What are good signal levels

[s1lva166]

Hi everyone!

I'm currently on the Hybrid Fibre 150 package and I'm using the Hitron CGN3ROG modem/router. I was wondering what are good downstream and upstream signal ratios? If someone could provide a range that would be great. I'm also wondering what were the best signals you have seen coming from the router? Here is a screen shot of my current signals:

Downstream:
http://snag.gy/lVf3P.jpg

Upstream:

http://snag.gy/UOm2F.jpg

Thanks!

***edited labels***

[anyad]

Very interesting. I just ran it and yes for some reason the upload is a consistent 20MBit regardless of what result I get for downstream.

So I ran a test late night and today at 11:00AM as well.

FibreStream Toronto server via Ookla - Downstream (starts at 500 then drops sharply) 98Mb // 21 Mbit Upstream

Rogers Toronto - 600MBit Downstream // 21 Mbit upstream

Any other Toronto servers that are non Rogers will also get sub 100 levels. I mean I get the Rogers server must be "closer" but 500mbits of difference?

There is no pattern to it, results seem to be consistent regardless of time of day.

Cheers,

[automaton]

Have to reboot modem once a week

I have a Rogers CGN3ACR modem with the following information:

Hardware Version	1A
Software Version	4.5.8.35T3

Downstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Signal noise ratio (dB)
1	639000000	256QAM	7.500	14	38.605
2	579000000	256QAM	4.700	5	38.605
3	585000000	256QAM	4.800	6	38.983
4	591000000	256QAM	4.400	7	38.605
5	597000000	256QAM	4.200	8	38.605
6	603000000	256QAM	4.800	9	37.636
7	609000000	256QAM	5.700	10	38.605
8	615000000	256QAM	6.600	11	38.605
9	621000000	256QAM	6.800	12	38.983
10	633000000	256QAM	6.900	13	38.983
11	303000000	256QAM	-0.200	1	36.610
12	645000000	256QAM	8.000	15	38.983
13	651000000	256QAM	8.700	16	38.983
14	657000000	256QAM	9.500	17	40.366
15	663000000	256QAM	9.500	18	40.366
16	669000000	256QAM	9.500	19	38.983
17	675000000	256QAM	9.300	20	38.605
18	681000000	256QAM	9.100	21	38.983
19	687000000	256QAM	9.500	22	38.983
20	693000000	256QAM	9.900	23	40.366
21	699000000	256QAM	10.200	24	40.366
22	705000000	256QAM	10.100	25	40.366
23	711000000	256QAM	9.800	26	38.983
24	717000000	256QAM	9.600	27	40.366

Upstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Bandwidth
1	30596000	ATDMA - 64QAM	43.750	1	6400000
2	38596000	ATDMA - 64QAM	45.500	3	3200000
3	23700000	ATDMA - 64QAM	43.250	2	6400000

Basically once every 5-7 days the internet becomes incredibly slow and attempting to access the web interface of the modem won't be possible (it will never finish loading the login page). At this point, the only solution is to reboot the modem manually (power cycle), and immediately after it becomes very fast again.

I have no internal router (I'm using the modem's router with both 5GHz and 2.4GHz WiFi on), and I am not running anything during this time that is taking bandwidth (no torrents or anything). Regular usage is typical web usage, YouTube streaming, and PS4 gaming. My PS4 does have some other connection problems at times, but I will post seperately about this.

[gp-se]

---

@automaton wrote:

Have to reboot modem once a week

I have a Rogers CGN3ACR modem with the following information:

Hardware Version	1A
Software Version	4.5.8.35T3

Downstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Signal noise ratio (dB)
1	639000000	256QAM	7.500	14	38.605
2	579000000	256QAM	4.700	5	38.605
3	585000000	256QAM	4.800	6	38.983
4	591000000	256QAM	4.400	7	38.605
5	597000000	256QAM	4.200	8	38.605
6	603000000	256QAM	4.800	9	37.636
7	609000000	256QAM	5.700	10	38.605
8	615000000	256QAM	6.600	11	38.605
9	621000000	256QAM	6.800	12	38.983
10	633000000	256QAM	6.900	13	38.983
11	303000000	256QAM	-0.200	1	36.610
12	645000000	256QAM	8.000	15	38.983
13	651000000	256QAM	8.700	16	38.983
14	657000000	256QAM	9.500	17	40.366
15	663000000	256QAM	9.500	18	40.366
16	669000000	256QAM	9.500	19	38.983
17	675000000	256QAM	9.300	20	38.605
18	681000000	256QAM	9.100	21	38.983
19	687000000	256QAM	9.500	22	38.983
20	693000000	256QAM	9.900	23	40.366
21	699000000	256QAM	10.200	24	40.366
22	705000000	256QAM	10.100	25	40.366
23	711000000	256QAM	9.800	26	38.983
24	717000000	256QAM	9.600	27	40.366

Upstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Bandwidth
1	30596000	ATDMA - 64QAM	43.750	1	6400000
2	38596000	ATDMA - 64QAM	45.500	3	3200000
3	23700000	ATDMA - 64QAM	43.250	2	6400000

Basically once every 5-7 days the internet becomes incredibly slow and attempting to access the web interface of the modem won't be possible (it will never finish loading the login page). At this point, the only solution is to reboot the modem manually (power cycle), and immediately after it becomes very fast again.

I have no internal router (I'm using the modem's router with both 5GHz and 2.4GHz WiFi on), and I am not running anything during this time that is taking bandwidth (no torrents or anything). Regular usage is typical web usage, YouTube streaming, and PS4 gaming. My PS4 does have some other connection problems at times, but I will post seperately about this.

---

@automaton

if accessing the modems log in page is slow, then I would say the issue is either your PC or the modem. I would swap the modem and see if that helps. 

[automaton]

Thanks for the reply. It's slow from any device which attempts to access it once it gets into this state.

While I can replace the modem, I'm a bit hesitant to be honest. Prior to this modem (back in 2016) I had a lot of issues with my modem (and my old location). Most of those issues were largely fixed when I moved to this modem, and got a specific firmware update.

I'm afraid if I swap modems I'll start having all my old problems again..

[automaton]

Also would a factory reset maybe help? And if so, does a factory reset reset the firmware back to the original, or does it keep latest and just wipe settings.

[gp-se]

---

@automaton wrote:
Also would a factory reset maybe help? And if so, does a factory reset reset the firmware back to the original, or does it keep latest and just wipe settings.

---

@automaton

You could try a factory reset, it will keep the current firmware. 

To do a factory reset use a pen tip or similar item to press and hold the reset button on the back of the modem down for 15 seconds, then release. The modem will reboot and you'll have to set everything up again.

[Jennnnnnn9475]

Mine right now with Rogers telling me it’s good leaves is -9.50.

Not sure why it cuts in and out and drops for hours tv pixelated oh well 2.5 weeks of headache TV and internet. They will be back for second service call 5 days after the first hopfully Sunday it’s a real Rogers Tec that knows what he or she is doing. So glad internet for half 15 days a month is $100 and my cell data is $200 now as I need internet

[Datalink]

@Jennnnnnn9475  -9.5 dBmV for the DOCSIS 3.0 signal levels isn't good, but, its within the + / - 10 dBmV signal level envelope that Rogers uses as its determination point of dispatching a field tech, or not.  Typically from what I've seen, customers experience issues long before the signal level drops down to the - 9.5 dBmV range.  The normal level is 0 dBmV for the DOCSIS 3.0 signal levels.  The operating range for the downstream DOCSIS 3.0 level received by the modem is + / - 15 dBmV.  

All of this is a moot point as the white CODA-4582 modem uses DOCSIS 3.1 on the downstream side.  The signal data that is shown for the OFDM channel which is located in the modem's STATUS .... DOCSIS WAN tab, is incorrect.  So, you would have to ask tech support if the OFDM channel is running within its specified signal level and signal to noise ratio tolerances.  Tech Support apparently has access to the correct levels as determined by the modem.  

Can you log into the modem, navigate to the STATUS .... DOCSIS WAN tab, copy the downstream table all the way down to the bottom of the upstream table, all in one go.  Paste that into a post.  The copy and paste process will paste in the text contents of the table.  I'd like to see the whole table, including the OFDM sections if you happen to have a white CODA-4582 modem, so, if you copy the table all in one go, that will be included.  Ignore the data that sits above the Downstream Overview title, as that is specific to the modem and should not be posted in an open forum. 

If you happen to have pixelation issues with the tv, thats a definite sign of poor cable signal levels.  That should be your first complaint, following in close second, poor internet service.  You should not be experiencing service drop outs at all.  The service should be rock solid and you shouldn't even have to think about it.  It should work, and keep on working.....

When you call tech support, ensure that the CSR understands that you're experiencing service drop outs, where there is a complete cable failure.  It might show as if its working when you're chatting with the CSR, but, ensure that you get the point across that the cable service is not dependable and fails for hours on end.  

Also call Billing and ask the Billing CSR for a rebate due to the failed service and reduced rate going forward until this is resolved.  

