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RF Accessories

XNF40-U USB Intelligent Noise Source

10 MHz–40 GHz USB Intelligent Noise Source

XNF40-U provides 12–19 dB ENR for noise-figure measurements, with USB-TMC control, stored calibration data and real-time temperature correction.

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XNF40-U USB Intelligent Noise Source
Frequency range
10 MHz to 40 GHz
Excess noise ratio (ENR) range
12 dB to 19 dB
RF output interface
2.4 mm male
Driver interface
USB bus driver interface

Overview

XNF40-U supplies random, continuous spectral signals for noise-figure measurements from 10 MHz to 40 GHz. Its excess noise ratio ranges from 12 to 19 dB, with a 2.4 mm male RF output.

USB-TMC supports connection to Windows and Linux instruments or a computer. Stored frequency/ENR data can load into the measurement host, and a digital temperature sensor supports correction as ambient temperature changes.

Additional product details

The XNF40-U generates random, continuous spectral signals for noise figure measurements.

USB control

The USB interface supports the USB-TMC protocol, Windows and Linux test instruments, and computer-controlled operation.

Stored calibration data

Electronic memory stores frequency and ENR data pairs. Automatic identification and plug-and-play operation load the ENR table into a noise figure measurement instrument, improving measurement speed.

Temperature correction

The built-in digital temperature sensor detects changes in ambient temperature in real time. Temperature correction of noise figure measurements improves measurement accuracy.

Key Capabilities & Applications

Generate calibrated noise

Frequency coverage is 10 MHz to 40 GHz with 12 to 19 dB ENR. Output-port VSWR is below 1.35:1 to 18 GHz and below 1.45:1 from 18 to 40 GHz.

Load the ENR data

Electronic memory stores frequency and ENR pairs for automatic loading into a noise-figure measurement instrument. An ENR calibration data set is included.

Control and correct over USB

USB-TMC supports Windows and Linux instruments or a computer. The built-in digital temperature sensor supports real-time temperature correction in noise-figure measurements.

Common applications

  • Noise figure measurement systems
  • Independent calibration-source use
Applications and test requirements

Noise figure measurement systems

The noise source provides a noise power standard for noise figure measurement systems.

Independent calibration-source use

Technical Specifications

ParameterSpecification
Technical Specifications
Frequency range10 MHz to 40 GHz
Excess noise ratio (ENR) range12 dB to 19 dB
RF output interface2.4 mm male
Driver interfaceUSB bus driver interface
Dimensions (W × H × D)(38 ± 1.5) mm × (28 ± 1.0) mm × (130 ± 1.5) mm
Weight(170 ± 10) g
Detailed performance and interface tables (1)
Output port VSWR
FrequencyOutput port VSWR
10 MHz to 18 GHz< 1.35:1
18 GHz to 40 GHz< 1.45:1

Specifications are subject to change without notice.

Models, Configuration & Compatibility

XNF40-U

Standard delivery contents

  • USB cable (×1) — 2.0 m, for drive and communication
  • Coaxial adapter (×1) — For connecting the noise source output to a measurement host input
  • ENR calibration data set (×1)
  • Product certificate of conformity (×1)
Control interfaces and software

USB-TMC control supports connection to Windows and Linux test instruments or a computer. Electronic memory stores frequency and ENR data pairs for automatic loading into a noise figure measurement instrument. A built-in digital temperature sensor supports real-time temperature correction.

USB-TMC · Windows · Linux

Technical Resources

Download Datasheet

PDF technical specifications

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Selection guidance

Format: USB intelligent noise source

Coverage: 10 MHz to 40 GHz; ENR 12 dB to 19 dB

Best for: Noise figure measurement systems and independent calibration-source use.

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