Features:
- Broadband Coaxial Measurements from 45 MHz to 40 GHz
- Dual Port Architecture (8514B, 8515A and 8516A)
- Coupler-Based (8514B and 8516A)
The Keysight 851x Series Network Analyzers and S-Parameter Test Sets offer broadband coaxial measurements from 45 MHz to 40 GHz. The 8514B, 8515A, and 8516A test sets have a dual port architecture which develops a separate reference channel for each incident port. RF switching is done with a single built-in electronic switch. For active device measurements, the test sets include the ability to apply DC bias (external) to the test port center conductors.
The 8514B and 8516A test sets are coupler-based. With the 8511A Frequency Converter, the 8510 becomes a general purpose four-channel magnitude/phase receiver. A single 8510B system may be configured with two test sets. In this configuration, the test sets have different addresses, and the user may select between them from the front panel of the 8510 without re-connections. This capability is useful, for example, when combining a microwave coaxial test set with a millimeter-wave test set in the same 8510 system. IF switching (option 001). In the multiple test set configuration, the 20 MHz IF signal is daisy-chained from the test sets to the 8510. This capability requires test set option 001 in one of the two test sets.
The 8515A Keysight 50 Ohm S-Parameter Test Set may still be available for purchase and support from Artisan Technology Group beyond End-Of-Life (EOL) by the manufacturer (OEM).
Functions
Performs scattering parameter measurements for high-frequency components using 50 Ohm impedance, enabling vector network analysis. Compatible with microwave network analyzers for measuring reflection and transmission coefficients across a wide frequency range. Executes signal routing and bidirectional testing with minimal signal loss. Equipped with precision connectors for enhanced accuracy and stability.
Platforms
The equipment is designed to operate as a standalone component within a test and measurement system. It connects to a network analyzer via coaxial RF cables, utilizing 50 Ohm impedance. It interfaces with other equipment through BNC connectors for various control signals, and typically integrates with a computer via GPIB for automated testing and data acquisition.
Applications
Measurement and characterization of RF and microwave network parameters, specifically S-parameters, in 50 ohm impedance environments. Used in conjunction with vector network analyzers for precise determination of reflection and transmission coefficients of components, filters, amplifiers, and antennas across a wide frequency range. Supports calibration routines and accurate de-embedding of test fixture contributions in device characterization processes. Essential for design validation, quality control, and performance verification in high-frequency circuit development and production testing.
Accessories
Requires network analyzer mainframe such as the Agilent/Keysight 8510 series for operation. Connects using 3.5 mm male coaxial connectors at two test ports (port 1 and port 2) designed for 50 Ohm systems. Operates over 45 MHz to 26.5 GHz frequency range with nominal input power from -5 to -25 dBm. Includes separate reference channels for incident ports and is intended for broadband coaxial S-parameter measurements. No additional chassis or backplane is specified beyond the compatible network analyzer mainframe.
Interfaces
Two precision 7mm RF connectors (APC-7) for device under test connection, one DB25 female connector for control interface to network analyzer, BNC connectors for external detector outputs (FWDA, FWDB, REFA, REFB), requires compatible network analyzer such as 8510 series for operation, internal solid-state PIN diode switches for signal routing between ports, 50 ohm characteristic impedance throughout RF path, frequency range 45 MHz to 26.5 GHz, temperature compensated for stability
Specifications
S-parameter measurement test set operating from 45 MHz to 26.5 GHz designed for use with 8510 series network analyzers. Provides full two-port bidirectional measurements with integrated directional couplers, RF switches, and bias tees. Features 50-ohm impedance, Type-N or 3.5mm connectors, and typical directivity >40 dB. Interfaces with analyzer via multi-pin control cable for automated switching between forward/reverse measurements. Enables simultaneous DC bias application up to ±30V while measuring S-parameters. Common applications include characterization of amplifiers, filters, mixers, antennas, and passive components in aerospace, defense, and wireless communications development.
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