For ground isolation in video and data transmission systems. Input and output impedances are insulated from ground and from each other. These devices discriminate against false voltages resulting from the flow of undesired currents between the LO sides of the source and a remote load Major objective in their use are:

	Removal of "humbars" or other interference in Broadcast, Telecommunications and CCTV applications
	Eliminate interference due to differences in ground potential or induced common-mode noise cost effectively

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A comprehensive tutorial on isolation video transformers can be found in Application Note 153: Ground Isolation in Video Transmission and Application Note 157: Ground Isolation when the Video Feed has a DC component

• TV Humstoppers
  DC-isolated "Humstoppers" for power-line isolation.



• TV Humbuckers
  DC-coupled "Humbuckers" for elimination of common mode noise

North Hills now manufactures RoHS compliant versions of our Wideband Transformers. To order a RoHS compliant Wideband Transformer simply add the letters LF at the end of the model number.

For example:  North Hills balun transformer 1117CC-LF is a RoHS compliant product.

Application Notes:

• 153. Ground Isolation in Video Transmission
• 158. Ground Isolation when the Video Feed has a DC Component

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