Cable Forum - View Single Post

RB2004 · 28-08-2011, 15:04

Hi, ive been getting eratic speeds

and was told on the Virgin Media Community forum that my signal levels need sorting out, can anybody confirm?

Thanks

Connection

--------------------------------------------------------------------------------

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 299000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK
Security Enabled BPI+

--------------------------------------------------------------------------------

Downstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power SNR Docsis/EuroDocsis locked
Locked QAM256 194 55616000 Kbits/sec 299000000 Hz -6.4 dBmV 38.8 dB Hybrid
Locked QAM256 193 55616000 Kbits/sec 291000000 Hz -6.1 dBmV 38.3 dB Hybrid
Locked QAM256 195 55616000 Kbits/sec 307000000 Hz -6.1 dBmV 39.0 dB Hybrid
Locked QAM256 196 55616000 Kbits/sec 315000000 Hz -6.5 dBmV 38.5 dB Hybrid
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown

--------------------------------------------------------------------------------

Upstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power
Locked ATDMA 1 20480 Kbits/sec 35800000 Hz 49.2 dBmV
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV

--------------------------------------------------------------------------------

Primary Downstream Service Flow
Downstream(0)
SFID 2224
Max Traffic Rate 102400000 bps
Max Traffic Burst 10000 bytes
Mix Traffic Rate 0 bps

--------------------------------------------------------------------------------

Primary Upstream Service Flow
Upstream(0)
SFID 2223
Max Traffic Rate 10250000 bps
Max Traffic Burst 16320 bytes
Mix Traffic Rate 0 bps
Max Concatenated Burst 16320 bytes
Scheduling Type Best Effort

Also got these errors,

Event Log

--------------------------------------------------------------------------------

Time Priority Description
Sat Aug 27 23:18:09 2011 Critical (3) No UCDs Received - Timeout;;CM-MAC=a0:21:b7:22:3b:a8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;

Sat Aug 27 23:17:50 2011 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=a0:21:b7:22:3b:a8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;

Sat Aug 27 23:16:38 2011 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=a0:21:b7:22:3b:a8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;

Sat Aug 27 23:15:51 2011 Critical (3) No UCDs Received - Timeout;;CM-MAC=a0:21:b7:22:3b:a8;CMTS-MAC=00:0d:66:22:f8:01;CM-QOS=1.0;CM-VER=3.0;

Sat Aug 27 23:14:33 2011 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=a0:21:b7:22:3b:a8;CMTS-MAC=00:23:5e:6f:d1:74;CM-QOS=1.1;CM-VER=3.0;

Sat Aug 27 23:14:01 2011 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=a0:21:b7:22:3b:a8;CMTS-MAC=00:23:5e:6f:d1:74;CM-QOS=1.1;CM-VER=3.0;

Wed Aug 24 11:21:52 2011 Critical (3) SYNC Timing Synchronization failure - Failed to receive MAC SYNC frame within time-out period;CM-MAC=a0:21:b7:22:3b:a8;CMTS-MAC=00:23:5e:6f:d1:74;CM-QOS=1.1;CM-VER=3.0;

just want confirmation, as ive got an engineer coming tomorrow, as over the years ive had repeated signal problems that keep being corrected by engineers by moving my cable up on the line tap in the cabinet.. but i suspect an engineer is moving it down again at a later date to fix somebody elses fault.

So after I was told ive got signal problems again for what must be able the 4th time now, I wanted to try and get a thicker cable put in, as that was recomended when i first had the services installed 6 years ago, but the engineer who came down to fit the cable didnt have the cable with him and just moved my cable up the line tap in the cabinet instead fixing the problem.. but since then its been a reoccuring problem, that keeps coming back to haunt me.

Ive got 2 V+ boxes, and 1 V box, so outside in the brown box there is a 3 way splitter, then inside the house on 1 outlet there is a 2 way splitter to split broadband and TV to one of the V+ boxes.

want to also get Tivo, and 1 V+ box moved so then I will have 4 boxes.. which is also why id like to get these signal problems sorted now.

on one of my V+ boxes, my signal levels are,

SNR: 35.0 dB, 33,0dB, 34.0dB
AGC Signal Level: -6dBmV, -5dBmV, -9dBmV
Return Power: 46dBmV

have no idea if any of these levels are normal.

Thanks in advance.

