CGE02 - Comb Generator Emitter

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Other Instrumentation:

Other Comb Generator Emitters:
- CGE01, CGE03
Comparison Noise Emitters:
- CNE III, CNE V, CNE V+
Active Receive Antenna
Harmonics & Flicker Generator
Cable Coupling Clamp

A harmonic spectrum reference signal source with a comb output characteristic generating radiated and conducted emissions up to 26GHz with 250 or 256MHz step size options.

Stable output: Repeatable measurements
Conducted and radiated output options: Evaluation of both conducted and radiated systems
250 MHz to 26 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 CGE02 is a broadband comb generator emitter with a class leading useable output from 250MHz to 26GHz. 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

Available either with an integral monocone antenna or with a detachable monocone antenna the CGE02 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 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 CGE02 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 CGE02C 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

Shielding effectiveness of small enclosures:
- Desktop PCs
- Servers
- Wireless comms equipment
Radiated measurement systems validation and verification
Reference source for:
- Daily pre-test
- Long-term performance monitoring
- Spectrum analyser / receiver pre-check
Investigation of reverberation (mode stirred) chamber behaviour
Characterisation of filter performance
Cable loss measurements
Measuring amplifier gain and bandwidth

Specifications

Specifications
Frequency Range	250 MHz to 26 GHz direct connection into a 50Ω system
Frequency Range	250 MHz to 26 GHz radiated using an integral antenna
Step Size	250 MHz or 256 MHz switchable
Output connector	50Ω SMA socket
Temperature stability	15°C to 35°C <1dB
Time stability	Typically <1dB over a 12 month period
Dimensions	76mm diameter × 64mm (74mm including connector) - CGE02C with battery pack
	76mm diameter × 18mm (28mm including connector) - CGE02C without battery pack
	76mm diameter × 92mm - CGE02R with battery pack
	76mm diameter × 46mm - CGE02R 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
Indicators	Active, higher step size - red LED

Standard Order Kits

Part Number	Description	Parts Included
CGE02KIT01	Standard CGE02C comb generator emitter (conducted output) kit with battery charger	CGE02C conducted reference signal source BP01 Rechargeable battery Universal input battery charger CAL14 Standard test Hard case
CGE02KIT02	Standard CGE02R comb generator emitter (radiated output) kit with integral monocone antenna and battery charger	CGE02R radiated reference signal source with integral antenna BP01 Rechargeable battery pack Universal input battery charger CAL10 Standard test Hard case
CGE02KIT03	Enhanced CGE02C comb generator emitter (conducted output) kit with detachable monocone antenna and battery charger	CGE02C conducted reference signal source MCN01 detachable monocone antenna optimised 1GHz - 26GHz BP01 Rechargeable battery Universal input battery charger CAL14 Standard test Hard case

Accessories

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

Output Measurement Results

Output Measurement Results
CAL10	Radiated Output	1 to 26GHz electric field strength in FAR using a spectrum analyser at 1m
CAL14	Direct Output	0 to 26GHz power measurement using spectrum analyser

Typical Output Measurement Results

Output plot of CGE02C - Direct Output Power - 250MHz Comb Spacing

Output plot of CGE02C - Direct Output Power - 256MHz Comb Spacing

Output plot of CGE02R - Integral Antenna Electric Field Strength - 3m - 250MHz Comb Spacing 1 - 18GHz

Output plot of CGE02R - Integral Antenna Electric Field Strength @ 3m - 250MHz Comb Spacing 18 - 26GHz

Output plot of CGE02R - Integral Antenna Electric Field Strength @ 3m - 256MHz Comb Spacing 1 - 18GHz

Output plot of CGE02R - Integral Antenna Electric Field Strength - 3m - 256MHz Comb Spacing 18 - 26GHz

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: 2009-May-13

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