Agilent/Keysight 04395-61060 (4395A Option 1D5 Upgrade)

The Agilent/Keysight 04395-61060 is Option 1D5, a high-stability frequency reference upgrade for the 4395A Network/Spectrum/Impedance Analyzer. This option significantly enhances frequency accuracy and long-term stability, anchoring the analyzer's frequency-dependent measurements to a precision reference critical for demanding laboratory and production environments.

Technical Specifications

The 1D5 upgrade delivers exceptional frequency reference performance across operating conditions:

• Accuracy (0 °C to 40 °C, referenced to 23 °C): < ±0.13 ppm


• Initial Achievable Accuracy: < ±0.02 ppm


• Temperature Stability (0 °C to 40 °C, referenced to 23 °C): < ±0.01 ppm


• Aging Rate: < ±0.1 ppm/year The base 4395A analyzer operates from 10 Hz to 500 MHz with 1 mHz frequency resolution. Network analysis provides 115 dB dynamic range at 10 Hz IFBW, ±0.05 dB magnitude accuracy, and ±0.3 degrees phase accuracy. Spectrum analysis mode delivers -145 dBm/Hz sensitivity at 10 MHz with 1 Hz to 1 MHz resolution bandwidth in 1-3-10 steps, and noise sidebands below -100 dBc/Hz at 100 kHz offset from carriers. The synthesized source outputs -50 dBm to +15 dBm in 0.1 dB steps with ±0.8 dB level accuracy at 50 MHz and -20 dBm.

Key Features

• Reduces frequency reference drift under temperature variation


• Maintains accuracy over extended measurement sessions


• Compatible with vector network, spectrum, and optional impedance measurement modes


• GPIB and digital I/O interfaces for system integration


• Instrument BASIC (IBASIC) programming support


• VGA monitor output and 1.44 MB floppy disk storage (LIF or MS-DOS formats)

Typical Applications Precision frequency calibration, long-term network characterization, production testing requiring traceable frequency accuracy, and environmental chamber measurements where temperature stability is critical.

Compatibility & Integration Designed exclusively for the 4395A. Works alongside Option 010 (Impedance Measurement), Option 1D6 (Time-Gated Spectrum Analysis), Option 1D7 (50 Ω to 75 Ω Impedance Conversion), and Option 001 (DC Source ±40 V, 100 mA).