Create your free account now! Sign up

Re: Hooking up Multiple TV's - TO 1FARMER

I was responding to kblman2020's response about loss in the splitter configuration for the modem. In the more advanced systems out there about 75% of the subs have return in one form or another( digital boxes, modems, VOD, telephony ) so band pass filters are not an answer everywhere. I would only advacate the use of a return amp in the most extreme cases but as I said it is an option to consider. Remember the FCC requires "0" at the back of the set, you have to take that into account when the splitter configuration is worked out to balance the levels in the home. example: you have 18dB leaving the tap at 859.25 (ch 135) then it goes through 100 feet of RG-6, then into an NIU with a video port, then to a 4-way splitter - 1 for the modem and 3 video, another 75 feet of RG-6 to the device at the end, 18dB(tap)-6dB(100' RG-6)-4-dB(NIU)-7dB(splitter)-4dB(75' RG-6)=-3dB, you just failed the FCC requirements. This scenerio is typical in most systems that offer advanced services and most of the homes in the system I'm in have more thatn 4 outlets.

> 1FARMER :
> Do you really think it's advisable to have someone with no RF experience hooking up an amp that amps return? So if he has noise coming from his drops in the house now his noise is 10db stronger!
> My suggestion is to use an amp that only amps forward. I suggest something like SA's SurgeGap amp. Put a 2 way splitter before the amp. if 3 way, feed your modem with the low loss leg (3.5), and main tv with one of the 7 db legs, and the amp (which will be pushing your other splitter/splitters) with the other 7 db leg. If you're going to take 1farmers advise and use the SV 10db bidirectional amp, stick high pass filters on the ports leading to your analog tvs. - for the noise guy's sake. The 10db amp is fine. SurgeGap amps have 15 db of gain each! In my opinion, thats WAY too much gain unless you're pushing 16 or so outlets. (I've seen it)
>
>
> > To overcome the loss for the modem in the return, SIGNAL VISION makes a amplifier that is a 10dB gain in both directions.
> >
> > > I would split the signal at the ground block with a 2-way splitter. Take 1 line directly to the modem. Take the other side to an 8-way and check reception. Try to find a good quality amplifier if needed. DO NOT amplify the modem side. This way would be best for your modem speed. Although not best for reception. Another way is to use an 8-way splitter. Most systems have 15db at the tap. If you lose 4db from the drop, depending on quality of cable and distance to the ground blk, you would have 11db left. An 8-way has a 11db loss. depending on your cable length to the tv's, you might have a satisfactory picture. The modem can work at a negative signal but might be slowed down going thru the 8-way. As someone else suggested, another drop would benifit you greatly. Hope this laid out your options for you.
> > >
> > > > Hi,
> > > > First off, I'm not a Cable Tv expert just a normal Joe.
> > > > What I want to do is hook up 7 TV's + 1 cable modem in my home with only one incoming analog cable line. I'm worried my signal will be so degraded from being split my picture quality will suck. Should I buy an amplifier or what do I need to keep my signal strong to each set. Is there a viagra for analog cable? Thanks!!!
> > > >
> > > > Jim
> > > > (-REDACTED-) (wave)
Never argue with an idiot, they will drag you down to their level and beat you with experience. Winston Churchill
This is CABL.com posting #71112. Tiny Link: cabl.co/msE8
Posted in reply to: Re: Hooking up Multiple TV's - What equip do I nee by 1FARMER
There is 1 reply to this message
Re: Multiple TV's - TO 1FARMER THANK U 1FARMER 5/8/2002 8:04:00 PM