Agilent/Keysight E4405B

The Agilent/Keysight E4405B is a spectrum analyzer delivering precise frequency domain measurements from 9 kHz to 13.2 GHz. Part of the ESA-E Series, it balances performance and economy for engineers and system integrators conducting signal analysis, troubleshooting, and validation across RF and microwave applications. The instrument supports DC-coupled operation across its full range, with AC-coupled capability (Option UKB) from 100 kHz to 13.2 GHz. Three measurement bands enable flexible coverage: Band 1 spans 9 kHz to 3.0 GHz, Band 2 covers 2.85 GHz to 6.7 GHz, and Band 3 extends to 13.2 GHz.

– Technical Specifications

Frequency accuracy is ±(frequency indication × frequency reference error + span accuracy + 15% of RBW + 10 Hz + 1 Hz × N). The marker frequency counter achieves ±(marker frequency × frequency reference error + counter resolution) with selectable resolution from 1 Hz to 100 kHz. Frequency span ranges from 0 Hz (zero span) to the full analyzer range, with span accuracy of ±0.5% across 8192 sweep points.

Amplitude performance includes overall accuracy of ±0.4 dB. With internal preamp enabled, displayed average noise level (DANL) reaches -167 dBm. Third-order intermodulation distortion (TOI) is +12.5 dBm from 100 MHz to 3.0 GHz and +11 dBm above 3.0 GHz. Maximum safe input level at ≥5 dB attenuation is +30 dBm (1 W), with peak pulse power capability of +50 dBm (100 W). Residual responses remain below –90 dBm from 150 kHz to 6.7 GHz.

Frequency reference stability (Option 1D5) provides aging of ±2 × 10⁻⁶/year, temperature stability of ±5 × 10⁻⁶ across 20 to 30 °C, and settability of ±5 × 10⁻⁷. An amplitude reference output of –20 dBm nominal at 50 MHz supports external calibration workflows.

– Key Features

• Nine decade frequency coverage with multiple measurement bands
• Selectable frequency counter resolution for precise marker analysis
• Zero-span capability for time-domain signal observation
• Wide dynamic range and low noise floor for weak signal detection
• High-power input tolerance for robust field and manufacturing environments

– Typical Applications

Component characterization, transmitter validation, interference identification, and in-service equipment diagnostics across development, manufacturing, and field service.

– Compatibility & Integration

Internal preamp option and external amplitude reference output enable integration into automated measurement systems and calibration setups.