@DaveFro your downstream signal levels are low and unfortunately, still in the -10 to 10 dBmV range that Rogers uses as the cut-off points. Anything outside of those ranges and you can expect a tech visit. Just to see what might happen, call tech support and ask the CSR to run a signal check on the modem and to check the upstream signal to noise ratios and noise history to see if anything comes up. If you're seeing problems with any other service, cable, Home Phone etc, please let the CSR know. It can't hurt to call in and see what comes out of the conversation.
@Hucklebury those levels aren't too bad. Just one oddball down at -6 dBmV on the downstream side, but other than that , they're not bad. Everything operating as it should?
@Datalink I didn't call, but i did hook the line up to a signal aplifier, and 2 splitters (to reduce the signal) and now my levels look awesome, but the speed hasn't really gone back to what it was when i first got the service (930/50). And it still doesn't explain why my signals got worse, it is just determined by what is coming into the house, isn't it?
Downstream Overview
| Port ID | Frequency (MHz) | Modulation | Signal strength (dBmV) | Channel ID | Signal noise ratio (dB) |
| 1 | 615000000 | 256QAM | 2.000 | 35 | 38.605 |
| 2 | 363000000 | 256QAM | 1.300 | 10 | 36.387 |
| 3 | 369000000 | 256QAM | 1.200 | 11 | 36.610 |
| 4 | 375000000 | 256QAM | 0.700 | 12 | 36.387 |
| 5 | 381000000 | 256QAM | 1.000 | 13 | 36.387 |
| 6 | 387000000 | 256QAM | 1.600 | 14 | 36.387 |
| 7 | 393000000 | 256QAM | 1.400 | 15 | 36.387 |
| 8 | 399000000 | 256QAM | 1.600 | 16 | 36.610 |
| 9 | 405000000 | 256QAM | 1.700 | 17 | 36.387 |
| 10 | 411000000 | 256QAM | 1.800 | 18 | 36.610 |
| 11 | 417000000 | 256QAM | 2.300 | 19 | 36.610 |
| 12 | 423000000 | 256QAM | 2.100 | 20 | 36.610 |
| 13 | 429000000 | 256QAM | 2.600 | 21 | 37.356 |
| 14 | 435000000 | 256QAM | 2.400 | 22 | 36.610 |
| 15 | 441000000 | 256QAM | 2.300 | 23 | 37.356 |
| 16 | 447000000 | 256QAM | 2.300 | 24 | 37.356 |
| 17 | 555000000 | 256QAM | 1.900 | 25 | 37.636 |
| 18 | 561000000 | 256QAM | 1.100 | 26 | 37.636 |
| 19 | 567000000 | 256QAM | 1.600 | 27 | 37.636 |
| 20 | 573000000 | 256QAM | 1.600 | 28 | 38.605 |
| 21 | 579000000 | 256QAM | 1.100 | 29 | 37.636 |
| 22 | 585000000 | 256QAM | 1.400 | 30 | 37.636 |
| 23 | 591000000 | 256QAM | 1.500 | 31 | 38.983 |
| 24 | 597000000 | 256QAM | 2.000 | 32 | 38.605 |
| 25 | 603000000 | 256QAM | 2.400 | 33 | 38.605 |
| 26 | 609000000 | 256QAM | 1.700 | 34 | 37.636 |
| 27 | 357000000 | 256QAM | 1.700 | 9 | 36.387 |
| 28 | 621000000 | 256QAM | 2.200 | 36 | 37.636 |
| 29 | 633000000 | 256QAM | 2.000 | 37 | 37.636 |
| 30 | 639000000 | 256QAM | 1.300 | 38 | 37.636 |
| 31 | 645000000 | 256QAM | 1.200 | 39 | 37.356 |
| 32 | 651000000 | 256QAM | 1.000 | 40 | 37.636 |
OFDM Downstream Overview
| Receiver | FFT type | Subcarr 0 Frequency(MHz) | PLC locked | NCP locked | MDC1 locked | PLC power(dBmv) |
| 0 | NA | NA | NO | NO | NO | NA |
| 1 | NA | NA | NO | NO | NO | NA |
Upstream Overview
| Port ID | Frequency (MHz) | Modulation | Signal strength (dBmV) | Channel ID | Bandwidth |
| 1 | 30596000 | ATDMA - 64QAM | 45.250 | 1 | 6400000 |
| 2 | 38595707 | ATDMA - 64QAM | 49.250 | 3 | 3200000 |
| 3 | 23700000 | ATDMA - 64QAM | 43.500 | 2 | 6400000 |
OFDM/OFDMA Overview
| Channel Index | State | lin Digital Att | Digital Att | BW (sc's*fft) | Report Power | Report Power1_6 | FFT Size |
| 0 | DISABLED | 0.5000 | 0.0000 | 0.0000 | -inf | -1.0000 | 4K |
| 1 | DISABLED | 0.5000 | 0.0000 | 0.0000 | -inf | -1.0000 | 4K |
@DaveFro, at the end of the day, your signal levels at each device are a result of the initial level at the house entry point, minus any losses for splitters. The goal is to reduce that loss as much as possible, so, this is where the tech will get creative, determining if that is best done by use of a single splitter, or single amp, or a combination of the two. I don't remember if you have a line amp which amplifies everything, or a VOIP amp which has a passive path thru the amp for VOIP and Internet use and amplified ports for everything else.
