Here’s the page we think you wanted. See search results instead:


Contact an Expert

N4985A System Amplifiers

Sold By:


Prices for: United States

* Prices are subject to change without notice. Prices shown are Manufacturer's Suggested Retail Prices (MSRP). Prices shown are exclusive of taxes.

Key Features & Specifications

  • N4985A-P15 operates from 10 MHz to 50 GHz
  • N4985A-P25 operates from 2 to 50 GHz
  • N4985A-S30 operates from 100 kHz to 30 GHz
  • N4985A-S50 operates from 100 kHz to 50 GHz
  • N4985A-OA3 Optical Application Tuning for Option S30
  • N4985A-OA5 Optical Application Tuning for Option S50
  • High gain
  • Compact size


The Keysight Technologies N4985A series system amplifiers are high performance broadband amplifiers with excellent power and gain from 100 kHz to 50 GHz. The amplifiers are self-contained and plug into standard AC power sources.


  • Bench-top lab work
  • Production line testing
  • Frequency/time domain applications
  • Saturated RF amplifier testing
  • Drive TWT amplifiers
  • Antenna system amplification