[Jennnnnnn9475]

DOCSIS Overview
Network Access Process...
IP Address 0.0.0.0
Subnet Mask
Gateway IP
DHCP Lease Time 😧 06 H: 18 M: 09 S: 07
Downstream Overview
Port ID Frequency (MHz) Modulation Signal strength (dBmV) Signal noise ratio (dB) Channel ID
1 603000000 256QAM 1.700 40.946 9
Upstream Overview
Port ID Frequency (MHz) BandWidth Modulation Type Signal Strength (dBmV) Channel ID
1 30596000 6400000 ATDMA 34.500 1

[Jennnnnnn9475]

Ya I have done this several times

From old posts this happened last year around the same time

[Datalink]

@Jennnnnnn9475, can you have a look at the back of the modem and let me know what model it is?  It will show something like CGN3ACSMR or close model for the black modem, and CODA-4582 for the white modem.  

You only have one downstream and one upstream channel running, assuming thats the entire table.  If so, you have severe cable and / or connector problems.  Essentially you cable service is non-existent.  You need a tech now.  Am I correct that you won't see a tech until Sunday?  

You should definitely call Billing to ask for a rebate and reduced rates going forward.  

Does the external cable arrive at your home via underground route from a local green cable pedestal, or overhead from a utility pole?  Just curious at this point. 

EDIT;  Assuming that you posted the entire table, if you require your internet services, you should call back into tech support to look for a field tech appointment at your earliest convenience. 

[Jennnnnnn9475]

It’s cgn3

Rogers said nothing they can do until then and would not help

I took the day off work and Tec came changed a spliter said it was ok now and left

Now the cell is through the roof

[Datalink]

Sounds like a complete pain.  Can you confirm for me that all you have in those tables is one downstream and one upstream channel?  If so, the modem is running in survival mode basically, barely able to communicate with the upstream Cable Modem Termination System.  

Given what you indicated about your cell costs, its worth a call to Billing, and, I'd be looking for a rebate on the cell bill as well, assuming that your cell phone is with Rogers. 

[Jennnnnnn9475]

Not there data is the most expensive and not worth it

[Alex4161]

Hello @Datalink and others

 My main wire coming from the Tap to the side of my house was replaced last week.  I just wanted to know if these signal levels to my CODA modem are good.

Thanks 

Downstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Signal noise ratio (dB)
1	633000000	256QAM	0.700	13	37.356
2	849000000	256QAM	1.600	2	37.636
3	855000000	256QAM	1.300	3	37.636
4	861000000	256QAM	1.000	4	37.356
5	579000000	256QAM	2.600	5	37.636
6	585000000	256QAM	3.600	6	37.636
7	591000000	256QAM	4.300	7	38.605
8	597000000	256QAM	4.500	8	38.983
9	603000000	256QAM	3.900	9	38.605
10	609000000	256QAM	3.300	10	37.636
11	615000000	256QAM	2.500	11	37.636
12	621000000	256QAM	1.400	12	37.356
13	303000000	256QAM	2.500	1	36.387
14	639000000	256QAM	0.600	14	37.356
15	645000000	256QAM	0.700	15	37.636
16	651000000	256QAM	1.500	16	37.356
17	657000000	256QAM	2.500	17	37.636
18	663000000	256QAM	3.800	18	37.636
19	669000000	256QAM	5.000	19	38.605
20	675000000	256QAM	6.000	20	38.605
21	681000000	256QAM	5.800	21	38.605
22	687000000	256QAM	4.900	22	37.636
23	693000000	256QAM	3.500	23	37.356
24	699000000	256QAM	2.400	24	37.356
25	705000000	256QAM	1.500	25	37.636
26	711000000	256QAM	0.700	26	37.356
27	717000000	256QAM	0.800	27	37.356
28	723000000	256QAM	0.400	28	36.610
29	825000000	256QAM	0.300	29	37.356
30	831000000	256QAM	0.800	30	37.636
31	837000000	256QAM	1.500	31	37.356
32	843000000	256QAM	1.400	32	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	4K	275600000	YES	YES	YES	3.000000

Upstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Bandwidth
1	38596000	ATDMA - 64QAM	34.250	3	3200000
2	30596000	ATDMA - 64QAM	30.750	1	6400000
3	23700000	ATDMA - 64QAM	30.250	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

[Datalink]

@Alex4161 they don't look too bad.  The upper DOCSIS 3.0 signal levels have a larger high to low value spread than I would like to see, but, I wouldn't expect any issues with where they currently are.   The signal no noise ratios are fine.  The upstream levels aren't too bad either.   All of those values are well within spec. 

