RIGOL DNA-DTF10 DISTANCE TO FAULT SOFTWARE

Overview

The RIGOL DNA-DTF10 is a specialized Measurement Application Option designed for the Rigol DNA Series Vector Network Analyzers. It provides critical Distance To Fault (DTF) capabilities, enabling engineers to locate exact physical faults—such as short circuits, open circuits, or loose connectors—along a transmission line or cable system.

By measuring the reflection coefficient in the frequency domain and applying an Inverse Fast Fourier Transform (IFFT), the analyzer converts the data into a time-domain response. Utilizing the known velocity factor of the transmission medium, the software calculates and displays the precise distance to the impedance discontinuity, making it an indispensable tool for antenna installation, cable maintenance, and RF system verification.

Product Features

Precise Distance Calculation

The system accurately calculates the physical distance to the fault using the fundamental relationship between the speed of light, the round-trip time of the reflected signal, and the medium's specific velocity factor: L = (c * t * VF) / 2. The measurement results are clearly plotted on the display, showing transmission loss (Y-axis) versus distance (X-axis).

Intelligent Stop Distance & Resolution

Users can define a specific Stop Distance to filter out irrelevant regions and focus exclusively on the target cable segment. The system intelligently links this parameter to the sweep frequency span and data points, optimizing the distance resolution and preventing measurement failures caused by "unambiguous distance" signal superposition.

Automatic Cable Loss Compensation

As electromagnetic waves naturally attenuate over long cables, weak reflection signals can lead to missed faults. The DNA-DTF10 allows users to input the specific cable loss (in dB/m) to mathematically compensate for this signal attenuation, ensuring highly precise peak amplitude readings for faults regardless of their depth in the transmission line.

Flexible Windowing Functions

To optimize the mathematical conversion from the frequency domain to the time domain and reduce sidelobe interference, the software provides selectable filter window types, including Rectangular, Hanning, Hamming, Gaussian, and Flattop, easily adapting to diverse measurement scenarios.

Technical Specifications

• Supported Analyzers: RIGOL DNA800, DNA5000, DNA6000 and DNA6000-R Vector Network Analyzers

• Primary Function: Locates impedance discontinuities by converting frequency-domain reflection signals into distance data via IFFT

• Distance Calculation Formula: L = (c * t * VF) / 2 (where c is the speed of light, t is the round-trip time, and VF is the Velocity Factor)

• Distance Units: Meter, Feet, Inch

• Selectable Window Types: Rectangular, Hanning, Hamming, Gaussian, Flattop.