Out of all of the replies, Cableho hit the nail on the head. If a DC 12 is installed on an auxillary leg, the coorisponding tap after that will have a much lower value. It is necessary a DC 12 on the return match the DC 12 on the forward. Remember the optimal input for any reverse amplifier in the gainmaker is 17 db.
For instance if you have a DC 12 off of the auxilliary port of a gainmaker, your next tap will probably be 11 or 14 db, depending on system design.
Think about it ? If you were to put a 0 pad on the input of the auxillary leg, 0 (pad) + 11 (tap) + 17 (return input) + (3.5 internal combiner ) = 31.5 add a 50ft drop and a two way, your modem only needs to transmit at about 35 db to hit the CMTS at the headend with 0 . Now put a 12 pad in its place you just made the modem transmit at 47. The object is to have all legs balanced the same. and transmit well above the noise floor. A 1 pad will be installed on the other aux leg (.9 bd insertion loss for a DC12). The same holds true for a DC8 or two way .
Hope this helps out
Teched out :
Re: Gainmaker Reverse
Member #: 37616
Registered: 4/22/2005
Posted:
2
Occupation:
Maintenance Lead Technician
Location:
Georgia
There are 0 replies to this message
