4 Pair Multipair Cable

[grizzly]

To qualify the point about using twisted multipair cable for audio in broadcast installations, the cable used looks like typical "telephone cable", but does have an overall screen. The best known type was supplied by Canford under the identifying name of PSNxx, where the xx signified the number of cores (not pairs) - a bit daft, but that's the standard.

PSN has now been replaced by the KSM range.

http://www.canford.co.uk/ProductResources/ig/2273.pdf

 

Gareth.

 

PSNxx isn't the only type used, though.

In a situation where the cable will or might be used for mic level signals, you will find that PINxx is used instead, which has a screen around each individual pair. This is now Canford KHJ: Canford KHJ

[Bobbsy]

PSNxx isn't the only type used, though.

In a situation where the cable will or might be used for mic level signals, you will find that PINxx is used instead, which has a screen around each individual pair. This is now Canford KHJ: Canford KHJ

 

Very true, though it's fair to say that, at least in any of the installations I worked on, runs of mic level signal were kept to an absolute minimum. All distribution around the building was obviously done at line level and, even in the studios, runs from wall boxes into the sound control were kept as short as possible--and well away from other cable routes. They tended to come direct to a dedicated mic level patchfield (separate from line level stuff) and from there into mic pre-amps/sound mixers to get it up to line level.

 

From memory, the last big install I did had something like 40km of PSN (or PSN equivalent) but only a few hundred metres of mic level multicore.

 

Bob