analyzers
  • Low noise GPS/GNSS Rb atomic clock for noise sensitive time & frequency systems
Key Features:
  • Weight 4 Kg |8.82 lbs
  • Size (WxHxL) 445x300x44mm (1U) | 17.51x11.81x1.73"
  • Warm-up time @ 25°C 15 min, 5E-10
  • Holdover < 1µs/24hr*, < 7µs/week* *temp profile +2°C
  • Accuracy @ shipment typ. < 5x11 at 25c

Support and Documentation

iReference+ Smart GNSSource-2500 Spec
pdf (344KB)
iReference+ Smart RBSource-1500 / GNSSource-2500 Manual
pdf (2,318KB)
GNSS LEA-6T and LEA-M8T in iSync devices
pdf (891KB)

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