Agilent/Keysight 8709A

The Agilent/Keysight 8709A is a synchronizer and phase comparator that stabilizes source frequencies through phase-locking to a reference oscillator. It enables precise measurement and synchronization for signal and spectrum analysis applications in industrial and business environments. The instrument achieves frequency stabilization by comparing the phase of an input source against a stable reference, making it essential for maintaining coherent operation in broadband and solid-state systems where frequency drift cannot be tolerated.

Technical Specifications

• Functionality: Frequency stabilization via phase-locking architecture


• Primary application: Signal and spectrum analysis with synchronized measurement


• Dimensions: 8 x 7 x 10 inches


• Weight: 11 lbs


• Optional configuration: Option H10 provides enhanced phase-locking capabilities

Key Features

• Phase-locking synchronization to external reference oscillators


• Designed for precision frequency stabilization of broadband and solid-state signal sources


• Compact benchtop form factor for laboratory and field deployment


• Available with documented service and operating manuals for prefix serial numbers 741- and 837-

Typical Applications

• Frequency stabilization for HP BWO (backward-wave oscillator) systems


• Synchronization of solid-state microwave and RF sources


• Signal analysis requiring phase coherence between test sources and reference standards


• Precision measurement in spectrum analysis workflows

Compatibility & Integration The 8709A integrates with HP broadband and solid-state source families, providing external synchronization control. Connector types follow industry standard conventions consistent with Agilent/Keysight microwave test equipment. Complete operating and service documentation is available (Part Number 08709-90004) for supported serial number ranges.