The pre-owned Agilent N7748A integrates four high-sensitivity optical channels into a single 1-U module, extending calibrated power measurements from –110 dBm up to +10 dBm across the 800-to-1700 nm window. Each port offers < 0.1 pW noise and < ±0.005 dB polarization ripple, ensuring sub-0.01 dB insertion-loss accuracy in filter, mux/demux or component test lines. Dual 1 M-sample buffers per port log data continuously at up to 25 µs resolution, while LAN, USB and GPIB interfaces plus SCPI compatibility let the meter slot straight into automated IL, drift or transient monitoring setups.

Refurbished units ship ISO-17025-calibrated with current firmware, trimming capital cost and rack space yet preserving Keysight reliability, sensor-free operation and long-term serviceability.

Contact TESTRO for a Fast Quote

Interested in an Agilent N7748A — 4-Port High-Sensitivity Optical Power Meter or a similar model?

• Drop your WhatsApp number or e-mail on our website and we will:

  
  

  • Send a tailored quotation and any current promotions.

  • Provide extra photos, test data, and full configuration details.

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

TESTRO Advantages

1. Laboratory-Verified Performance – Every unit ships with an ISO/IEC 17025 calibration certificate (TESTRO Certified) tied to its serial number.

2. Full Internal Transparency – High-resolution teardown photos plus a live video test (gain-linearity, noise-floor, spurious response); recordings are stored for the product’s lifetime.

3. Warranty & Technical Support – One-year warranty and weekday remote assistance from the in-house engineering team for both software and hardware issues.

4. Secure, Rapid Shipping – Aviation-grade flight case with triple-layer anti-vibration foam and shock/tilt indicators; priority DHL delivery in 3–5 days to major destinations.

5. Flexible Payment Options – Accepts T/T, wire transfer, credit card.

6. On-Site Inspection Welcome – Customers may visit the Shenzhen warehouse and refurbishment line to view calibration benches, burn-in racks, and inventory.

Founded in 2017 and headquartered in Shenzhen, TESTRO Electronics LLC focuses on the secondary sale and flexible rental of high-end electronic test instruments. The team counts 30 employees and operates a 1,500 m² warehouse and inspection center in Qianhai, Shenzhen.

Industry Background & Resource Sourcing

Over the past two decades, rapid advances in China’s radio-frequency sector have shortened production-line refresh cycles to roughly 3–5 years. Leveraging long-term partnerships with equipment OEMs, research institutes, and calibration labs, TESTRO acquires traceable, well-maintained decommissioned or replacement units. Every instrument undergoes a five-step technical check and third-party calibration before entering stock, ensuring reliable performance data.

Core Services & Delivery Process