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PLC

@fewpb.net

STD, HRC, IRC

Hello, I purchase a new Samsung HDTV. in setting up to scan channels it asks what type of cable system I have.

options are

Analogue STD HRC IRC
Digital STD HRC IRC

I am supposed to pick one for each analogue and digital. Right now for Analogue I have picked STD and for Digital I picked IRC (because I read somewhere this is what to pick)

what do these setting stand for and what should I pick?

Thanks


jfgnet
12 Step Program
Premium,MVM
join:2001-02-14
Limbo

1 edit
STD = Standard
HRC = Harmonically Related Carriers
IRC = Incrementally Related Carriers

»www.jneuhaus.com/fccindex/cablech.html


cypherstream
Premium,MVM
join:2004-12-02
Reading, PA
kudos:3
reply to PLC
Use STD.

HRC and IRC are rarely used now adays.

HRC" is harmonically related carriers. "IRC" is incrementally related carriers. These are schemes that some cable systems use to reduce the visibility of beat products.

Beat products are distortions found in long amplifier cascades. Today fiber is driven to a node, and there's only perhaps 1-5 amplifiers past that. Back in the old days the whole system was RF, and a 50+ amplifier cascade was not unheard of!