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Timing Modules

Quartzlock provides Timing Modules for network timing, reference disciplining to various input references such as 1PPS, GPS receiver and Frequency References.

Digital Phase Lock Loop

Digital PLL DDS Clean-up Loop

1PPS Locking Modules

Module to control Rubidium Oscillator or OCXO from an external 1PPS output.

 Quartzlock Timing Modules for Network Timing
Quartzlock Timing Modules for Network Timing, A6-CPS, Digital Phase Lock Loop, PLL, Phase Lock, Rubidium, OCXO, GPS

A6-CPS Digital Phase Lock Loop

Thee A6-CPS digital phase locked loop (PLL) can be customised to a specific application and shipped ready for use in production.

To facilitate integration with your systems the A6-CPS can be shipped for customer configuration of adjustable parameters using the RS232 interface. When configuration is perfected, the parameters can be fixed in production by Quartzlock prior to shipping quantity requirements.

The A6-CPS digital PLL may be fitted into the Quartzlock A6 frequency convertor with BVA OCXO, rubidium, GPS or other options.

The customer has a choice of OCXO’s to fit onto or outside the A6-CPS digital PLL pcb. A customer specified A6-CPS Digital PLL may be smaller than the PCB pictured and fitted inside an OCXO sealed case.

Standard Specification:

    

 

  
Output Frequency 10 MHz
Number of Outputs 1
Phase Noise 1Hz 110 dBc
Phase Noise 10Hz 160 dBc
PSU Nominal 24V
PSU Min 14V
PSU Max 30V
Current 150mA
Supply DC
Quartzlock Timing Modules for Network Timing, A6-ANF, Active Noise Filter, Ultra Low Noise

A6-ANF Active Noise Filter

The A6-ANF Active Noise Filter has an Ultra Low Noise SC OCXO oven-controlled quartz oscillator which is used in Quartzlock’s Active Noise Filter Clean Technology to filter input reference signals. The A6-ANF provides an ultra low noise, very high short-term stability filtered output.

Standard Specification:

    

 

  
Output Frequency 10 MHz
Number of Outputs 1
Phase Noise 1Hz 110 dBc
Phase Noise 10Hz 160 dBc
PSU Nominal 24V
PSU Min 14V
PSU Max 30V
Current 150mA
Supply DC
Quartzlock Timing Modules for Network Timing, A6-1-PPS, Time tagging circuit

A6-1-PPS

The A6-1PPS uses a three-state Kalman filter algorithm to measure and correct the frequency offset of the oscillator with respect to the 1pps input.

Features:

  • A time tagging circuit which time tags the incoming 1pps with a resolution of 200ps, and an inherent jitter of < 1ns rms. The internal clock analogue interpolator is self calibrating.
  • An interface to the GPS receiver decodes messages and extracts relevant information, such as time correction data for the 1pps output.
  • A 1pps output which has the short term stability of the rubidium/ OCXO ( jitter <100ps RMS). This output may be steered into time coincidence with GPS time/UTC. Steering resolution is 1ns.
  • Holdover mode is initiated by failure of the 1pps input, or by reception of appropriate data from the GPS receiver that indicates that the 1pps is inaccurate. During holdover measured values of frequency offset and drift is used to steer the oscillator. The output 1pps will still be available.
  • A comprehensive computer interface that can be used to monitor the progress of the Kalman filter, and to set parameters for the type of oscillator to be controlled. communication with the GPS receiver is possible through the single interface. Operating parameters are stored in non volatile memory.

Standard Specification:

    

 

  
Output Frequency 1 Hz
1 PPS Outputs 1
Number of Outputs 1