Series PCRO
Series PCRO

Phase Locked Coaxial Resonator Oscillators

CAES' series of phase locked coaxial resonator oscillators has been designed for use in commercial and military systems where demanding performance, high reliability and cost are critical.

This family of products take advantage of low phase noise transistors and a metalized high Q coaxial resonator. When phase locked to an external crystal reference, the low noise characteristics of the high Q resonator are enhanced by the long term stability of the external reference.

The series PCRO can be custom configured to meet the demanding electrical performance and environmental requirements for military airborne, radar and communications applications.

Features such as low phase noise, high power, small size and low cost make CAES' PCRO product line the best value on the market today.

Contact the factory to discuss your special requirements.

Key Tech Specs
Typical Performance Specifications
  • Fixed frequencies from 300 MHz to 3 GHz
  • Output power +15 dBm standard
  • Power variation ±2 dBm
  • Output impedance 50 ohms
  • Load VSWR 1.5:1
  • Output impedance 50 ohms
  • Spurious -80 dBc
  • Harmonics -20 dBc
  • Lock alarm TTL high when locked
  • Input reference frequency 5 MHz to 100 MHz for single loop models, 1 MHz to 100 MHz for dual loop models
  • Input reference power level 0 ± 3 dBm
  • Internal reference models frequency stability ±2.5 ppm standard, ±1 ppm optional
  • External reference models frequency


Power, Dimensions and Environmental
  • Supply voltage +12V, +15 V and 8 VDC on select models
  • Current 300 mA for external reference models, 450 mA steady state, 800 mA surge on internal reference models, 450 mA for dual loop models
  • Operating temperature -30˚ to 70˚ centigrade
  • Storage temperature -54˚ to +85˚ centigrade
  • Frequencies from 300 MHz to 3 GHz
  • Wide operating temperature
  • Ultra low phase noise
  • Low power consumption
  • Phase lockable to references from 1 MHz to 100 MHz
  • Low Spurious
  • Low loss high Q circuit


  • High stability internal reference
  • Field replaceable connectors
  • Hermetic seal
  • Extended temperature ranges
  • Dual loop models

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