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AC-CISPR200M Absorption Clamp


  • 30 MHz - 200 MHz Frequency Range
  • Calibration Clamp for CMAD
  • With 4 mm diameter openings
  • This calibration fixture is designed according to CISPR 16-1-4 sections 9.5 and 9.6

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Test Equipment Description

The AC-CISPR200M Absorption Clamp consists of many precision cut ferrite half-toroids, embedded in a grey plastic housing. The unique floating toroid bearing ensures a perfect fit of the ferrite surfaces. Two quick-locks at the long side allow opening and closing of the clamp within seconds. Cable bundles or coaxial cables with a maximum diameter of 26 mm are accepted by the clamp without disassembling connectors or interrupting any circuitry. The combination of short length and large cable hole diameter offers a broad variety of applications for the AC-CISPR200M. Each common mode absorption device comes with an individually measured calibration certificate.


The AC-CISPR200M can be used for both, coaxial cables and unshielded cable bundles, to suppress unwanted common mode currents (also called braid currents). Since these unwanted common mode currents are very often a reason for poor repeatability of measurements, the new CISPR 16-1-4 standard recommends the use of absorbing clamps.


The AC-CISPR200M can be calibrated with the optionally available "AC-CISPR200M CAL KIT" calibration se as described in CISPR 16-1-4. The procedure is described in detail in the data sheet of the calibration adapter.

Frequency Range30 MHz - 200 MHz
Specified inCISPR 16-1-4
Useable Frequency Range10 MHz - 1 GHz
S11 (30 MHz)0.6 - 0.75
S11 (200 MHz)0.4 - 0.55
S21S11 (200 MHz):
S21< 0.25
Max. Cable Diameter26 mm
Housing MaterialPVC
Housing Dimensions66 x 70 x 414 mm
Weight3.2 kg

S11 measured acc. CISPR 16-1-4 Section 9.5

S21 measured acc. CISPR 16-1-4 Section 9.6

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