Agilent N993X Series Spectrum Analyzer

Product Introduction.

This series consists of specialized configuration models of the FieldFox handheld analyzers. Unlike the standard N991x series, the N993x series are pre-configured packages with specific software and hardware, typically optimized for particular application scenarios (such as interference analysis or millimeter-wave extensions), designed to provide users with an "out-of-the-box" solution.

Agilent (Keysight) FieldFox N993xA Series - Product Introduction

The N993x series are special editions based on the FieldFox platform. They share the core advantages of FieldFox (rugged, portable, versatile) but focus on addressing more complex field measurement challenges through pre-installed advanced options and specific configurations.

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I. Series Overview and Common Features

All N993xA models possess the universal benefits of FieldFox:
Rugged and Portable: Compliant with MIL-PRF-28800F standards, IP53 protection rating, built-in battery.
Versatile Platform: Based on SA, VNA, and CAT modes.
Touchscreen Operation: Intuitive user experience.
Out-of-the-Box Solution: Pre-installed with expensive professional options, eliminating the hassle of separate purchases and activations.

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II. Detailed Differences Between Models and Selection Guide

The core differences among these models lie in their pre-installed specialized software options and target applications.

| Model | Frequency Range (Typical) | Core Features and Pre-installed Options | Target Applications |
| :--- | :--- | :--- | :--- |
| N9935A | Typically 4 GHz or 6 GHz | Interference and Spectrum Analyzer (ISA). This is FieldFox's dedicated machine for interference analysis. It comes pre-installed with Real-Time Spectrum Analysis (RTSA) and advanced Interference Analysis (ITA) software. Equipped with powerful features like Spectrogram and Probability of Interference (PoI), it can capture and analyze complex signals such as transients and frequency-hopping. | Professional wireless interference troubleshooting. A tool for spectrum management agencies, network optimization engineers, and public safety communication maintenance personnel to locate and characterize unknown interference sources. |
| N9936A | Typically 4 GHz or 6 GHz | High-end comprehensive analyzer. This model is usually the "fully equipped" version with almost all key options pre-installed. It typically includes: Vector Network Analysis (VNA), Cable and Antenna Analysis (CAT), Spectrum Analysis (SA) + Preamplifier (Preamp) + Power Meter + Advanced Calibration Kit Support, etc. | All-in-one field maintenance. Designed for users requiring comprehensive functionality, such as large base station maintenance teams and integrators, with no need for additional option purchases. |
| N9937A | Up to 14 GHz | High-frequency comprehensive analyzer. This model is a pre-configured version for higher frequency applications, typically extending the frequency range up to 14 GHz and pre-installing core modes like VNA, CAT, SA, and possibly a preamplifier. | Microwave link and satellite communication maintenance. Used for installing and maintaining point-to-point microwave relays, satellite communication equipment (e.g., C-band, Ku-band), and other applications requiring higher frequency ranges. |
| N9938A | Up to 26.5 GHz | Millimeter-wave comprehensive analyzer. This is the flagship pre-configured version of the FieldFox series for millimeter-wave applications. It extends the frequency range to 26.5 GHz and comes pre-installed with all necessary modes and options (e.g., VNA, SA, Preamp) to support millimeter-wave measurements such as Ka-band. | High-end microwave and millimeter-wave applications. Used in aerospace, high-end R&D, and other scenarios requiring millimeter-wave frequency measurement capabilities, such as radar system testing and microwave component verification. |

> Important Note: The specific frequency range (e.g., 4GHz, 6GHz, or higher) and pre-installed content of the N993x series may vary based on Keysight's current sales strategy and package offerings. Confirm the specific product datasheet before purchasing.

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III. Core Application Scenarios

In-depth Interference Troubleshooting (N9935A): Locating and analyzing intermittent, burst interference signals in complex electromagnetic environments, a task beyond the capabilities of ordinary spectrum analyzers.
Comprehensive Field Maintenance (N9936A): One device handles all tasks: testing antenna VSWR (CAT), measuring filter performance (VNA), checking transmission signal quality (SA).
High-Frequency System Installation and Debugging (N9937A/8A): Testing and troubleshooting high-frequency components, cables, and systems at sites like satellite earth stations and microwave towers.

IV. Differences from the N991x Series and Summary

N991x Series: Standard models. Users purchase a base configuration (e.g., N9914A-4GHz) and later separately purchase and activate (License) the required software options (e.g., VNA mode, RTSA mode, etc.) as needed.
N993x Series: Special pre-configured models. Keysight pre-installs commonly used advanced options and sells them as a packaged product model. For users who clearly know they need these advanced features, purchasing the N993x series is often more convenient and potentially more economical than buying a "base model + all options" separately.

Summary:
The N993x series are the "expert" or "flagship" packages within the FieldFox platform. They are not new hardware platforms but functionally optimized packages for specific niche markets. Choosing the N993x series means directly selecting tools prepared for specific complex tasks, such as professional interference analysis or millimeter-wave measurements.
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