Expert

Re: Bonded downstream channels

with a decent antenna, antennaweb says 56 channels from 16 transmitters,

http://www.antennaweb.org/Stations?Address=27403&AntennaHeight=True&Latitude=36.0733691&Longitude=-7...

 

Sharer

Re: Bonded downstream channels

This is the TVFool results for my exact address:
http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%3de6a443b0d21a25

 

I'll try this over the weekend if i get time.

Expert

Re: Bonded downstream channels

The upper in green are line of sight and you can probably see their tower lights from rooftops if there aren't trees in the way. A 6" piece of wire may pick them up.  Neither data base was updated since January and it's possible some channels moved out of the 600 mHz area for Sprint to use for 5G service. Those will be ch 37 on up.

You need to print out a tv and cable ch frequency chart, ch's 2-13 are the same but 14 on up are very different between broadcast and cable. Also use the actual RF channel frequency not the virtual or aliased one that broadcasters were allowed to keep so that "TV2" didn't need to change their logo to "TV33.1" etc. My understanding is any new or hanged licensees must now use the same Virtual as their actual rf channel they transmit on.

a 5 or 6" piece of wire is a 1/4 wave and works well for the 500 mHz channels that are strong, I'd start with a really short, out of resonance wire to see what's really strong where you are, this ingress might be a harmonic of an FM radio station, business band or public safety radio.

Or some sort of mix .

 

Sharer

Re: Bonded downstream channels

This is the signal page from my neighbor a couple of poles further downstream on my block.  She's using a leased modem/router wireless gateway from Spectrum, has almost 86 days uptime.  Her modem has also skipped 519 and 525 MHz.

 

Touchstone Status

Downstream
 DCIDFreqPowerSNRModulationOctetsCorrectedsUncorrectables
Downstream 115543.00 MHz1.20 dBmV33.83 dB256QAM2221455202350
Downstream 210513.00 MHz1.00 dBmV33.83 dB256QAM1286995376210
Downstream 313531.00 MHz1.20 dBmV33.83 dB256QAM127735457700
Downstream 49507.00 MHz0.60 dBmV32.96 dB256QAM1284884151190
Downstream 517555.00 MHz1.20 dBmV33.96 dB256QAM128367405000
Downstream 619567.00 MHz0.60 dBmV33.83 dB256QAM130548660600
Downstream 720573.00 MHz0.90 dBmV33.96 dB256QAM129278592100
Downstream 821579.00 MHz0.90 dBmV33.83 dB256QAM128482779600
Downstream 922585.00 MHz1.00 dBmV33.96 dB256QAM127909254300
Downstream 1023591.00 MHz1.20 dBmV34.35 dB256QAM126799261200
Downstream 1124597.00 MHz1.20 dBmV34.48 dB256QAM1262866028150
Downstream 1225603.00 MHz1.70 dBmV34.35 dB256QAM1263056854170
Downstream 1326609.00 MHz1.90 dBmV34.35 dB256QAM1267933535180
Downstream 1429627.00 MHz1.80 dBmV33.96 dB256QAM130577934400
Downstream 1531639.00 MHz1.30 dBmV33.49 dB256QAM130877895660
Downstream 1632645.00 MHz1.40 dBmV33.38 dB256QAM127233961800
Reset FEC Counters
Upstream
 UCIDFreqPowerChannel TypeSymbol RateModulation
Upstream 1437.00 MHz38.21 dBmVDOCSIS2.0 (ATDMA)2560 kSym/s16QAM
Upstream 2119.40 MHz35.00 dBmVDOCSIS1.x (TDMA)2560 kSym/s16QAM
Upstream 3330.60 MHz36.50 dBmVDOCSIS2.0 (ATDMA)5120 kSym/s64QAM
Upstream 4224.20 MHz36.50 dBmVDOCSIS2.0 (ATDMA)5120 kSym/s64QAM

 Status
System Uptime:85 d: 23 h: 14 m
Computers Detected:staticCPE(1), dynamicCPE(0)
CM Status:OPERATIONAL
Time and Date:Sun 2017-08-13 08:27:10

 

Highlighted
Expert

Re: Bonded downstream channels

the node has serious issues, her s/n is on the low side and also has a lot of skipped channels as well, problem is that these aren't very strong local broadcast channels so it doesn't appear to be from broadcast TV. Must be some sort of head end or amplifier overload/mixing issue.

here's the list of her slip[ped channls by what local tv broadcast channels they'd be on.

