The Agilent/Keysight N4391B is a critical instrument for research and development in optical communication, enabling engineers to analyze and optimize complex optical signals. It features a wide bandwidth, high sampling rate, and advanced signal processing capabilities. This modulation analyzer is essential for ensuring the performance and reliability of high-speed optical networks.
Agilent/Keysight N4391B Optical Modulation Analyzer
- Repair Support & OEM Spare Parts
- University and Research Discounts
- 100% Verified & Tested Equipment
- Rental Units Available
The Agilent/Keysight N4391B is a high-performance optical modulation analyzer designed for characterizing advanced modulation formats in optical communication systems. It provides accurate and reliable measurements of signal quality, including error vector magnitude (EVM), and supports various modulation formats such as QPSK, QAM, and OFDM.
$301,550.00
In stock
In stock

FedEx, UPS, USPS
Shipping world-wide available:
DHS, FedEx International
Product Condition & Availability
Agilent/Keysight N4391B Optical Modulation Analyzer is in excellent working condition and has been thoroughly tested for performance and reliability. We offer both new and professionally refurbished options, depending on availability and customer preference.
Integrated Solutions & Deployment Support
Beyond individual products, Aumictech provides end-to-end solutions for manufacturing line deployment and test station setup. Our team can assist with system integration, configuration, and equipment selection tailored to your production requirements.
Trusted Industry Experience
With over a decade of experience, Aumictech is a recognized leader in RF and optical test equipment sales and services. All units are supported by our in-house calibration and repair facility based in Downingtown, PA, ensuring technical reliability and long-term value.
Customer Commitment
We’re committed to exceptional customer service, offering a 15-day return or replacement (ROR) policy for peace of mind. Our team is always available to assist with pre- and post-sale support.
Fast Shipping & Flexible Payments
We offer rapid global shipping through FedEx, UPS, and DHL, with most orders dispatched within 1–3 business days. Multiple secure payment options are available, including PayPal, ACH, wire transfers, and major credit cards.


























Reviews
There are no reviews yet.