Interfering radio communication emissions can be difficult to detect if they are masked by the signals of the victim receiver; with conventional spectral analysis, the interference cannot be identified.
For this reason, Narda Safety Test Solutions has incorporated a Persistence Spectrum mode into the IDA 2 Interference Analyzer and Radiolocation System. This mode simultaneously displays the signals from the victim receivers and the underlying interfering signals. For example, it can reveal interference beneath typical GSM signals with their variable channel assignments, or the signal hidden within a DAB channel, because the interfering emission leaves traces in the persistence spectrum in the segments corresponding to the "null" symbols.
The IDA 2 generates a digital display of signal persistence with a usable bandwidth of up to 22 MHz. It offers various trigger types to capture brief events. It can even detect unknown interference, thanks to its 0.1 Hz resolution bandwidth (RBW) and optimal temporal accuracy of up to 1 μs, displaying the amplitude-time graph with a 32 ns resolution.
Digital Persistence Display:
The Digital Persistence Display operates in the Analyzer's I/Q mode. For display, the IDA 2 overlays a certain number of traces derived from the stored I/Q data. The colors indicate the number of times a particular value has appeared. The Digital Persistence Display resembles the reluctance effects of older spectrum analyzers, but it is much more accurate and records more information. This feature is typically only found in the most modern laboratory instruments, usually in very high price ranges. The Narda Safety Test Solutions IDA 2 now incorporates this and other functionalities into a portable instrument
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IDA 2: Main Features:
The IDA 2 Interference and Radiolocation Analyzer is designed to identify and locate radio emissions and is applicable to both the civilian communications and security sectors. In the civilian sector, it is necessary to locate and eliminate interference affecting communications. In the security sector, the IDA 2 allows for the practical and rapid location of unknown emission sources and the identification of potential risks. Using a horizontal scan, the IDA 2 automatically determines the direction of the emission source and displays it on a polar diagram. By taking multiple measurements, the IDA 2 can automatically calculate and display the exact position of the source generating the interference. The results can be overlaid on digital maps, precisely indicating the location of the emission source, similar to navigation systems.
The location of the source generating the interference is determined using the GPS receiver and electronic compass integrated into the antenna mount, allowing the direction, elevation, and polarization to be defined.
The IDA 2 comes with a set of optimized antennas with directional radiation patterns for frequency ranges from 15 kHz to 6 GHz. Depending on the range in which the analysis and/or detection of emissions is to be performed, the appropriate antenna is selected. This antenna can be easily inserted horizontally or vertically into the ergonomically designed antenna mount.
The IDA 2 is ideal for field missions. Including the battery, it weighs less than 3 kg. The antenna and stand are powered through the main unit and weigh less than 1 kg. The battery can be replaced anywhere without interrupting operations.
