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Old 12-13-2012, 03:16 PM   #1
PooperScooper
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TivoHD w/FIOS - weak signal on high freq channels

I seem to be having the opposite problem that used to happen with FIOS and TivoHDs.

I have a Alcatel-Lucent 1-211M-H ONT with a Motorola MCard in the TivoHD. After the install I noticed I couldn't get Showtime, TMCHD, SpikeHD and Comedy Central HD without pixelization. All of these channels at up in the 850Mhz range. I get signal strength of about 45-50 and SNR 29-30. "Good" channels get about 65-70 signal strength and 31-33 SNR.

The tech installed splitters, but bypassing them made no difference. I installed a low pass filter, no difference. I added a 10db signal amplifier on the one coax line going to the TivoHD, no difference. I took the TivoHD downstairs and connected it directly to the ONT with a 6ft piece of good RG6, no difference. I would have thought bypassing the splitters and installing the signal amplifier would show some change in strength and SNR, but it didn't. These reading are from DVR Diagnostics. Cable length from ONT to TivHD is about 70 ft.

I called Verizon support before trying the filter and amp and he was going to have me do something to the TivoHD but I passed because I wasn't home and he said I may lose my recordings. Anybody know the troubleshooting procedure they go through?

So, it seems I have a bad ONT (or it's not setup correctly) or a bad TivoHD. I'm at a loss as what to do next besides calling Verizon and see what their troubleshooting checklist is.

larry

MOCA signal to network router is fine. Something like over 200 is what you want and the value I see is 225. Same cable length as the run to the TivoHD.
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Last edited by PooperScooper : 12-13-2012 at 03:22 PM.
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Old 12-13-2012, 07:39 PM   #2
tivosupport_jacob
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Quote:
Originally Posted by PooperScooper View Post
I seem to be having the opposite problem that used to happen with FIOS and TivoHDs.

I have a Alcatel-Lucent 1-211M-H ONT with a Motorola MCard in the TivoHD. After the install I noticed I couldn't get Showtime, TMCHD, SpikeHD and Comedy Central HD without pixelization. All of these channels at up in the 850Mhz range. I get signal strength of about 45-50 and SNR 29-30. "Good" channels get about 65-70 signal strength and 31-33 SNR.

The tech installed splitters, but bypassing them made no difference. I installed a low pass filter, no difference. I added a 10db signal amplifier on the one coax line going to the TivoHD, no difference. I took the TivoHD downstairs and connected it directly to the ONT with a 6ft piece of good RG6, no difference. I would have thought bypassing the splitters and installing the signal amplifier would show some change in strength and SNR, but it didn't. These reading are from DVR Diagnostics. Cable length from ONT to TivHD is about 70 ft.

I called Verizon support before trying the filter and amp and he was going to have me do something to the TivoHD but I passed because I wasn't home and he said I may lose my recordings. Anybody know the troubleshooting procedure they go through?

So, it seems I have a bad ONT (or it's not setup correctly) or a bad TivoHD. I'm at a loss as what to do next besides calling Verizon and see what their troubleshooting checklist is.

larry

MOCA signal to network router is fine. Something like over 200 is what you want and the value I see is 225. Same cable length as the run to the TivoHD.
Larry,

It is possible that the main splitter at or after the ONT is attenuating the signal down too far. Would you please post back with the type of splitter that's being used, and it's frequency range? Also to clarify, when you installed the different devices (amp, etc.), were they in line after the wall directly before the TiVo?

Thanks!
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Last edited by tivosupport_jacob : 12-13-2012 at 07:56 PM.
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Old 12-14-2012, 06:13 AM   #3
PooperScooper
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Thanks for the reply, Jake. The ONT is in a separate closet from where the splitters were installed. At one point I connected the RG6 cable from the ONT directly to the TivoHD RG6 cable with a barrel connector bypassing the splitters. That didn't change anything. And, after taking the TivoHD (and small LCD TV) downstairs to the ONT closet, a 6ft RG6 cable connection directly from the ONT to the TivoHD didn't make a difference. Although I haven't tried the low pass filter or amplifier in the latter case. I may just do that to cover all bases.

Also, the first thing I did was replace the RG6 cable from the splitter to the TivoHD with a new 50ft cable.

Splitter info:

Cable from ONT goes to 2-way splitter (output 1 to network router, output 2 to 3-way splitter)

Verizon MOCA 2.0 2-way splitter, PDI-2WWB-2.0, 5-1675Mhz, 3Db attenuation each output

3-way splitter:

MCR Group, Inc 3-way splitter, 5-1200Mhz, 5.7 Db attenuation per output. Each output goes to a wall plate. However, for the TivoHD I bypassed the wall plate for testing.

larry
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Old 12-14-2012, 09:23 AM   #4
PooperScooper
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I took my TivoHD to the ONT closet and hooked things up again. There was a slight improvement from the last time I tried it, and I don't know why because I used the same equipment and cable. The only thing I did in between times was go through Guided Setup again.

ShowHD and TMCHD came in ok. They were right at the cusp of not working with ShowHD having a signal strength that varied between 56 and 60 with a SNR of 31. RS uncorrected was at 0 with RS corrected count nonzero. However, Comedy Central HD still had pixelization. Signal strength of 50 and SNR of 30. RS uncorrected nonzero. Low pass filter didn't help and when I connected the signal amplifier it got worse. ??? All outputs of amp weren't connected, would that be why? The extra cable I used was ok because I tested it inline with the other cable before hooking up to the amp.

So it seems to me a signal strength issue at the ONT or somehow the TivoHD is attenuating the signal before it hits the tuners.

The only other thing I haven't mentioned is that my TivoHD is 5 years old.

larry
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Old 12-14-2012, 01:29 PM   #5
PooperScooper
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Just got off the phone with Verizon tech support. I told him all the troubleshooting I did. He did some stuff to check the ONT and reset the cable card and found nothing that indicated a problem. So, it's either the cable card or the TivoHD according to him and I tend to agree. He put in a drop ship order for a new cable card for me and it should be here tomorrow. Hopefully that will do the trick.

larry
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Old 12-15-2012, 12:24 PM   #6
PooperScooper
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New cable card, no difference. I had some problems getting the new card setup correctly and the phone tech that helped me today was very knowledgeable. He said given that the signal attributes didn't change at all after removing splitters and going to a 10' run to the ONT it's a good bet it has something to do with the connecter on the TivoHD and the signal path to the tuner.

larry
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Old 12-20-2012, 09:17 AM   #7
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It seems my TivoHD (or its tuners) are the problem. I hooked up a new Premiere XL4 and Comedy Central HD and Spike HD come in now with no pixelization. Comedy Central HD is at 861Mhz, the very top of the frequency range. Signal Strength is now in the 70s and SNR is 31. RS uncorrected is 0 and RS corrected increments slowly. I can't do much more poking around until I activate the unit. I'm currently waiting on hold for Verizon tech to get my cable card activated. Self activation never seems to work for me after giving the all the info they need.

Since I can't find anybody else with a similar problem, it would be interesting to know if Verizon maps channels to the same frequencies for everybody or differently from location to location. The channels I had problems with were all above 850Mhz.

larry
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Old 06-29-2013, 10:03 PM   #8
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Has there been any change in status since your last post? What ended up happening?
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