Keysight Agilent HP 85650A

Keysight Agilent HP 85650A

Quasi-Peak Adapter

The Keysight Agilent HP 85650A is one of our refurbished Quasi-Peak Adapters.

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Keysight Agilent HP 85650A Features:

Frequency Band (MHz)

  • 0.01–0.15
  • 0.15–30
  • 30-1000

Bandwidth at 6 dB

  • 200 Hz
  • 9 kHz
  • 120 kHz

Charge TC (ms)

  • 45
  • 1
  • 1

Discharge TC (ms)

  • 500
  • 160
  • 550


The Keysight Agilent HP 85650A is a Quasi-Peak Adapter that can be attached to the spectrum analyzer to provide manual and automatic quasi-peak detection capability with the resolution bandwidth recommended by CISPR Publication 16 and FCC Rules and Regulations Volume II Part 15J.

The Keysight Agilent HP 85650A works with the 8566B, 8567A, and 8568B spectrum analyzers and it works with the 85685A RF preselector that will complete an EMI test receiver system. The quasi-peak adapter adds special bandwidth filters and quasi-peak detection capability. These bandwidth filters (200 Hz, 9 kHz, and 120 kHz) may be selected using the peak, quasi-peak, or the average detection.