Timing Modules
Quartzlock provides Timing Modules for network timing, reference disciplining to various input references such as 1PPS, GPS receiver and Frequency References.
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product
Digital-Phase-Lock-Loop
The Quartzlock A6-CPS is a board level product designed for synchronising two stable oscillators. A typical example is the locking of a low phase noise OCXO to a rubidium frequency standard. The product uses a digital implementation of a standard phase lock loop.
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product
1pps-Locking-Modules
This is a module to control an OCXO or Rubidium oscillator with 1PPS from a GPS receiver. The Quartzlock A6-1PPS uses a 3 state Kalman filter algorithm to measure & correct the frequency offset of the oscillator with respect to the 1PPS input. Time-tagged input 1PPS to 200ps resolution & <1ns jitter. Analog interpolator is self calibrating. Interface to GPS decodes messages & extracts relevant info. i.e. time correction data for 1PPS output, this has AVAR of the Rb or OCXO i.e. 5 x 10-12/s & <100ps RMS jitter. The output is steered to time coincidence with GPS time/UTC to 1ns resolution. Holdover initiated by 1PPS fail or data from GPS RX that 1PPS is inaccurate. During holdover, measured frequency offset & drift steer the oscillator & 1PPS is still available.