 

519 mHz  22

525 mHz 23

537 mHz 25

549 mHz 27

615 mHz 38

621 mHz 39

633 mHz 41

Sharer

Re: Bonded downstream channels

I did an on-air scan with no wire connected to the antenna/coax on the TV.  It found no channels..... but I noticed as the scan went through the channel numbers, it displayed each number for about 4 or 5 seconds and then moved up to the next number EXCEPT for channels 29, 33, and 35.  For those three channels during the channel scan, it sat on them for about four times as long, almost as if it was trying the pick up a weak signal.  All three of those channels are listed in the closest green range at TVFool.

http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%3de6a443b0d21a25

I have not done a scan with a wire connected yet.

 

MsRaye wrote on Saturday:

Your tv is connected to the cable box by HDMI cable, not coax, correct?

Nothing is on the antenna connector, set the setup for an antenna connection to see if there are really strong channels that get in with nothing connected. Then try a 2" piece of wire like a bent open paperclip.Then try a 5" wire. You'll probably need to compare them with what's listed on tvfool to find the actual channels rather than the aliases that some are still using... Need to see if yo u pick up a 22 or 23 which are on 519 and 525 mHz

Expert

Re: Bonded downstream channels

Ok, for some pieces of wire, pull them out of a scrap piece of rg6 or rg 59 cable, only the last 3/8" needs to be bare copper to go into the connector, the white dielectric won't affect the signal.

 

Sharer

Re: Bonded downstream channels

I don't have any scrap pieces of cable.

Expert

Re: Bonded downstream channels

 use a bent open paperclip, lol.... bet you get a bunch of watchable channels, lol.

 This could be an issue with something transmitting on 1/3, 1/5, 1/7th the affected modem frequencies, like comercial broadcast or 2 way radio.

 

We get our tv channels on one fiber and the data on a second pair . , that way they don't have to send full bandwidth thru a single fiber pair and can split data nodes a lot easiersince the video goes to all homes. (at least with non SDV channels in the starter& standard tiers that DTA's pick off) bad/ misaligned hybrid fiber combiner splitter. This starts to get really complicated if some homes have internet only filters on their drops out at the pole tap off as those filters upset impedance at other ports on the same tapoff

It could also be a bad cable box or computer tuner card or a direct connected "cable ready" TV or VCR injecting crap back up the line( my Hauppage cards glitch the cable box when in channel scan or when changing channels, they do decode clear qam)

 

Looks like this may be bad multiple fiber combiners s that have seperate TV and data channels combined together and something is out of alignment. could be a head end issue as well.

 I'd expect those 3 channels your tv is trying to lock onto  to interfere with the modem, they're not... so it doesn't look like direct ingress.

 

Sharer

Re: Bonded downstream channels

Dropped DS channels behavior has returned, along with the newer T4 reboots every couple of nights.  This evening I see this.... you can see it trying to pick up a sixth channel (573 MHz) but the SNR is too low so it doesn't appear in the codeword section.

 

Downstream Bonding Channel Value
Channel ID12 13 15 18 20 
Frequency507000000 Hz 525000000 Hz 531000000 Hz 543000000 Hz 561000000 Hz 573000000 Hz 
Signal to Noise Ratio38 dB 39 dB 38 dB 38 dB 38 dB 26 dB 
Downstream ModulationQAM256 QAM256 QAM256 QAM256 QAM256 QAM256 
Power Level
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading
-2 dBmV  -2 dBmV  -1 dBmV  -1 dBmV  -1 dBmV  0 dBmV  

 

Upstream Bonding Channel Value
Channel ID
Frequency24200000 Hz 37000000 Hz 30600000 Hz 19400000 Hz 
Ranging Service ID5078 5078 5078 5078 
Symbol Rate5.120 Msym/sec 2.560 Msym/sec 5.120 Msym/sec 2.560 Msym/sec 
Power Level47 dBmV 48 dBmV 47 dBmV 45 dBmV 
Upstream Modulation[3] QPSK
[1] 16QAM
[2] 64QAM
 
[3] QPSK
[3] 16QAM
 
[3] QPSK
[1] 16QAM
[2] 64QAM
 
[3] QPSK
[2] 16QAM
 
Ranging StatusSuccess Success Success Success 

 

Signal Stats (Codewords)Bonding Channel Value
Channel ID12 13 15 18 
Total Unerrored Codewords11275896580 11259575440 11253769679 11253777606 11196472251 
Total Correctable Codewords24 62 30 124 
Total Uncorrectable Codewords480 1965 4499 2812 4135