Phase Lock (PLO)

Phase Lock Crystal Oscillators are widely employed in commercial and military applications requiring a precise signal synchronized with a more stable external reference and/or improved phase noise performance. Wenzel Associates’ phase lock oscillators consist of an oven compensated low or ultra-low phase noise crystal oscillator, comparator, loop amplifier and dividers/multipliers for scaling the reference and internal oscillator signals for locking at a common frequency. When a reference is present, the comparator will produce an error voltage which is applied to the varactor of the internal oscillator, and will electrically tune the oscillator until the frequency is matched and phase locked with the reference. Wenzel offers PLO solutions with output frequencies from 5 MHz to 12 GHz. Please contact our technical staff to discuss your specific application needs.
Model Description Application Phase Noise (100 kHz) Size
Standard HF PLO (1)
Standard HF PLO
  • Phase Noise Clean-Up Oscillator
  • Frequencies 5 MHz to 25 MHz, fixed
  • Low Phase Noise
  • Solder Sealed Steel Can with Mounting Flange
  • SMA(f) and Solder Pins on Side
  • Output: Sine, +13 dBm
  • Automatic Input Detection
  • Low Loop Bandwidth: ≤ 0.1 Hz, typical
Up/Down Converters
GPS Receivers
System Synchronization
Test Equipment
-165 dBc/Hz 2.94 x 2.25 x 0.6"
Model Description Application Phase Noise (100 kHz) Size
Premium HF PLO
Premium HF PLO
  • Frequencies 5 MHz to 25 MHz, fixed
  • Ultra Low Phase Noise
  • Ruggedized for Dynamic Environments
  • Nickel-Plated Machined Aluminum Case
  • SMA(f) and Solder Pins on Side
  • Output: Sine, +13 dBm, Standard
  • Automatic Input Detection
  • Low Loop Bandwidth: ≤ 1 Hz, typical
  • Dual Output Option
  • Configured for use with Vibration Isolators
Up/Down Converters
GPS Receivers
System Synchronization
Test Equipment
Radar Systems
-174 dBc/Hz 3.5 x 2.5 x 0.8"
Model Description Application Phase Noise (100 kHz) Size
HF Citrine PLO
HF Citrine PLO
  • Frequencies 5 MHz to 25 MHz, fixed
  • Standard and Premium Phase Noise
  • Ruggedized for Dynamic Environments
  • Nickel-Plated Machined Aluminum Case
  • SMA(f) and Solder Pins on Side
  • Optional Voltage Reference and Oven Monitor Pins
  • Output: Sine, +13 dBm, Standard
  • Automatic Input Detection
  • Low Loop Bandwidth: ≤ 1 Hz,typical
  • Low G-Sensitivity to 1E-10/g per axis
  • Excellent Temperature Stability, Free-Running
  • Low Aging rate
  • Vibration Isolated Version Available
Airborne
Radar Systems
Tacticle Radio
Vehicular Communication
System Synchronization
-165 dBc/Hz (Standard)
-174 dBc/Hz (Premium)
2.25 x 2.25 x 1.3"
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