iTest+® clock instruments

FemtoStepper

Femtosecond Clock Synthesizer (FemtoStepper)

The FemtoStepper™ is a high-performance, high-resolution phase & frequency synthesizer. It features an advanced < 100 fs resolution step to control and adjust the output drift of a primary reference clock or standard, such as an active hydrogen maser clock, without changing its behavior. The drift can be automatically compensated through the AutoDrift feature. It is designed for clock ensemble modeling and time & frequency generation from a clock ensemble system. Applications include time generation systems for metrology labs, GNSS satellite navigation systems, and time generation systems for GNSS ground primary time facilities to name a few.


RELATED PRODUCTS: See our product brochure to quickly compare other product features and performance.

Key Features*

*See or download the full Spec in the Documents page. 

Specifications Standard Options
Input
Ouput
10 MHz
4x 10 MHz, 4x 1PPS

4x 5 MHz
Tempco (input vs output)
Temp
≤20ps⁄C
20 to 30C
 
Stability (ADEV)
1s
10s
100s
1 ks
10 ks

3E-13

4E-14
7E-15
4E-15
2E-15
Phase noise (10 MHz)
1 Hz
10 Hz
100 Hz
1 kHz
10 kHz
100 kHz
(dBc/Hz)
-90
-110
-130
-140
-150
-150

-100

-125
-140
-150
-155
-160
Resolution
-Relative freq offset
-Phase step (10MHz out)
-Phase offset vs. outputs

1E-17
100fs | 0.1ps
≤10ns
Power (operating)
Voltage
< 40w after warm-up > 85-264VAC or22-28VDC  
Size (WxHxL) 445x300x88mm (2U) | 17.51x11.81x3.46"
Weight 6 Kg | 211.64 lbs

Applications

It is typically used in the following applications:

  • Clock ensemble/drift modeling systems
  • Time & frequency generation from clock ensembling systems
  • Time scale for metrology lab systems
  • GNSS navigational systems
  • Time generation system for GNSS ground time monitoring facilities

Documents

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