RMS-DF-X Intercept and Direction Finding (DF)

Brief Overview

RMS-DF-X is a family of V/UHF Intercept and Direction Finding (DF) sensors which allow the operator to quickly scan the spectrum in order to detect and analyse Low Probability of Intercept (LPI) signals and to geolocalise their emitters.


RMS-DF-X can be operated in automatic or manual mode either from a local operator station or from remote.


RMS-DF-X can be used as a stand-alone sensor or as part of a larger Direction Finding network. It can also be easily integrated into large radio monitoring systems as a wideband signal detection and DF unit.


RMS-DF-X combines in the same system various Direction Finding techniques such as Ad-Cock, correlative and Correlative Vector Interferometry (CVI), highly accurate and effective against LPI signals. RMS-DF-X  also provides TOA  and TDOA (requires fewer receivers and works well against wide band signals) geolocalisation capabilities.


RMS-DF-X simultaneously carries out spectrum scanning while it estimates the Directions of Arrival of all the detected signals; even the shortest emission is detected and geolocalised.


This is an essential factor in the geolocalisation of fast frequency hopping communications.


  • Electronic Surveillance (ES)
  • Intercept and Direction Finding (DF)
  • Anti-Drone: detection and triangulation of drones and their remote controllers
  • Wide band radio monitoring and spectrum surveillance for SIGINT and COMINT
  • Surveillance of strategic sites (airports, ports, borders) for interference detection and identification
  • Automatic signal detection, identification and classification
  • Jammer detection and triangulation

System capabilities

  • Scan mode: fixed frequency, frequency bands, channel list
  • Multiple signal detection thresholds
  • Wideband DF-while-Scan: simultaneous signal detection and direction finding
  • 3D direction finding for airborne operations
  • TOA and TDOA measurement for geolocalisation
  • Advanced signal analysis features such as frequency hopping, automatic modulation recognition, GPS interference detection, etc. are available as an option
  • Spectrum recording and playback for off-line signal analysis
  • Programmable alarms for automatic processing of Signals of Interest
  • ITU-R compliant measurements
  • All Over IP: remote control and network centric operation
  • Open architecture for integration with third party software and systems.

Optional features

  • Automatic modulation recognition
  • Frequency Hopping detection, geolocation and analysis
  • GPS signal interference and spoofing detector
  • Mobile phone communications detection, direction finding and analysis
SMS - Spectrum Monitoring Suite SMS - Spectrum Monitoring Suite

System architecture

RMS-DF-X has a real Software Defined Radio architecture based on two main components: a software signal processing application called SMS (Spectrum Monitoring Suite) and a set of wideband digital receivers.


In accordance with Customer needs, the wideband digital receivers can be chosen from an assortment of models available on the market, each with varied performance and cost.


The only change required to integrate a new tuner is the development of its specific software driver.


This flexibility means the Customer can have new radio monitoring capabilities using hardware acquired in the past.


Just by changing the type and the number of digital receivers, the User can reconfigure the system to fit his operational requirements.


For example, it is possible to have:


• a wideband radio monitoring receiver with TDOA (one receiver)

• a dual channel, correlative interferometry, direction finder with TDOA (two receivers)

• a five channel, correlative interferometry, direction finder with TDOA (five receivers)

RMS-DF-X Software Defined Radio Architecture RMS-DF-X Software Defined Radio Architecture


RMS-DF-5-MK1 is a high performance radio monitoring systems.

The system operates in the bandwidth 20 MHz - 6 GHz offering very high performance in terms of sensitivity, tuning speed, bandwidth and accuracy.



RMS-DF-5-N200 is a good trade off configurations in terms of performance, cost and installation requirements.

The front-end system consists of configurable modules with an instantaneous bandwidth of 15 MHz. Additional modules can be integrated into the system with the function of hand off receivers for the narrowband analysis of the signals of interest.

RMS-DF-5-N200 RMS-DF-5-N200

In accordance with English and Italian law it might be necessary for LOG.IN to obtain an export license from the Export Control Authority.


LOG.IN does not expect any difficulties in obtaining the export license but the final response can only be given from the authority after the system configuration, the content of the service and the End Customer have been clearly identified.

Quick Links

Privacy Policy