Here in Las Vegas the method is a "guess-timate" but fairly accurate (within 1 or 2 db).
Start by adding +20 to your tap value.
Add +1 for each tap headed back to the Amp/LE.
Add +1 for the UG to the D-Mark.
Add +1 for the home-run from the outlet/wallplate to D-Mark.
Now add +(x) for your splitter at D-Mark.
Example: 4-port 8-value tap with only 3 other taps between it and the amp. 4-prewires in the house.
Tap: 8 + 20 = 28 ... now add in the 4 lengths of .500 between your tap and the amp (remember there are 3 other taps between your 8-value and the amp)..... 28+4=32
32 + 1 ( lateral to D/M) = 33
33 + 1 (homerun from D/M to outlet) = 34
34 + 7 (4-way splitter at D/M (-7db insertion loss) = 41
Remember..... Return path is effected equally by a splitter as the forward signal.
So with the above example.... If I have to keep a modem return path less than 50.... using a 4-way splitter at D-Mark is fine. Plenty of room for D/M configuration. Again.... The above example will get you in the ballpark. You can expect your modem return path to be approximatly 41.
The same scenerio with a 20-value tap will force you to use a 2-way feeding into a 3-way at D-Mark to keep the Modem Homerun under 50 (apx 49 on the return). More info in my next post below.
Re: Need to come up with 10 Questions
Member #: 35888
Registered: 2/1/2005
Posted:
1013
Occupation:
Poor Driven Cable Worker
Location:
Planet Earth
There is 1 reply to this message
