The pre-owned Agilent E4404B ESA-E brings reliable 9 kHz–6.7 GHz coverage to service benches and production lines in a single 4-U chassis. Its standard 1 kHz–5 MHz RBWs (expandable to 100 Hz with option 1DR) and –101 dBc/Hz phase-noise floor let engineers separate closely spaced carriers, while the internal pre-amplifier pushes DANL to –167 dBm/Hz—quiet enough to “hear a pin drop” in RF terms. SCPI/IVI control, optional measurement personalities, and LAN/GPIB interfaces keep automation simple.

Buying refurbished cuts capital expense and lead-time; units can ship ISO-17025-calibrated with the latest firmware, preserving Agilent precision and long-term serviceability.

Contact Us for a Fast Quote

Interested in an Agilent E4404B — 6.7 GHz Portable ESA-E Spectrum Analyzer Spectrum Analyzer or a similar model?

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Looking for other models? Our inventory changes daily—ask for the latest list of spectrum analyzers and RF equipment.

Why Choose TESTRO?

1. Laboratory-Verified Performance

   Every unit ships with an ISO/IEC 17025 calibration certificate bearing the TESTRO Certified seal, so you know the specifications are not just claimed—they’re proven.

2. Total Transparency

   High-resolution teardown photos and a live video test session let you inspect seals, modules, and real-time performance metrics before you pay.

3. Real Warranty, Real People

   One-year machine warranty, with our engineering team standing by on business days to provide remote assistance for any software or hardware issues.

4. Global Delivery, Built-In Protection

   DHL lanes—arriving at most destinations in just 3–5 days.

5. Flexible, Modern Payments

   Choose traditional T/T or wire transfer, credit card.

6. Open-Door Assurance

   Visit our Shenzhen facility, walk the refurbishment line, and see your equipment on the bench before it leaves our dock.