If you run an ethernet speedtest at www.speedtest.net Toronto, Ottawa or Montreal Rogers servers, what do you get for results?  Use the closest one to your home. 

[Alex4161]

@Datalink

I am getting 603/23 on my 500/20 plan so no complaints 🙂

[bfwaye]

My modem CGNM-3552 always shows two green connection lights flashing on & off - not solid. The modem's DOCSIS WAN tab always shows a minus quantity for the downstream signal strength (dBmV). Would this be normal for this modem? I am connected via Ethernet cable.

[RogersCilio]

Hey @bfwaye,

Welcome to our Rogers Community Forum and good question!

I can certainly understand your concern, especially since typically, connection lights flashing indicate the modem is intermittently dropping connection. However, that doesn't necessarily mean it's the case here. I've provided a chart below for you own reference. Let us know what you're seeing your end?

As for your signal, minus quantity doesn't always reflect an issue. There's a range your downstream signal should be in between, for it to be working at it's optimum. @RogersMoin touches on this on page 1 of this thread. Have a look and let us know how your signal is in comparison?

We look forward to hearing back from you! 

Cheers, 

RogersCilio

[bfwaye]

Thanks for the informative chart.

Here are the Upstream Overview

Upstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	BandWidth
1	30596000	ATDMA - 64QAM	46.500	4	6400000
2	38596000	ATDMA - 64QAM	48.000	6	3200000
3	23700000	ATDMA - 64QAM	46.750	5	6400000

Here are the downstream overview.

Downstream Overview

Port ID	Frequency (MHz)	Modulation	Signal strength (dBmV)	Channel ID	Signal noise ratio (dB)
1	657000000	256QAM	-1.100	17	35.780
2	561000000	256QAM	-1.400	2	36.610
3	567000000	256QAM	-1.500	3	36.387
4	573000000	256QAM	-1.400	4	36.610
5	579000000	256QAM	-1.300	5	36.610
6	585000000	256QAM	-1.200	6	36.387
7	591000000	256QAM	-1.300	7	36.387
8	597000000	256QAM	-1.500	8	35.780
9	603000000	256QAM	-1.500	9	35.780
10	609000000	256QAM	-1.700	10	35.595
11	615000000	256QAM	-1.800	11	35.595
12	621000000	256QAM	-2.000	12	35.595
13	633000000	256QAM	-2.500	13	35.595
14	639000000	256QAM	-2.100	14	35.084
15	645000000	256QAM	-1.400	15	35.084
16	651000000	256QAM	-1.400	16	34.926
17	555000000	256QAM	-1.300	1	36.610
18	663000000	256QAM	-0.900	18	35.595
19	669000000	256QAM	-0.900	19	35.595
20	675000000	256QAM	-0.700	20	35.084
21	681000000	256QAM	-0.300	21	34.926
22	687000000	256QAM	-0.400	22	34.926
23	693000000	256QAM	-0.300	23	34.346
24	699000000	256QAM	-0.300	24	34.346
25	705000000	256QAM	-0.300	25	34.300
26	711000000	256QAM	-0.700	26	33.800
27	717000000	256QAM	-0.900	27	33.600
28	723000000	256QAM	-1.200	28	33.000
29	729000000	256QAM	-1.500	29	33.000
30	735000000	256QAM	-1.600	30	32.900
31	741000000	256QAM	-1.900	31	32.700
32	747000000	256QAM	-2.100	32	32.600

[toolcubed]

Hi everyone. CODA-4582U user here with 36T5 firmware running in bridge mode. There has been work going on about one block away from my house in what appears to be a node split...where there was a single large green “vault” (Rogers’ term) box, now there’s two side by side. Earlier today, cable (all services) went down for about 10 mins. For now, I’m going to assume that it was due to the node work being done. When it came back, I didn’t notice anything different with internet performance but decided to login to the CODA and check signal levels. The signal strength values themselves across all 32 DOCSIS 3.0 channels didn’t change (remained between +3 to +4). The OFDM signal also remained unchanged at +4. The biggest difference I noticed is that prior to the cable going down, my signal-to-noise values for the 32 DOCSIS channels were between 37 and 38. Now they’re between 33 and 34. There was also a slight change in the 3 upload channel signal values. Prior to today’s outage, upload signal values were 33, 34, and 37. Now they’re 34, 35, and 38. Is there any reason for me to be concerned? As stated, I haven’t noticed any performance difference. I’m on the 500u plan and consistently get 490-530 down and 17-21 up...before and after today’s outage (before and after signal values changed).