I updated my internet yesterday to the new 250 bundle and installed the hitron modem.
The problem i have is with the modem hooked up my cable TV box (small SD one for basic cable) dies. There is some sort of bandwith conflict i am guessing, if i disconnect the internet cable modem the cable TV start working again for the box.
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There would be no difference between your old modem and the new modem in terms of the signal levels if the cabling is ok. The first thing that comes to mind is to check the RG-6 cable that connects to the modem. Have a look at the end connector and ensure that the copper center core is straight and will not bend towards the outer connector that screws into the modem. If it does, it will ground out the copper conductor, dropping your signal levels to nothing. So, ensure that the center copper conductor remains straight as the cable is connected to the modem.
With the cable connected, log into the modem, navigate to the STATUS .... DOCSIS WAN page, copy the downstream and upstream tables and paste them into this thread. Those are the cable signal levels and signal to noise ratios, which will show if there is a cable signal problem.
Anything is possible when it comes to electronic equipment. With that in mind, and with everything connected, can you log into the modem, navigate to the STATUS .... DOCSIS WAN page, copy the downstream and upstream tables and paste them into this thread. At this point I'm curious as to what those levels might show. Are you using a 2 port splitter which has -3.5 indicated on both output ports?
If you have 4 modems, ie, home phone, cable TV, Internet, then a 4 port splitter might make sense. If you look at the splitter, the output ports will be marked, most likely -7.5, as in -7.5 dB drop from the input signal level. If you have enough signal excess above 0 dBmV to start with, that -7,5 dB drop might not be a problem, but if your signal level to start with is below 0 dBmV, then you could run into issues with the internet modem. This is where creativity on the tech's part comes into play, either change the external cable and connectors to bring the signal levels up to where they should be, or, use a combination of splitters to drop the level to the internet modem by the least amount possible, or a combination of both. If you only have two modems in use, then you should switch to a two port splitter as the drop on that splitter is only -3.5 dB. In general, you usually match the number of modems to the number of ports on the splitters, with a little creativity thrown in. You don't want to leave ports unused, as that usually means that the splitter has more ports than you need and it will drop the signal levels more than is normally desired.