A/V Extender Master Unit (KIT90S)
I have had similar problems with other products that connect to the DSTV decoder. The problem is caused by digital rights management signals on the output of the DSTV decoder that wreak havoc with items such as these. These DRM signals cause intentional DC offsets which bugger around with amplifiers/extenders and suchlike. These signals are generated by the DSTV decoder to prevent copying/recording. I used to have a whole article about stripping them away, online at one stage.
Date Added: 12/02/2014 by Sonic2k
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