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N4000A

Keysight Technologies (Agilent HP)Sources, Noise

The Keysight N4000A is a smart noise source from the SNS series, operating from 10 MHz to 18 GHz with a nominal Excess Noise Ratio (ENR) of 6 dB. It is specifically designed to accurately measure devices with a low noise figure (up to 20 dB) or those whose gain is especially sensitive to small changes in source impedance. The N4000A features internal electronic storage of ENR calibration data, automatic data download to compatible NFA series analyzers, and temperature compensation for improved measurement accuracy.

MicrowaveNoise FigureRF and Microwave

Specifications

General

ParameterValue
InterfacesProprietary SNS multi-pin connector

Physical

ParameterValue
Power SupplyPowered via SNS multi-pin cable from host instrument (+28V pulsed)
Operating Temperature0 to 55 °C

Frequency Specifications

ParameterValue
Frequency Range10 MHz to 18 GHz

Noise Specifications

ParameterValue
Nominal Excess Noise Ratio (ENR)5.25 dB

Performance

ParameterValue
Temperature CompensationIncluded (improves measurement accuracy)
Maximum VSWR (0.01 to 0.03 GHz)1.04:1
Maximum VSWR (0.03 to 1.5 GHz)1.04:1
Maximum VSWR (1.5 to 3.0 GHz)1.04:1
Maximum VSWR (3.0 to 7.0 GHz)1.13:1
Maximum VSWR (7.0 to 18.0 GHz)1.22:1
ENR Calibration Uncertainty (0.03 to 1.5 GHz)±0.16 dB
ENR Calibration Uncertainty (1.5 to 3.0 GHz)±0.15 dB
ENR Calibration Uncertainty (3.0 to 7.0 GHz)±0.15 dB
ENR Calibration Uncertainty (7.0 to 18.0 GHz)±0.16 dB

Impedance and RF Characteristics

ParameterValue
Nominal Impedance50 Ω

Calibration and Data Storage

ParameterValue
Internal Calibration Data StorageElectronic storage of ENR calibration data
Automatic Data DownloadSupported (to NFA series)

Connectivity and Interfaces

ParameterValue
RF Output ConnectorAPC 3.5 (m) (standard)
Compatible InstrumentsNFA Series

Technology

Smart Noise Source

Applications

Noise Figure Measurement, Low Noise Figure Devices, Impedance Sensitive Devices