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Author Topic: Extending Dolby Digital cable Matthew Taylor Expert Film Handler Posts: 186 From: Essex, UK Registered: Mar 2004 posted 08-01-2011 04:41 PM                     The Dolby Digital cable that connects my FP30 to a CP500 is quite short. I figured that I could extend it by using a standard 25-pin printer cable where the pins follow through exactly. The trouble is, it seems that the blocks aren't being read accurately and I get a 'F' reading all the time. Why would this be? Could it be because the cable isn't correctly shielded?  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 08-01-2011 04:58 PM                     Not just that...it isn't correct on many counts! Not in impedance, current carrying...and so forth. In the typical cheeseball DB25 extension cable you have some really small gauge wire (maybe 30awg) with an overall shield. In the Dolby reader cable, you have 22awg twisted pair cables (x4) with individual shields plus TWO overall shields (foil and braid). If you use the real stuff (Belden 8164) , you can go hundreds of feet. I'm sure someone in the UK, like Bell can get you what you need and it will work. -Steve  |  IP: Logged Matthew Taylor Expert Film Handler Posts: 186 From: Essex, UK Registered: Mar 2004 posted 08-01-2011 05:20 PM                     Thanks Steve, that definitely makes sense. I'll get some decent cable.  |  IP: Logged

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