[mythtv-users] HDTV antenna quandry
beww at beww.org
Wed Apr 25 15:05:03 UTC 2007
Boleslaw Ciesielski wrote:
> Rich Osman wrote:
>> The splitter will add loss, a two-way
>> splitter is half the signal level even when used as a combiner.
> Is this really true? I thought that say a 2-way splitter has a
> "theoretical" loss of 3dB (half the signal) plus an "imperfection" loss
> of 0.5-1dB for a total loss of 3.5-4dB on each leg. When used as a
> combiner the theoretical part of the loss would not apply, leaving only
> the 0.5-1dB loss which is much less than half a signal. Is this incorrect?
It's more or less correct, at least as an approximation, and assuming
that phasing effects can be ignored.
Obviously if the signals are out-of-phase you could wind up with
absolutely nothing, minus the insertion loss.
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