This product has been discontinued.
Please see the CNE VI, CNE V+ or CNE V for an alternative.
Please contact us for details regarding repairs, calibrations or other information regarding these products.
The Comparison Noise Emitter III (CNE III) is a broadband noise source providing a continuous output from 9kHz to 3.5GHz. The stable output allows the CNE III to be used as a general-purpose reference source for characterizing and verifying both conducted and radiated test environments. The CNE III has become an accepted industry reference ‘standard’ since its introduction in 1988.
The broadband nature of the output enables the observation of details within the spectrum that would be missed when using a comb generator, whilst the power output level of the unit avoids the overloads possible with impulsive noise sources that may cause damage to the sensitive input circuits of receiving equipment.
The CNE III is supplied with a 50 Ω N-type output connector for direct connection to conducted measurement systems. An IEC 320 adapter is also available to provide a connection to LISN equipment, as well as an RJ11/RJ14/RJ25/RJ45 adapter for connection to telecoms ISNs.
The CNE III can also be connected to an antenna, to generate reference fields for use with radiated emissions test environments such as Open Area Test Sites and anechoic chambers. A selection of antennas that connect directly to the CNEIII for this purpose is available. The CNE III is compact and battery powered to allow operation as an electrically small source, thereby minimising the effect of the structure of the CNE III itself when used as a radiating reference. Conversely, cables may be attached to the enclosure earth stud and/or the signal output to investigate and characterise any measurement effects caused by changes in the wiring layout.