Agilent/Keysight U7237A

The Agilent/Keysight U7237A is a test fixture that provides direct access to 10GBASE-T Ethernet electrical signals for conformance testing and device characterization. It enables efficient signal acquisition and analysis when paired with compatible oscilloscopes and software, supporting IEEE 802.3an-2006 Sub-clause 55.5.2.1 validation workflows. The fixture uses SMP connectors and integrates a wide bandwidth balun for differential-to-single-ended signal conversion.

– Technical Specifications

Electrical Performance
• Bandwidth: 3 GHz
• Balun bandwidth: 300 kHz to 3 GHz
• Insertion loss: <0.5 dB (0–500 MHz), <1.5 dB (500 MHz–1 GHz), <3.2 dB (1–2 GHz), 30 dB

Connectors & Conversion
• SMP connectors for direct signal access
• Integrated wide bandwidth balun for differential-to-single-ended conversion

– Key Features

The fixture ships as a segmented board with V-cut breakout tabs. Sections 1 and 2 support conformance testing; Section 3 accommodates Vector Network Analyzer calibration. SMP connector mating requires straight insertion; avoid lateral pressure and hold only the knurled end.

– Typical Applications

Conformance validation and debugging of 10GBASE-T Ethernet designs. Signal acquisition and spectral analysis for linearity and power spectral density measurements.

– Compatibility & Integration

Works with Keysight Infiniium oscilloscopes (4 GHz minimum bandwidth recommended for linearity tests; 2 GHz minimum bandwidth generally required). Requires associated U7236A/B 10GBASE-T conformance software. Optional support for Spectrum Analyzers (Keysight MXA, EXA, PSA, ESA series with ≥3 GHz upper frequency limit) and Vector Network Analyzers (Keysight 875x, 439x, E506x/7x, N5230A series; 1 MHz to 500 MHz usable range). Operating temperature: 0°C to 40°C. Indoor use only.