28-08-2011, 15:04	#1
RB2004 Inactive Join Date: Jun 2009 Services: Services: 200 Mbit Gamer on Hub 3, 3x Arris V6 Boxes, CISCO V HD, VIP Package Posts: 689	Signal Levels Hi, ive been getting eratic speeds and was told on the Virgin Media Community forum that my signal levels need sorting out, can anybody confirm? Thanks Connection -------------------------------------------------------------------------------- Startup Procedure Procedure Status Comment Acquire Downstream Channel 299000000 Hz Locked Connectivity State OK Operational Boot State OK Operational Configuration File OK Security Enabled BPI+ -------------------------------------------------------------------------------- Downstream Channels Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power SNR Docsis/EuroDocsis locked Locked QAM256 194 55616000 Kbits/sec 299000000 Hz -6.4 dBmV 38.8 dB Hybrid Locked QAM256 193 55616000 Kbits/sec 291000000 Hz -6.1 dBmV 38.3 dB Hybrid Locked QAM256 195 55616000 Kbits/sec 307000000 Hz -6.1 dBmV 39.0 dB Hybrid Locked QAM256 196 55616000 Kbits/sec 315000000 Hz -6.5 dBmV 38.5 dB Hybrid Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown -------------------------------------------------------------------------------- Upstream Channels Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power Locked ATDMA 1 20480 Kbits/sec 35800000 Hz 49.2 dBmV Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV -------------------------------------------------------------------------------- Primary Downstream Service Flow Downstream(0) SFID 2224 Max Traffic Rate 102400000 bps Max Traffic Burst 10000 bytes Mix Traffic Rate 0 bps -------------------------------------------------------------------------------- Primary Upstream Service Flow Upstream(0) SFID 2223 Max Traffic Rate 10250000 bps Max Traffic Burst 16320 bytes Mix Traffic Rate 0 bps Max Concatenated Burst 16320 bytes Scheduling Type Best Effort Also got these errors, Event Log -------------------------------------------------------------------------------- Time Priority Description Sat Aug 27 23:18:09 2011 Critical (3) No UCDs Received - Timeout;;CM-MAC=a0:21:b7:22:3b:a8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; Sat Aug 27 23:17:50 2011 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=a0:21:b7:22:3b:a8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; Sat Aug 27 23:16:38 2011 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=a0:21:b7:22:3b:a8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; Sat Aug 27 23:15:51 2011 Critical (3) No UCDs Received - Timeout;;CM-MAC=a0:21:b7:22:3b:a8;CMTS-MAC=00:0d:66:22:f8:01;CM-QOS=1.0;CM-VER=3.0; Sat Aug 27 23:14:33 2011 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=a0:21:b7:22:3b:a8;CMTS-MAC=00:23:5e:6f:d1:74;CM-QOS=1.1;CM-VER=3.0; Sat Aug 27 23:14:01 2011 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=a0:21:b7:22:3b:a8;CMTS-MAC=00:23:5e:6f:d1:74;CM-QOS=1.1;CM-VER=3.0; Wed Aug 24 11:21:52 2011 Critical (3) SYNC Timing Synchronization failure - Failed to receive MAC SYNC frame within time-out period;CM-MAC=a0:21:b7:22:3b:a8;CMTS-MAC=00:23:5e:6f:d1:74;CM-QOS=1.1;CM-VER=3.0; just want confirmation, as ive got an engineer coming tomorrow, as over the years ive had repeated signal problems that keep being corrected by engineers by moving my cable up on the line tap in the cabinet.. but i suspect an engineer is moving it down again at a later date to fix somebody elses fault. So after I was told ive got signal problems again for what must be able the 4th time now, I wanted to try and get a thicker cable put in, as that was recomended when i first had the services installed 6 years ago, but the engineer who came down to fit the cable didnt have the cable with him and just moved my cable up the line tap in the cabinet instead fixing the problem.. but since then its been a reoccuring problem, that keeps coming back to haunt me. Ive got 2 V+ boxes, and 1 V box, so outside in the brown box there is a 3 way splitter, then inside the house on 1 outlet there is a 2 way splitter to split broadband and TV to one of the V+ boxes. want to also get Tivo, and 1 V+ box moved so then I will have 4 boxes.. which is also why id like to get these signal problems sorted now. on one of my V+ boxes, my signal levels are, SNR: 35.0 dB, 33,0dB, 34.0dB AGC Signal Level: -6dBmV, -5dBmV, -9dBmV Return Power: 46dBmV have no idea if any of these levels are normal. Thanks in advance.