Agilent / Keysight E4404B 6.7 GHz ESA-E Spectrum Analyzer

The Agilent/Keysight E4404B is a 6.7 GHz spectrum analyzer engineered for signal analysis, RF component characterization, and wireless communication system testing. Operating from 9 kHz to 6.7 GHz, it delivers a typical DANL of -160 dBm at 1 GHz and amplitude accuracy of ±1 dB across dynamic range measurements. The instrument provides resolution bandwidths from 1 Hz to 3 MHz and video bandwidths from 0.1 Hz to 1 MHz, each with ±5% accuracy.

Phase noise performance reaches -100 dBc/Hz typical at 1 GHz with 10 kHz offset.

Technical Specifications

• Frequency range: 9 kHz to 6.7 GHz


• Resolution bandwidth: 1 Hz to 3 MHz (±5% accuracy)


• Video bandwidth: 0.1 Hz to 1 MHz (±5% accuracy)


• Display average noise level (DANL) at 1 GHz: -160 dBm typical


• Third-order intercept (TOI) at 1 GHz: +13 dBm typical


• Amplitude accuracy: ±1 dB


• Logarithmic display: 0.01 dB/div to 200 dB/div


• Frequency accuracy: ±1 ppm with 10 MHz reference


• Sweep time: 10 ms to 500 s


• Phase noise: -100 dBc/Hz typical (1 GHz, 10 kHz offset)


• Power consumption: 150 VA typical (100-240 VAC, 50/60 Hz)


• Warm-up time: 5 minutes (initial), 30 minutes (full accuracy)


• RF input: Type N connector, 50 Ohm


• External reference: BNC, 1 M Ohm


• Dimensions: 177 mm H × 426 mm W × 485 mm D


• Weight: 16.7 kg


• Display: Color LCD

Key Features

• Built-in measurement functions including channel power, adjacent channel power (ACP), occupied bandwidth, harmonic distortion, and AM/FM demodulation


• Amplitude display in dBm, dBW, W, V, mV, and dBmV


• GPIB (IEEE-488.2) and optional LAN (Ethernet) interfaces for remote control and data transfer


• Optional tracking generator for swept frequency measurements

Typical Applications

• Wireless communication system testing and troubleshooting


• RF component characterization and signal quality evaluation


• Laboratory and field-based spectrum measurement

Compatibility & Integration The E4404B integrates with Agilent/Keysight VSA (Vector Signal Analysis) software and third-party analysis tools via standard GPIB, Ethernet, and USB interfaces. It maintains compatibility across the ESA series analyzer ecosystem.