Broadband noise source

York EMC Services has introduced the CNE III comparison noise emitter.

It is a broadband noise source with a usable output power from 9 kHz to 2 GHz. Three monopole antennas are available which may be attached to the BNC connector on top of the unit enabling it to act as a radiating field source.

It can be used as a source for carrying out checks on open area test sites and anechoic chambers. The broadband nature of the output enables the observation of details which would be missed with a comb generator.

The power output also avoids the overloads possible with impulsive noise sources which may cause damage to the sensitive input circuits of receiving equipment.

The unit is battery powered so that it can be operated as a small source without the effect of cables which would modify the fields generated. Alternatively, cables can be connected to the output or the earth stud on one side of the unit to investigate the effect of cables and cable positioning on measurements.

The device is housed in a plated metal box so that it can be mounted in direct contact with a metal ground plane if desired.

An adapter is available that provides a capacitive link from the output to a standard IEC 320 mains power connector. This allows checks and investigations on conducted measurements to be made (eg, LISN, absorbing clamp).

The microprocessor control allows the operating time to be adjusted from a minimum of 15 mins to continuous operation. The unit will turn off automatically if the batteries are low.