Shortwave Radio
Monitoring Station

Automated Radio Monitoring (ARM)
by DARC e.V. Germany in IARU region 1

Radio Monitoring Station

Our radio monitoring station covers the spectrum from 1.6 to 30 MHz and consists of powerful commercial components. It is run by the Intruder Monitoring of DARC ham radio club in Germany.

Currently, the system mainly focuses on emissions in the 60, 40, 20, 17, 15 and 10 metre amateur radio bands.

Description of the system



We use a professional magnetic broadband atnenna that delivers a spectrum in the range of 1.6 to 30 MHz to an antenna splitter.


Spectrum delivery

By the antenna splitter the spectrum is beeing distributed to several Winradio SDR receivers. From there, sections of the spectrum reach a server on the intermediate frequency level.


Server and Software

Several softwares run on the server. The main component of the monitoring station is go2monitor from Procitec, a professional software for automated radio monitoring. Several databases and media servers, in which the results are stored, also run on this server.


Automatic Broadband classification

In the first step, the spectra are examined in a broadband classifier. Here all emissions are already detected. Modulation, bandwidth, symbol rate, shift and other parameters are shown for all classified signals within the selected wideband frequency range.


Narrowband Channel processing

The system is configured to respond to non-amateur radio signals. These signals are examined in more detail and recorded in the narrowband processing. Among other parameters, the exact modem is also determined. All results are stored in the database.



The software uses a special production channel for classification, recognition and decoding mode. Here interesting emissions will be examined in more detail.
Suitable decoders and modems will be fully automated selected depending on the classification
and recognition result.


Database storage

Recordings can be extracted in the spectrogram of the signal view for selected time/frequency ranges and for results. The extracted recordings are also added to the database. Thus, we can also retrieve signals from the past from the database and examine them again.

Example of our Automated Radio Monitoring System in action


The intruder monitoring of the DARC operates its own radio direction finding service.

Our team uses networked SDR receivers and determines the location of a radio station based on delay time differences.


DARC e.V.                     
Lindenallee 4
43225 Baunatal


via Form              

+49561 949880