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TechnoScott
Premium
join:2003-03-25
00000
reply to EG

Re: [Signals] Signal check

Yes, in fact the maximum transmit requirements drop for D3 bonded when they bond over 3 channels.



EG
The wings of love
Premium
join:2006-11-18
Union, NJ
kudos:9

said by TechnoScott:

Yes, in fact the maximum transmit requirements drop for D3 bonded when they bond over 3 channels.

That's because of "total power" but then why is it that many systems like to and do have DOCSIS 3 run higher like above 40 dB but below 50 dB than did DOCSIS 2 ?

kerfuffle

join:2012-06-07

The upstream power level does seem to fluctuate a few dBs throughout the course of the day. Latest reading:

Downstream Value
Frequency 705000000 Hz
Signal to Noise Ratio 36 dB
QAM QAM256
Network Access Control Object ON
Power Level -4 dBmV
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
Upstream Value
Channel ID 1
Frequency 30100000 Hz
Ranging Service ID 649
Symbol Rate 5.120 Msym/s
Power Level 33 dBmV

The signal fluctuation coincided with these log entries which refer to channel changes. Is this a sign of ongoing issues?

2012-06-22 16:56:43 7-Information Channel Change Complete - Enabling Bridge
2012-06-22 16:56:43 7-Information C203.0 DCC arrive new
2012-06-22 16:56:38 7-Information Starting Ranging On Channel 1
2012-06-22 16:56:38 7-Information Dynamic Channel Change of Downstream Requested - Disabling Bridge
2012-06-22 16:56:38 7-Information Dynamic Channel Change of Downstream Requested - Setting tuner to 705.0MHz
2012-06-22 16:56:38 7-Information C202.0 DCC depart old
2012-06-22 14:16:39 7-Information Channel Change Complete - Enabling Bridge
2012-06-22 14:16:39 7-Information C203.0 DCC arrive new
2012-06-22 14:16:34 7-Information Starting Ranging On Channel 1
2012-06-22 14:16:34 7-Information Dynamic Channel Change of Downstream Requested - Disabling Bridge
2012-06-22 14:16:34 7-Information Dynamic Channel Change of Downstream Requested - Setting tuner to 711.0MHz
2012-06-22 14:16:34 7-Information C202.0 DCC depart old
2012-06-20 07:46:57 7-Information SNMP: Working in SNMP V1/2c Only NmAccess mode
2012-06-20 07:46:55 7-Information INITIALIZATION COMPLETE - MODEM IS OPERATIONAL
2012-06-20 07:46:55 7-Information B401.0 Authorized
2012-06-20 07:46:55 7-Information SEC: Co-Signer CVC from configuration file was verified
2012-06-20 07:46:54 7-Information REGISTRATION COMPLETE - Waiting for Operational status
2012-06-20 07:46:54 7-Information REG: Capability type isn't supported by CMTS
2012-06-20 07:46:54 7-Information Registration file - downloaded
2012-06-20 07:46:52 7-Information Trying to download Configuration file ...


TechnoScott
Premium
join:2003-03-25
00000

1 edit
reply to EG

Because some systems are lazy and think padding return amplifiers will get them better carrier to noise figures because the modems are transmitting higher?


kerfuffle

join:2012-06-07

My logs are capturing a lot of entries pertaining to dynamic downstream changes. Is this normal behavior? I don't recall the frequency changing as often as it is right now, or at all.

2012-06-24 14:39:48 7-Information Channel Change Complete - Enabling Bridge
2012-06-24 14:39:48 7-Information C203.0 DCC arrive new
2012-06-24 14:39:43 7-Information Starting Ranging On Channel 1
2012-06-24 14:39:43 7-Information Dynamic Channel Change of Downstream Requested - Disabling Bridge
2012-06-24 14:39:43 7-Information Dynamic Channel Change of Downstream Requested - Setting tuner to 705.0MHz
2012-06-24 14:39:43 7-Information C202.0 DCC depart old
2012-06-23 17:38:25 7-Information Channel Change Complete - Enabling Bridge
2012-06-23 17:38:25 7-Information C203.0 DCC arrive new
2012-06-23 17:38:20 7-Information Starting Ranging On Channel 1
2012-06-23 17:38:20 7-Information Dynamic Channel Change of Downstream Requested - Disabling Bridge
2012-06-23 17:38:20 7-Information Dynamic Channel Change of Downstream Requested - Setting tuner to 711.0MHz
2012-06-23 17:38:20 7-Information C202.0 DCC depart old
2012-06-23 15:30:38 7-Information SNMP: Working in SNMP V1/2c Only NmAccess mode
2012-06-23 15:30:36 7-Information INITIALIZATION COMPLETE - MODEM IS OPERATIONAL
2012-06-23 15:30:36 7-Information B401.0 Authorized
2012-06-23 15:30:36 7-Information SEC: Co-Signer CVC from configuration file was verified
2012-06-23 15:30:35 7-Information REGISTRATION COMPLETE - Waiting for Operational status
2012-06-23 15:30:35 7-Information REG: Capability type isn't supported by CMTS
2012-06-23 15:30:35 7-Information Registration file - downloaded
2012-06-23 15:30:33 7-Information Trying to download Configuration file ...
Event Log has reached maximum size. Older log entries are lost.



EG
The wings of love
Premium
join:2006-11-18
Union, NJ
kudos:9

That small sampling of log entries shows only one or two of these events per day. By no means is that a lot. Intermittent / occasional noise on the lines can cause these.