[mythtv-users] Understanding HD Antennas ( was HDHomeRun and jumpy video)

George Mari george_mythusers at mari1938.org
Sun Sep 16 20:14:43 UTC 2007

Jon Boehm wrote:
> How does reducing the input level sometimes help things?  It seams to me 
> that I'm STUCK with noise that is on the line.  Once noise gets into the 
> signal its impossible to get out.  When you attenuate the signal the 
> noise get promotionally attenuated giving the same signal-to-noise 
> ratio.  And again, amplifying the signal proportionally amplifys the 
> noise again giving the same signal-to-noise ratio. So how to attenuator 
> and amps help in noise situations?
Over on avsforum.com, they recommend quad-shielded RG-6 cable to keep 
unwanted interference out between the antenna and tuner.  Even 
dual-shielded RG-6 is stated as being susceptible to interference. 
Worse still is RG-59.

None of this is from personal experience, just my research.

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