When you have time, can you describe the cable network, including the amp type, and losses as indicated on the splitters, ie: -3.5, -7? There may be a better way to do the same with a single amp or splitter and achieve fewer losses enroute to all of the devices.
The important question in all of this is what is the original signal level when it enters the house, prior to any amps or splitters. You can actually measure that by moving the internet modem to that cable for a couple of minutes so that you can determine what those levels are. That would give you an idea of how much of a drop you would want at the internet modem, after the amp and any splitters.
Your present signal levels aren't too bad. You have one high upstream level that you should keep an eye on. If that moves up to 51/52 dBmV, expect to see one upstream channel shut down so that the other two channels have enough power to reach the CMTS. If and when that happens you will notice slower data rates. At that point it will be time to call in a tech.
@DaveFro, can you remind me, that amplifier is a single line in, single line out +15dB amp? If so, that will be part of the problem, possibly generating packet losses experienced by the Internet modem.
So, if the line level for the incoming cable is +6 dBmV, then you should have enough signal power to split that to all devices and from what I remember, the cables don't all terminate in one location correct? Therefore you need to feed one cable that is split further down. Am I remembering that correctly?
With +6 dBmV, if the cables all terminated in one location, then a splitter with 3 ports would allow you to use the -3.5 dB port for the internet, and the -7 dB ports for anything else. A four port splitter drops the levels by approx 7 dB, 6 port drops 9 dB, 8 port drops 11 dB.
So there may be other ways to do the same thing but end up with better internet performance. The starting point is that amplifier, and determining if it can be replaced with a different amp, or one single splitter.
You should consider calling tech support to see if you can get a tech out to your home to rework the amp and splitters. I don't believe that there would be any cost but ask the question. If nothing else, the tech might take one look at it and come to the conclusion that there is nothing to do, but I don't believe that.
Yup, I would leave the amplifier out of the system. The modem can live with -7 dBmV. I would use a two port splitter and if you see any issues with either the internet modem or tv at any time, call tech support to run a signal check on the modem and go from there. The ideal action would be to have a tech check the external connectors and replace them and look for any other issues that might be causing the entry signal level to come in at -3 dBmV or so. Ideally that should be around +3 dBmV so that by the time you run through any splitters and cabling, you end up around 0 dBmV at the modems. Let the field tech clean up any external issues that migh exist.
@Hucklebury, try this. Check your 5 Ghz channel that is currently set in the modem. Set that to run channel 149 or higher as the power output for those channels is 1 watt versus 50 or 200 milli-watts for the lower 5 Ghz channels. While you are there, disable the WPS for both 2.4 and 5 Ghz channels as WPS is no longer secure.
The 2.4 Ghz network might be tougher solve, if not impossible.
Have a look at your wifi environment with one or more of the following applications.
http://www.techspot.com/downloads/5936-inssider.html
https://www.acrylicwifi.com/en/wlan-software/wlan-scanner-acrylic-wifi-free/
http://www.nirsoft.net/utils/wifi_information_view.html
Load one or more of these on a laptop and see who you're competing with for clear channels. The 5 Ghz shouldn't be too bad for finding a clear channel. The 2.4 Ghz, because of its longer range might be filled with numerous networks, and therefore very difficult to work in.
inSSIDer and Acrylic are graphical, WifiInfoView is text only. That link for inSSIDer is the for the last freebie version which doesn't properly display the 802.11ac networks in the 5 Ghz band. Newer licenced versions will display the 802.11ac network properly. Last time I looked the licenced version was $20 US. Definitely worth the cost of you use 5 Ghz networks. Both Acrylic and WifiInfoView display the 802.11ac networks from what I've read.
Fwiw, the Hitron modems have never been noted for stellar performance when it comes to wifi. For anyone who really relies on wifi, by usual advice is to run the modem in Bridge mode with a good wifi router behind it. That router should have external antenna for better performance.
So, have a look at the wifi environment and see if you can make any adjustments to the channels that the modem is operating on. Hopefully that might give you better performance with the Pixel and Pixel XL.
-
161511 views
-
51 Likes
-
-
