18 GHz EMI receiver enables direct connection to the antenna
The PMM 9010 digital EMI receiver features a modular design that allows the main unit (10 Hz to 30 MHz) to be extended in frequency to 3 GHz (PMM 9030), 6 GHz (PMM9060) and to 18 GHz with the just released model PMM 9180 by simply adding one of these external modules. All these modules are EMI receivers that are fully compliant to the latest CISPR and MIL-STD standards.
Small-sized and lightweight, these modules can be easily installed inside the anechoic or shielded chamber, directly connected to the measuring antenna and fixed to the mast by means of an adapter. The connection with the main unit PMM 9010 – which remains in the instrument room – is made by high-speed digital link via fiber optic cable. Up to four hours of continuous in-room operation are provided by the plug-in, rechargeable Li-Ion battery.
This 18 GHz solution is the result of Narda’s advanced capabilities in miniaturized RF and digital design. The most evident advantage offered by the PMM’s system is the possibility of replacing the coaxial cable by fiber optic, with several advantages:
- elimination of signal loss due to the coaxial cable and connections;
- improvement of the receiver dynamic range without needing expensive preamplifiers;
- improvement of the overall uncertainty: such contributions from cables and connectors (loss, mismatches, aging) are just not present;
- elimination of interfering signals that may be picked up along the coaxial cable path;
- elimination of scattering phenomena due to the coaxial cable;
- expensive calibrations of the coaxial cables are no longer needed;
- in comparison with coaxial cables, the unpaired flexibility of fiber optic allows for easier installation even in the same path as power cables and reaches much longer distances (up to 100 m).
The PMM Emission Suite software is supplied with the receiver, and allows for complete control of the tests, including mast and turntable functions.
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