What is GPSDO ?
GPSDO, Global Positioning System Disciplined Oscillator, receives GPS satellite signals and outputs accurate and precise time pulse and reference frequency by controlling its own oscillator with precise time reference from GPS. It is designed to get the best of both short-term frequency stability of a free-running, low noise oscillator and long-term timing performance received from GPS. The satellite signals can be trusted, because GPS satellites have high-performance atomic oscillator, and the accuracy is maintained from the ground stations. Moreover, it also provide an online pulse signal without being synchronized to another source and steered to compensate for aging and frequency drift by using GPS.

Product List of GPSDO (GNSSDO):

GNSS Disciplined Oscillators (GNSSDO) with Excellent Holdover Stability
product KStar 100 All-in-one ultra-stable OCXO based frequency and time standard Synchronize to built-in multi-system GNSS receiver.
Frequency accuracy ≤ ±1E-12 at GNSS locked.
Holdover stability ≤ ±1.5us over 24 hours in 20˚C temperature variation.
Dimension 158 x 190 x 53 mm.		 question
product KStar 100U Rack-mount ultra-stable OCXO based frequency and time standard Synchronize to built-in multi-system GNSS receiver.
Frequency accuracy ≤ ±1E-12 at GNSS locked.
Holdover stability ≤ ±1.5us over 24 hours in 20˚C temperature variation.
Dimension in 1U rack-mount.		 question
product KStar 100M-GNSS Ultra-stable OCXO based.
Ready for system integration in modular form factor.		 Synchronize to built-in multi-system GNSS receiver.
Frequency accuracy ≤ ±1E-12 at GNSS locked.
Holdover stability ≤ ±1.5us over 24 hours in 20˚C temperature variation.
Options available to programmable frequency output.
Dimension 95 x 46 x 20 mm.		 question
product KStar 100M-1PPS Ultra-stable OCXO based.
Flexible connection to any GNSS receiver by 1PPS input.		 Disciplined OCXO which synchronize to 1PPS external input.
Frequency accuracy ≤ ±1E-12 at GNSS locked.
Holdover stability ≤ ±1.5us over 24 hours in 20˚C temperature variation.
Dimension 75 x 46 x 20 mm.		 question
product KStar 50M-GNSS TCXO based.
Ready for system integration in modular form factor.		 Synchronize to built-in multi-system GNSS receiver.
Frequency accuracy ≤ ±1E-12 at GNSS locked.
Customized holdover stability upon user request.
Options available to programmable frequency output.
Dimension 75 x 46 x 8 mm.		 question
product KStar 50M-1PPS TCXO based.
Flexible connection to any GNSS receiver by 1PPS input.		 Disciplined TCXO which synchronize to 1PPS external input.
Frequency accuracy ≤ ±1E-12 at GNSS locked.
Customized holdover stability upon user request.
Dimension 55 x 46 x 8 mm.		 question
Options available for different combinations of holdover stability requirements such as 0.1us / 0.5us / 1us / 1.5us / 8us over 1 / 2 / 4 / 8 / 24 hours in 5˚C / 10˚C / 20˚C temperature variations. Please contact our sales representatives for details.
Please visit our website for more information of our products.
https://www.hongkongcrystal.com
Tel: 852-35112388