Agilent / Keysight E4440A 26.5GHz PSA Spectrum Analyzer

The Agilent/Keysight E4440A is a 26.5 GHz PSA Spectrum Analyzer engineered for signal analysis in aerospace, defense, and wireless communications. This instrument delivers precise measurements across 3 Hz to 26.5 GHz (DC coupled) or 20 MHz to 26.5 GHz (AC coupled), with frequency coverage extendable to 110 GHz using Agilent external mixers or 325 GHz with third-party mixers. The analyzer combines fast sweep capabilities, flexible triggering options, and multiple resolution bandwidth settings to support demanding measurement tasks from component characterization to system-level RF analysis.

Technical Specifications

• Frequency range: 3 Hz to 26.5 GHz (DC coupled); 20 MHz to 26.5 GHz (AC coupled)


• External mixer extension: up to 110 GHz (Agilent); up to 325 GHz (third-party)


• Frequency reference aging: ±1 × 10⁻⁷ per year


• Frequency reference temperature stability: ±1 × 10⁻⁸ (20–30 °C); ±5 × 10⁻⁸ (0–55 °C)


• Counter resolution: 0.001 Hz


• Marker frequency counter accuracy: ±(marker frequency × frequency reference accuracy + 0.100 Hz) Span and Sweep


• Frequency span: 0 Hz (zero span) to instrument maximum; 2 Hz resolution


• Sweep time: 1 µs to 6000 s (zero span); 2 ms to 2000 s (span ≥ 10 Hz)


• Sweep points: 2 to 8192 (zero span); 101 to 8192 (span ≥ 10 Hz)


• Trigger delay: –150 ms to +500 ms (zero span/FFT); 1 µs to 500 ms (swept)


• Gated sweep: 10 µs to 500 ms gate length; 0 to 500 ms gate delay; 33.3 ns p-p jitter nominal


• Sweep triggering modes: free run, line, video, RF burst, external front, external rear, frame (basic mode) Resolution and Selectivity


• Resolution bandwidth: 1 Hz to 3 MHz (10% steps), plus 4, 5, 6, 8 MHz


• RBW accuracy: ±0.5% to ±1.5% depending on bandwidth range


• Selectivity (–60 dB/–3 dB): 4.1:1 nominal


• EMI bandwidths: CISPR (200 Hz, 9 kHz, 120 kHz, 1 MHz); MIL STD 461E (10 Hz, 100 Hz, 1 kHz, 10 kHz, 100 kHz, 1 MHz)

Key Features

• Zero-span mode for time-domain RF burst analysis


• Gated FFT with ±150 to +500 ms delay range and 100 ns resolution


• Frequency span accuracy to ±(0.2% × span + span / (sweep points – 1))


• Dual-coupled input (AC/DC) for broadband and narrowband measurements


• Multiple trigger options including video, RF burst, and external synchronization

Typical Applications

• Aerospace and defense signal characterization


• Wireless communication system validation


• EMI/RFI pre-compliance testing


• Component and subassembly RF performance verification


• Time-domain burst and modulation analysis

Compatibility & Integration The E4440A integrates with Agilent external mixers for operation to 110 GHz and supports third-party mixer extension to 325 GHz. Front and rear external trigger connections enable synchronization with automated test systems.