A Reference Noise Source with a Comb Output Characteristic Generating Emissions up to 26 GHz - York EMC Services Ltd

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A Reference Noise Source with a Comb Output Characteristic Generating Emissions up to 26 GHz

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Comb Generator Emitter 02

The Comb Generator Emitter 02 (CGE02) is a compact, battery-powered, reference signal source that generates a broadband radiated and/or conducted output up to 26 GHz. When used as a verification reference source, the known output allows unknowns within systems or components to be measured or calculated. The compact size allows small enclosures to be evaluated when used as a reference source for shielding effectiveness measurements.

The CGE02 can be supplied with a 50 Ω SMA output connector (CGE02C) for direct connection to conducted test systems, or to an external antenna in order to generate test fields for evaluating radiated emission test systems. Alternatively, to achieve the best repeatability and compactness for purely radiated applications, the CGE02 can be supplied with an integrated antenna (CGE02R).

The CGE02 harmonic steps can be switched between 250 MHz and 256 MHz as standard, allowing more frequency points to be measured than is possible with a fixed-frequency source.

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Features

 
Stable output •  Repeatable measurements
Conducted and radiated options •  Evaluation of both conducted and radiated systems
250 MHz to 26 GHz output •  Applications across a broad 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 cables affecting measurements

Applications

  • Shielding effectiveness of small enclosures e.g. PCs, servers, wireless communications equipment
  • Radiated measurement systems validation and verification
  • Reference source for:
    • Daily pre-test verification checks if required by the accreditation authorities 
    • Long-term performance monitoring
    • Spectrum analyser / receiver pre-checks
  • Investigation of reverberation (mode stirred) chamber behaviour
  • Characterisation of filter performance
  • Cable loss measurements
  • Inter-laboratory test programs
  • Proficiency test programs

Specifications

 
Frequency Range •  250 MHz to 26 GHz direct connection into a 50 Ω system
  •  1 GHz to 26 GHz radiated using the integral antenna (CGE02R)
      or additional monocine antenna (CGE02C)
Step Size •  250 MHz or 256 MHz switchable
Output connector •  50 Ω SMA socket (CGE02C only)
Temperature stability •  <1 dB, at an ambient temperature of 15 °C to 35 °C
Time stability •  Typically <1 dB over a 12 month period
Dimensions •  CGE02C with battery pack - 76 mm diameter × 64 mm (74 mm inc. connector) 
  •  CGE02C without battery pack - 76 mm diameter × 18 mm (28 mm inc. connector) 
  •  CGE02R with battery pack - 76 mm diameter × 92 mm 
  •  CGE02R without battery pack - 76 mm diameter × 46 mm 
Weight •  Approx 550 g (including battery)
Power supply •  5 V 2 AHr battery pack. External input 5.00 V ± 0.25 V, 300 mA
Operating Time •  6.5 hours typical with a fully charged battery pack
Indicators •  Mode 1; 256 MHz steps. Mode 2; 250 MHz steps, incorrect power supply voltage

 

Standard Kits: 250MHz & 256MHz switchable comb step size

Part Number

Description

Parts included

CGE02KIT01 Standard CGE02C comb generator  CGE02C comb generator emitter with 
  emitter (conducted output) kit   SMA output connector
     CAL14 - conducted output power 
      measurement, 0 GHz to 26 GHz
       
CGE02KIT02 Standard CGE02R comb generator  CGE02R comb generator emitter 
  emitter (radiated output) kit   with integral antenna
    CAL10 - radiated electric field strength
      strength measurement, at 3 m in a FAR, 1 GHz to 26 GHz
       
CGE02KIT03 Enhanced CGE02C comb generator  CGE02C  comb generator emitter with
  emitter (conducted and radiated output) kit   SMA output connector
     MCN02 detachable monocone antenna
    •  CAL14 - conducted output power
          measurement, 0 GHz to 26 GHz

All kits are supplied with:

BP01 5 V 2 AHr rechargeable battery pack, BCH04 universal input battery charger, hard case, manual.

Accessories:

MCN02 • Detachable monocone antenna (1 GHz to 26 GHz optimum used with CGE02C)
BP01 • 5 V 2 A Hr detachable battery pack

 

Manufacturer's Calibrations

CAL14 Conducted output power, 0 GHz to 26 GHz
  measured using a spectrum analyser (CGE02C only)
CAL10    Radiated field strength, 1 GHz to 26 GHz
  measured at 3 m in a FAR using a spectrum analyser
  (CGE02R or CGE02C with monocone antenna only)

Typical Output Measurement Results

0o is in line with the indicator on the CGE