Agilent/Keysight N7550A

The Keysight N7550A is a 2-port electronic calibration module engineered for vector network analyzers and handheld test instruments. This solid-state device delivers fast, traceable calibrations across DC to 4 GHz, reducing calibration time by up to 50% compared to mechanical kits. A single USB 2.0 micro connection controls the module and communicates S-parameter data, eliminating manual operator errors inherent in traditional methods.

The N7550A stores unique, internally verified electronic impedance standards that the VNA uses to calculate error terms with NIST traceability. Calibration accuracy reaches ±0.3 dB typical across its operating band. The module's solid-state design and value-line pricing make it cost-effective to replace rather than recertify, delivering consistent, repeatable results without mechanical wear.

Technical Specifications

• Frequency Range: DC to 4 GHz


• Ports: 2-port configuration


• Connectors: 3.5 mm or Type-N (female-female, female-male, or male-male options)


• Impedance: 50 ohms typical


• Calibration Accuracy: ±0.3 dB typical


• Insertion Loss: 20 dB typical


• Maximum Input Power: +23 dBm average


• Maximum Reverse Power: +20 dBm average


• Power Supply: +15 VDC ±5% at 0.5 A max


• Operating Temperature: +15 to +35°C, up to 75% RH


• Dimensions: 241 × 216 × 89 mm


• Weight: 2.2 kg

Key Features

• USB 2.0 micro-interface for integrated instrument control


• Traceable and verifiable electronic impedance standards


• Eliminates mechanical calibration errors


• Stored S-parameter data ensures measurement traceability


• Firmware-controlled automation on compatible instruments

Compatibility & Integration The N7550A integrates with Keysight PNA-X, PNA, ENA, and PXI vector network analyzers, plus FieldFox handheld analyzers. Instrument firmware handles all calibration control, creating a fully automated two-port measurement solution via a single USB connection.