What are good signal levels

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I Plan to Stick Around
Posts: 9

Re: What are good signal levels

Hitron model # CGN3AMR for above

Resident Expert
Resident Expert
Posts: 5,808

Re: What are good signal levels

Call tech support and ask the CSR to run a signal check on your modem.  It might pass, barely. All of your downstream levels are very low.  I believe the cut-off point for Rogers to dispatch a tech is -10 dBmV, but I don't know if that's a collective average, or if its the case when any of the downstream levels drop below -10 dBmV.  Those levels should be at 0 dBmV, with a signal to noise range of 36 to 40 dB.  The upstream range, with three or four operating channels is 36 to 40 dBmV.

 

Make sure that you advise the CSR if you are having any problems with any service, internet, cable TV or home phone.



I Plan to Stick Around
Posts: 9

Re: What are good signal levels

Thanks.

So the Signal strength download are low but Signal noise ok? For upstream both strength and noise are ok? Thanks
Resident Expert
Resident Expert
Posts: 5,808

Re: What are good signal levels

The downstream signal to noise ratios are ok.  The upstream signal levels should be slightly higher to be solidly in the 36 to 40 dBmV range. 

 

Those levels are a little odd, to say the least.  Usually as the external RG-6 cable ages, you end up with signal losses in both directions, so the downstream levels drop and the modem pushes up the upstream transmit levels to maintain comms with the CMTS.  So to see the downstream down so far, and the upstream nearly normal is a little unusual.  Make sure that the cable is tight at both the modem and wallplate and have a look at the levels again.  If no change, call tech support.



I Plan to Stick Around
Posts: 9

Re: What are good signal levels

Tech coming this week.

Thanks.
Resident Expert
Resident Expert
Posts: 5,808

Re: What are good signal levels

@Paul16, when the tech has completed the necessary work, can you repost the levels, just to see where they ended up.  Sometimes this takes more than one visit.



I Plan to Stick Around
Posts: 9

Re: What are good signal levels

Good idea.

I'm considering to put in bridge mode and use different router. Would that affect levels?

Guess could always take levels after tech comes but before put in bridge mode.

 

Wonder if they will be able to check why TV pauses split second sometimes... I'll ask but internet bigger issue.

Resident Expert
Resident Expert
Posts: 5,808

Re: What are good signal levels

There will be no effect on the signal levels. 

 

If you do run the modem in Bridge mode with a follow-on router, the modem login address changes to 192.168.100.1   Most of the time you can reach that address thru the router, but in some cases people have had to add a routing rule to the router in order to use that address.  It just depends on the router.  My Asus RT-AC68U doesn't require any additional rules to use that address.  Using 192.168.100.1 allows you to log into the modem with the router in place and check the signal levels, switch back to Gateway mode and initiate a factory reset if required. 

 

192.168.0.1 or 192.168.100.1 can be used with the modem is running in Gateway mode and you are directly connected to the modem.

 

TV pixelation or freezing is also an indication of poor signal levels.

 

Edit:  First address above corrected to read:  192.168.100.1



I Plan to Stick Around
Posts: 9

Re: What are good signal levels

Tech came and replaced splitter with a another bigger splitter that actually plugs into outlet.

 

Proof will be as we use internet.

 

Here are new levels:

 

Downstream Overview
Port IDFrequency (MHz)ModulationSignal strength (dBmV)Channel IDSignal noise ratio (dB)
1609000000256QAM-4.4003437.356
2363000000256QAM-2.9001037.636
3369000000256QAM-2.5001137.636
4375000000256QAM-2.9001237.636
5381000000256QAM-2.8001337.636
6387000000256QAM-3.5001437.356
7393000000256QAM-3.3001538.605
8399000000256QAM-3.4001637.636
9405000000256QAM-3.7001737.636
10411000000256QAM-3.6001837.356
11417000000256QAM-3.7001937.356
12423000000256QAM-3.7002037.636
13429000000256QAM-3.3002137.356
14435000000256QAM-3.3002237.636
15441000000256QAM-3.0002338.605
16447000000256QAM-3.0002437.636
17555000000256QAM-3.3002537.636
18561000000256QAM-3.3002637.356
19567000000256QAM-3.4002737.636
20573000000256QAM-3.5002837.636
21603000000256QAM-3.6003337.636
22357000000256QAM-2.300937.356
23615000000256QAM-4.0003537.356
24621000000256QAM-3.9003637.356
Upstream Overview
Port IDFrequency (MHz)ModulationSignal strength (dBmV)Channel IDBandWidth
123700000ATDMA - 64QAM36.25026400000
238596000ATDMA - 64QAM38.25033200000
330596000ATDMA - 64QAM37.50016400000
I Plan to Stick Around
Posts: 9

Re: What are good signal levels

Took again... not going in right directionSmiley Sad

 

Downstream Overview
Port IDFrequency (MHz)ModulationSignal strength (dBmV)Channel IDSignal noise ratio (dB)
1693000000256QAM-6.3004736.610
2363000000256QAM-2.9001037.636
3369000000256QAM-2.5001137.636
4375000000256QAM-2.8001237.356
5381000000256QAM-2.7001337.636
6387000000256QAM-3.5001437.636
7393000000256QAM-3.3001538.605
8399000000256QAM-3.4001637.636
9405000000256QAM-3.7001737.636
10411000000256QAM-3.6001837.356
11417000000256QAM-3.7001937.356
12423000000256QAM-3.7002037.356
13429000000256QAM-3.3002137.636
14435000000256QAM-3.3002237.636
15441000000256QAM-3.0002338.605
16447000000256QAM-3.0002437.636
17555000000256QAM-3.2002537.636
18561000000256QAM-3.3002637.636
19567000000256QAM-3.3002737.356
20573000000256QAM-3.5002837.636
21681000000256QAM-5.6004536.610
22687000000256QAM-5.9004636.610
23357000000256QAM-2.300937.356
24699000000256QAM-6.3004836.610
Upstream Overview
Port IDFrequency (MHz)ModulationSignal strength (dBmV)Channel IDBandWidth
123700000ATDMA - 64QAM36.25026400000
238596000ATDMA - 64QAM38.25033200000
330596000ATDMA - 64QAM37.75016400000
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