CGE03 - Comb Generator Emitter

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Comb Generator Emitter 03
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A reference noise source with a comb output characteristic generating emissions up to 40GHz with 900MHz or 1GHz step size options. Output is via a 2.9mm connector for use with external antennas.

Stable output
Repeatable measurements
Conducted output, radiated output with external antenna
Evaluation of both conducted and radiated systems
900 MHz to 40 GHz output
Applications across a broad, high frequency spectrum
Applicable to harmonics of high frequency systems
Compact and Portable
Comparisons between sites and environments
Shielding effectiveness measurements even of small enclosures
Battery powered
No power or interconnecting cable effects on measurements

The CGE03 is a broadband comb generator emitter with a best-in-class useable output from 900MHz to 40GHz. In contrast to the comparison noise emitters (CNEs), the comb generator approach has been adopted because it lends itself more to higher frequency applications. At higher frequencies the comb spectrum gives a higher output at specific frequencies which enable measurements to be made at those frequencies. It also allows a much smaller physical construction due to reduced power consumption enabling it to be used for shielding effectiveness measurements on small enclosures.

Radiated Emissions

The CGE03 can be used as a reference source for radiated emissions by attaching appropriate antennas to the output. The unit is battery powered so that it can be operated as an independent source without the effect of power cables, which would modify the fields generated. Additionally though, for making measurements of small enclosures, the actual emitter can be separated from the battery pack and operated remotely via a cable carrying only DC power. The CGE03 is housed in a plated metal cylindrical enclosure, thus ensuring uniformity of the field and can be orientated to give vertical or horizontal polarisation.

Conducted Emissions

The CGE03 is supplied with a 50Ω 2.9mm connector allowing it to be used either for the investigation of conducted systems or to be used with an external antenna. The known output allows unknowns within systems or components to be measured or calculated.



Frequency Range 900 MHz to 40 GHz direct connection into a 50Ω system
Radiated emissions via connection to an external antenna.
Step Size 900 MHz or 1 GHz switchable
Output connector 50Ω 2.9mm socket
Temperature stability 15°C to 35°C <2dB
Time stability Typically <1dB over a 12 month period
Dimensions 76mm diameter × 96mm (102mm including connector) - CGE03C with battery pack
76mm diameter × 50mm (56mm including connector) - CGE03C without battery pack
Weight Approx 750g (including battery)
Power supply 5V 2AHr battery pack. External input 5.00V ± 0.25V, 500mA
Operating Time 4 hours typical with fully charged battery pack.
Indicators Active, lower step size - green LED
Active, higher step size - red LED

Standard Order Kits

Part Number Description Parts Included
CGE03KIT01 Standard CGE03C comb generator emitter (conducted output) kit with battery charger
  • CGE03C conducted reference signal source
  • BP01 Rechargeable battery pack
  • Universal input battery charger
  • Standard test CAL15
  • Hard case


MCN01 Antenna Detachable monocone antenna optimised 1GHz - 26GHz
BP01 Battery Pack 5V 2AHr battery pack

Output Measurement Results

Output Measurement Results
CAL15 Direct Output 0 to 40GHz power measurement using spectrum analyser

Typical Output Measurement Results

Output plot of CGE03C - Direct Output Power - 1 GHz Comb Spacing
Output plot of CGE03C - Direct Output Power - 900 MHz Comb Spacing

Further details can be obtained from:

York EMC Services Ltd
University of York
YO10 5DD


Tel: +44 (0)1904 324440
Fax: +44 (0) 1904 324434

Last checked: 2009-May-13