First, Only the Amplifier can raise signal
2. An Equalizer(EQ) attenuates the Lowest forward freqency equal the the value of the eq. For instance a 21db EQ will attenuate channel 2 21db. Ch3 will attenuate slightly less ch4 less and so on until you have reached the highest channel that the Eq is designed for (450mhz,550mhz,750mhz and the like). At the highest channel the EQ should attentuate near 0. Understanding this, then a mid channel loss should be half of the value of the EQ's face value. So if you have a 550mhz Eq 550 =channel 78 is at 550mhz, ch 36 is about halfway and ch 2 is the bottom with a 21db EQ. Ch 78 will be down 0 db, ch36 will be down 10.5db and 2 will be down 21db. HOWEVER! Often you will be forced to use EQs that do not match the bandwith of your system such as using 750mhz eq's in a 625mhz system. You will then see movment on your high channel because of were ch 91 falls in a 118 channel system. You'll have to adjust using an output pad. If you adjust using your input pd you could begin to encroach on your noise floor and cause distortions. Remember to Pad for input and Equalize output. Some mentioned Cable Simulators....They are used if two amps are too close for rolloff to occur. This could happen if for instance there would be a couple of splitters or DC's inline which caused the levels to need amping but now you tilt is too large and now way to lower it.
Re: what does a eq do
Member #: 39257
Registered: 7/12/2005
Posted:
43
Name:
Chuck Jones
Name:
Chuck Jones
Company:
GCJJ Splicing &Technacal
Occupation:
Cable Guy
Location:
Anchorage Alaska
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