The Comparison Noise Emitter III

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Comparison Noise Emitter III
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The industry standard reference noise source offering continuous radiated and conducted outputs up to 3.5GHz.

Continuous, broadband output
Full spectrum measurements and analysis
Stable output
Repeatable measurements
Conducted and radiated output options
Evaluation of both conducted and radiated systems
9 kHz to 3.5 GHz output
Applications across a broad frequency spectrum
Compact and Portable
Comparisons between sites and environments
Battery powered
No power or interconnecting cable effects on measurements

Radiated Emissions

The CNE III is a broadband noise source which provides continuous output power from 9kHz to 3.5GHz. The broadband nature of the output enables the observation of details within the spectrum which would be missed with a comb generator. For radiated operation three monopole antennas, optimised for different bands of the spectrum, are available which attach to the top of the unit. The CNE III is an ideal source for carrying out checks on open area test sites (OATS) and anechoic chambers.

The CNE III is battery powered to allow operation as an electrically small source which minimises the effect of the structure of the CNE III itself when characterising the electromagnetic environment. Conversely, if desired, cables may be attached to the earth stud or the RF output to allow characterisation and investigation of the effects of changes in the wiring layout on measurements. The CNE III is housed in a metal box so that it can be mounted in direct contact with a metal ground plane as may be required by some tests. The power output level of the unit avoids the overloads possible with impulsive noise sources which may cause damage to the sensitive input circuits of receiving equipment.

Conducted Emissions

In the same way that using the CNE III with an antenna can be used to check radiated measurement systems, an N-type connector provides a direct 50Ω matched output which can be used to carry out checks on conducted measurement systems. An adaptor is available (LSA03) which provides a capacitive link from the output of the CNE to a standard IEC 320 mains power connector. This allows checks and investigations on conducted measurement systems to be made, for example using a LISN or an absorbing clamp.

Applications

Specifications

Specifications
Frequency Range Direct connection 9kHz to 3.5GHz (usable to 5GHz) into a 50Ω system
Radiated 30MHz to 3.5GHz, using TLM01, TLM02, MCN01 antennas
Output connector 50Ω N-type socket
Temperature stability 15°C to 30°C <±1dB 500 kHz to 3.5GHz
5°C to 40°C <±2dB 9 kHz to 5GHz
Time stability Typically <1dB over a 12 month period
Power off timer Continuous operation or variable between 15 and 135 minutes in 15-minute steps.
Dimensions 206mm × 120mm × 80mm (excluding antenna)
Weight 1.3kg (excluding battery)
Power supply 2 × C-type cells. Alkaline or rechargeable
Operating time 12 hours typical with alkaline cells
Indicators Green LED Power on
Red LED Battery low, timeout

Standard Order Kits

Part Number Description Parts Included
CNEIIIKIT01 Standard CNE III comparison continuous noise emitter kit with antenna and LISN adaptor
  • CNE III noise source
  • TLM01 - 200MHz to 1GHz (optimum) 100mm long top-loaded monopole antenna
  • LSA03 - LISN adapter with IEC-style connection
  • Alkaline batteries
  • Hard case
  • CAL01 - Standard test results
CNEIIIKIT02 Enhanced CNE III comparison continuous noise emitter kit with multiple antennas and LISN adaptor
  • CNE III noise source
  • TLM01 - 200MHz to 1GHz (optimum) 100mm long top-loaded monopole antenna
  • TLM02 - 30MHz to 300MHz (optimum) 290mm long top-loaded monopole antenna
  • MCN01 - 1GHz+ (optimum) monocone antenna
  • LSA03 - LISN adapter with IEC-style connection
  • Alkaline batteries
  • Hard case
  • CAL01 - Standard test results

Accessories

Accessory Part Nº Description
Antenna TLM01 200MHz to 1GHz (optimum) 100mm long top-loaded monopole
TLM02 30MHz to 300MHz (optimum) 290mm long top-loaded monopole
MCN01 1GHz+ (optimum) monocone
Direct coupler LSA03 LISN adapter with IEC-style connection

Output Measurement Results

Type Order Nº Description
Direct Output CAL01 0 to 5GHz power measurement using spectrum analyser
Radiated Output CAL02 30MHz to 1GHz horizontal and vertical polarisation electric field-strength on OATS using receiver, either 3m or 10m
CAL06 30MHz to 1GHz horizontal and vertical polarisation electric field-strength in FAR using a spectrum analyser at 3m

Typical Output Measurement Results

Direct Output Power 0 - 500kHz Direct Output Power 0 -30MHz Direct Output Power 0 - 1GHz Direct Output Power 0 - 5GHz
Electric Field Strength - 3m OATS Horizontal Electric Field Strength - 3m OATS Vertical
Electric Field Strength - 3m FAR Horizontal Electric Field Strength - 3m FAR Vertical

Further details can be obtained from:

York EMC Services Ltd
University of York
Heslington
York
YO10 5DD
Tel: +44 (0)1904 324440
Fax: +44 (0) 1904 324434
E-mail: enquiry@yorkemc.co.uk

Last checked: 2013-Jun-21

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