12.03.2026  

After more than two decades on the market, Pendulum Instruments announces the immediate discontinuation of the GPS-12R/HS GPS-controlled Frequency Standards due to component obsolescence. 
Pendulum Instruments will continue to provide service support for up to five years, subject to the availability of spare parts. Availability may vary over time. 

Recommended Alternatives  

• FTR-210R – GNSSdisciplined Rubidium Frequency & Time Reference 
  https://pendulum-instruments.com/products/frequency-time-standards/ftr-210r/  

• 6688 / 6689 – High Stability Frequency Standards 
  https://pendulum-instruments.com/products/frequency-time-standards/6688-6689/  

• CNT-104R – Multichannel Rubidium Frequency Calibrator / Analyzer 
  https://pendulum-instruments.com/products/frequency-counters-analyzers/cnt-104r/