Agilent / Keysight E4408B 26.5GHz ESA-L Spectrum Analyzer

The Agilent/Keysight E4408B ESA-L is a 26.5 GHz spectrum analyzer engineered for signal analysis across R&D, manufacturing, and field service environments. Operating from 9 kHz to 26.5 GHz, this instrument delivers ±1.1 dB amplitude accuracy, 82 dB third-order dynamic range, and displayed average noise level of -116 dBm at 1 GHz. The analyzer captures fast measurement updates at ≥28 spectra per second with sweep times from 4 ms to 4000 s and achieves ±2 kHz frequency accuracy after a 5-minute warm-up.

Technical Specifications

• Frequency Range: 9 kHz to 26.5 GHz


• Amplitude Accuracy: ±1.1 dB overall


• Resolution Bandwidth: 100 Hz to 5 MHz; optional 100 Hz to 300 Hz minimum 1 kHz


• Displayed Average Noise Level: -116 dBm (at 1 GHz)


• Third-Order Intercept: +7.5 dBm


• Dynamic Range: 82 dB third-order, 78 dB second-order (at 1 GHz)


• Phase Noise: -90 to -95 dBc/Hz at 10 kHz offset; -78 to -79 dBc/Hz with Option 1DR


• Frequency Accuracy: ±2 kHz


• Sweep Time: 4 ms to 4000 s


• Measurement Rate: ≥28 updates/sec


• Warm-up Time: 5 minutes


• Input Attenuation: 0–75 dB


• Maximum Input (Continuous): +30 dBm (1 W)


• Maximum Input (Peak Pulse): +50 dBm (100 W)

Key Features

• Color, high-resolution display for field and lab environments


• PowerSuite one-button power measurement capability


• SCPI-compliant programming with IVI COM driver support


• 8590 series code compatibility for legacy system integration


• Portable, ruggedized design with snap-on battery pack option


• Safety Class 1 construction with protective earthing ground

Typical Applications

• Component and subsystem characterization


• Manufacturing test and validation


• Field service and troubleshooting


• Signal surveillance across microwave and millimeter-wave bands

Compatibility & Integration GPIB and SCPI programming interfaces enable remote operation and automation. IVI COM driver support simplifies integration into test systems.