Silicon Investigations Repair Service

  HP 4395A repair Service and software

Agilent, Keysight HP4395A Network/Impedance/Spectrum Analyzer

S.I. repairs the venerable Hewlett Packard (now Agilent, Keysight) 4395A Network, impedance and spectrum analyzers.

HP (Agilent, Keysight) 4395A Key Points:

The 4395A provides excellent vector network, spectrum, and optional impedance measurements for lab and production applications. Gain, phase, group delay, distortion, spurious, CN, and noise measurements often required for evaluating components and circuits can be measured using one instrument.

When combined with a test set, the 4395A provides reflection measurements, such as return loss, SWR, and S parameters. As a vector network analyzer, the 4395A operates from 10 Hz to 500 MHz with 1 mHz resolution; and its integrated synthesized source provides -50 to + 15 dBm of output power with 0.1 dB resolution. The dynamic magnitude and phase accuracy are +/-0.05 dB and +/-0.3 deg. so that it can accurately measure gain and group delay flatness, which are becoming more important in modern electronics systems.

As a spectrum analyzer, the 4395A operates from 10 Hz to 500 MHz with resolution bandwidths (RBWs) spanning 1 Hz to 1 MHz in a 1-3-10 steps. A fully-synthesized local oscillator allows stable and accurate frequency analysis. Direct A/D conversion (no LOG amplifier is used) results in +/-0.8 dB level accuracy (@50 MHz, -20 dBm). Noise sidebands fall below -100 dBc/Hz @ 100 kHz offset from carriers, while sensitivity is -145 dBm/Hz at 10 MHz.

These analyzers were notorious for having display problems and failed power supplies.  We stock refurbished display modules, power supplies, and all major boards and assemblies.

We also occasionally have complete refurbished units available for sale.  they are a great value for their capabilities.  The 4395A versions we sell for approximately $18,700 (depending on options and cosmetic condition) with warranty.  Please email us for availability.

Reference information for the HP 4395A:
HP 4395A Operation Manual
HP 4395A Programming Manual
HP 4395A Service Manual
HP 4395A Data Sheet
HP 4395A Overview
HP 4395A Configuration Manual

HP Application Notes:
Agilent, Keysight AN 346-2 Balanced Circuit Measurement
Using a Network Analyzer to Evaluate RFID Tags and Readers/Writers
Agilent, Keysight PN 4395-1 ADSL Copper Loop Measurements

Please see our shipping information page for packing and shipping of your valuable instrument: Shipping Cautions

Please call us at 920-955-3693 or email 


Last Modified May 2, 2017
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