CGE01 - Comb Generator Emitter

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Comb Generator Emitter 01
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A harmonic spectrum reference signal source with a comb output characteristic generating radiated and conducted emissions up to 18 GHz with 50, 80 or 100 MHz step size options. The 50MHz step size allows measurements compliant with chamber validations above 1GHz according to CISPR16.

Stable output
Repeatable measurements
Conducted and radiated output options
Evaluation of both conducted and radiated systems
50 MHz to 18 GHz output
Applications across a broad frequency spectrum
50 MHz step size
Complies with CISPR16 validation methods
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 Comb Generator Emitter (CGE) was originally developed by York EMC Services for the evaluation of shielding effectiveness for small enclosures. In recent years however, the continuing increase in operating frequencies of IT equipment has made the CGE increasingly relevant as manufacturers seek to determine the characteristics of both their equipment and EMC measurement facilities at GHz frequencies.

The CGE01 is a broadband comb generator emitter with a useable output from 50 MHz to 18 GHz. In contrast to the comparison noise emitters (CNE), 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

Available either with an integral monocone antenna or with a detachable monocone antenna the CGE01 can be used as a reference source for radiated emissions. The unit is battery powered so that it can be operated as an independent source without the effect of power or interconnecting cables, which would modify the fields generated. Additionally though, for making shielding effectiveness 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 CGE is housed in a plated metal cylindrical enclosure, thus ensuring uniformity of the field and can be orientated to give vertical or horizontal polarisation. Additionally external antennas can be attached to the output when required.

Conducted Emissions

The CGE01C is supplied with a 50Ω SMA 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.

Applications

Specifications

Specifications
Frequency Range 50 MHz to 18 GHz direct connection into a 50Ω system
50 MHz to 18 GHz radiated using an integral antenna
Step Size 80 MHz or 100 MHz switchable
50 MHz or 80 MHz switchable version available to special order
Output connector 50Ω SMA socket
Temperature stability
(15°C to 35°C)
1 to 16 GHz: <0.5dB
100 MHz to 18 GHz: <2dB
Time stability Typically <1dB over a 12 month period
Dimensions 76mm diameter × 64mm (74mm including connector) - CGE01C with battery pack
76mm diameter × 18mm (28mm including connector) - CGE01C without battery pack
76mm diameter × 92mm - CGE01R with battery pack
76mm diameter × 46mm - CGE01R without battery pack
Weight Approx 550g (including battery)
Power supply 5V 2AHr battery pack. External input 5.00V ± 0.25V, 300mA
Operating Time 6.5 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
CGE01KIT01
CGE01KIT01
Standard CGE01C comb generator emitter (conducted output) kit with battery charger
  • CGE01C conducted reference signal source
  • 80 & 100 MHz step size (switchable)
  • BP01 Rechargeable battery
  • Universal input battery charger
  • CAL13 Standard test
  • Hard case
CGE01KIT02
CGE01KIT02
Standard CGE01R comb generator emitter (radiated output) kit with integral monocone antenna and battery charger
  • CGE01R radiated reference signal source with integral antenna
  • 80 & 100 MHz step size (switchable)
  • BP01 Rechargeable battery pack
  • Universal input battery charger
  • CAL09 Standard test
  • Hard case
CGE01KIT03
CGE01KIT03
Enhanced CGE01C comb generator emitter (conducted output) kit with detachable monocone antenna and battery charger
  • CGE01C conducted reference signal source
  • 80 & 100 MHz step size (switchable)
  • MCN02 detachable monocone antenna optimised 1GHz - 26GHz
  • BP01 Rechargeable battery
  • Universal input battery charger
  • CAL13 Standard test
  • Hard case
CGE01KIT04
CGE01KIT04
Special CGE01C comb generator emitter with 50 & 80 MHz step size (conducted output) kit with battery charger
  • CGE01C conducted reference signal source
  • 50 & 80 MHz step size (switchable)
  • BP01 Rechargeable battery
  • Universal input battery charger
  • CAL13 Standard test
  • Hard case
CGE01KIT05
CGE01KIT05
Special CGE01R comb generator emitter with 50 & 80 MHz step size (radiated output) kit with integral monocone antenna and battery charger
  • CGE01R radiated reference signal source with integral antenna
  • 50 & 80 MHz step size (switchable)
  • BP01 Rechargeable battery pack
  • Universal input battery charger
  • CAL09 Standard test
  • Hard case
CGE01KIT06
CGE01KIT06
Enhanced, special CGE01C comb generator emitter with 50 & 80 MHz step size (conducted output) kit with detachable monocone antenna and battery charger
  • CGE01C conducted reference signal source
  • 50 & 80 MHz step size (switchable)
  • MCN02 detachable monocone antenna optimised 1GHz - 26GHz
  • BP01 Rechargeable battery
  • Universal input battery charger
  • CAL13 Standard test
  • Hard case

Accessories

Accessories
MCN02 Antenna Detachable monocone antenna optimised 1GHz - 26GHz
BP01 Battery Pack 5V 2AHr battery pack

Output Measurement Results

Output Measurement Results
CAL13 Direct Output 0 to 18GHz power measurement using spectrum analyser
CAL09 Radiated Output 1 to 18GHz electric field strength in FAR using a spectrum analyser at 1m

Typical Output Measurement Results

CGE01C - Direct Output Power - 80MHz Comb Spacing CGE01C - Direct Output Power - 100MHz Comb Spacing CGE01R - Integral Antenna Electric Field Strength - 3m - 80MHz Comb Spacing CGE01R - Integral Antenna Electric Field Strength - 3m - 100MHz Comb Spacing

Further details can be obtained from:

York EMC Services
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-Aug-01

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