Wegener Communications DVR396, DVR395 manual Ferrite Installation, Connector Ferrite Size

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installations, but especially in multi-service environments, should use high-quality shielded cables, with the shield grounded according to good engineering standards.

1.4.1.2Ferrite Installation

For this installation, there are three ferrites that are larger than the others. These should be used for the cables numbered 6, 7, and 8 in the list below. These are the relay cables, the video cable, and the S-Video cable. The other five cables will normally have a smaller total diameter, and should fit into the smaller ferrites.

These ferrites must be installed on cables attached to the following connectors:

	Connector		Ferrite Size
1.	Audio 1 Left		Small
2.	Audio 1	Right	Small
3.	Audio 2	Left	Small
4.	Audio 2	Right	Small
5.	Serial Port		Small
6.	Alarm and Closure Relays.		Large
	One ferrite for all wires to relays.
7.	Video		Large
8.	S-Video		Large

The cables must pass through the ferrite and then loop around and pass through again. See Figure 1 (Page 11). For proper results, the core should be positioned on the cable as close to the chassis connector as possible. With minimal slack in the loop, the wiring alone should properly support the core. No additional support should be necessary.

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