Tel: +44 (0) 1904 324440

CNE III

Comparison Noise Emitter III


CNE III

 

This product has been discontinued.

Please see the CNE VI, CNE V+ or CNE V for an alternative.

Description

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.

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.

Features

Continuous, broadband outputFull spectrum measurements and analysis
Stable outputRepeatable measurements
Conducted and radiated optionsEvaluation of both conducted and radiated systems
9 kHz to 3.5 GHz outputApplications across a broad frequency spectrum
Compact and portableComparisons between sites and environments
Battery poweredNo power or interconnecting cables affecting measurements
Auto-off timerAdjustable shutdown period to save battery power

Applications

  • Radiated and conducted measurement systems validation and verfication
  • Radiated measurement systems validation and verification
  • Reference source for:
    • Daily pre-test verification checks if required by the accreditation authorities e.g. ISO 17025
    • Long-term performance monitoring
    • Spectrum analyser / receiver pre-checks
    • Cable position investigation
  • Investigation and characterisation of screened room/anechoic room/OATS behaviour
  • Comparisons between different measurement environments e.g. OATS or anechoic chambers
  • Characterisation of filter performance
  • Cable loss measurements

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.

Specifications

 
Frequency Range9 kHz to 3.5 GHz (usable to 5 GHz) into a 50 Ω system
 30 MHz to 3.5 GHz radiated (using TLM01, TLM02, MCN01 antennas)
Output connector50 Ω N-type socket
Temperature stability (15 °C to 30 °C) 500 kHz to 3.5 GHz, <±1 dB
 (5 °C to 40 °C)  9 kHz to 5 GHz, <±2 dB
Time stabilityTypically <1 dB over a 12 month period
Power off timerAlways-on operation or variable between 15 and 135 minutes (15 min steps)
Dimensions206 mm × 120 mm x 63 mm (80 mm inc. connector) (excluding antenna)
WeightApprox 1.3 kg (including battery)
Power supply2 x C-cells. Alkaline or rechargeable
Operating Time12 hours typical with alkaline cells
IndicatorsPower on - green LED
 Timeout, low battery - red LED

 

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.

Specifications

 
Frequency Range9 kHz to 3.5 GHz (usable to 5 GHz) into a 50 Ω system
 30 MHz to 3.5 GHz radiated (using TLM01, TLM02, MCN01 antennas)
Output connector50 Ω N-type socket
Temperature stability (15 °C to 30 °C) 500 kHz to 3.5 GHz, <±1 dB
 (5 °C to 40 °C)  9 kHz to 5 GHz, <±2 dB
Time stabilityTypically <1 dB over a 12 month period
Power off timerAlways-on operation or variable between 15 and 135 minutes (15 min steps)
Dimensions206 mm × 120 mm x 63 mm (80 mm inc. connector) (excluding antenna)
WeightApprox 1.3 kg (including battery)
Power supply2 x C-cells. Alkaline or rechargeable
Operating Time12 hours typical with alkaline cells
IndicatorsPower on - green LED
 Timeout, low battery - red LED

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.

Standard Kits:

Part Number

Description

Parts included

CNEIIIKIT01Standard CNE III comparison continuousCNE III noise source
 noise emitter kitTLM01 - 200 MHz to 1GHz (optimum) 100 mm
  long top-loaded monopole antenna
  LSA03 - LISN adapter with IEC-style
  connection
   
CNEIIIKIT02Enhanced CNE III comparison continuousCNE III noise source
 noise emitter kitTLM01 - 200 MHz to 1 GHz (optimum) 100 mm
  top-loaded monopole antenna
  TLM02 - 30 MHz to 300 MHz (optimum) 290 mm
  top-loaded monopole antenna
  MCN01 – 1 GHz+ (optimum) detachable
  monocone antenna
  LSA03 - LISN adapter with IEC 320 style
  connection
   

All kits are supplied with:

 Alkaline batteries
 N-type adapters
 Hard case
 CAL01 - 0 to 5 GHz output power measurement using spectrum analyser

Accessories

TLM01200 MHz to 1 GHz (optimum) 100 mm top-loaded monopole antenna
TLM0230 MHz to 300 MHz (optimum) 270 mm top-loaded monopole antenna
MCN011 GHz+ (optimum) monocone antenna
LSA03LISN adapter with IEC 320 style connection
NIA01ISN adapter with RJ11/RJ14/RJ25/RJ45 style connection

 

ABOUT US

A wholly owned subsidiary of the University of York, we have been successfully delivering EMC training courses, designing and selling test instrumentation for over 20 years.

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York EMC Services Ltd
Market Square
University of York
Heslington
York
YO10 5DD

Tel: +44 (0) 1904 324440
Fax: +44 (0) 1904 324434
Email: enquiry@yorkemc.co.uk
Website: www.yorkemc.co.uk