Superhub : Superhub problem.

[Gre Funky]

So I came onto these forums a few days ago and posted a problem with my speeds. Information can be found at this topic:

http://www.cableforum.co.uk/board/12...b-problem.html

Anyways, a tech came out to adjust the power levels today, since he's been out, the speed hasn't got much better. I have a 50mb connection with a VM superhub. All these tests were taken within 30 seconds of each other.

Speedtest:
1.


2.


3.


Pingtest:
1.


2.


3.


Connection information:

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 315000000 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 32 55616000 Kbits/sec 315000000 Hz -8.1 dBmV 38.4 dB Hybrid
Locked QAM256 30 55616000 Kbits/sec 299000000 Hz -8.1 dBmV 38.3 dB Hybrid
Locked QAM256 31 55616000 Kbits/sec 307000000 Hz -7.9 dBmV 38.7 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
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 3 20480 Kbits/sec 45800000 Hz 47.2 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 976
Max Traffic Rate 53000000 bps
Max Traffic Burst 3044 bytes
Mix Traffic Rate 0 bps
Primary Upstream Service Flow
Upstream(0)
SFID 975
Max Traffic Rate 5140000 bps
Max Traffic Burst 8160 bytes
Mix Traffic Rate 0 bps
Max Concatenated Burst 8160 bytes
Scheduling Type Best Effort


Any help would be great, thanks.

[Chrysalis]

he didnt do a very good then as your power levels are too low.

whether thats the cause of your poor performance tho its doubtful but it still needs fixing.

[pip08456]

Pointless trying any other trouble shooting until power levels are within spec. (Logical progression and all that!).

[Gre Funky]

The Tech said that that's the best the power levels were going to get, he said everytime he tried to lower them, they just dropped. Whatever that means.

My speed test results are now getting only 1-2MBps. Is there is anything that could be done without involving the power?

---------- Post added at 16:08 ---------- Previous post was at 15:17 ----------

Yep, it seems to vary between 0.5-15MBps
Packed loss varys from 1-50%

[pip08456]

Power levels of -8.1 and -7.9 are way too low. You need to ring in again and get them sorted properly.

Optimal levels are:- Downstream -3dBmV - +7dBmV. Upstream Over 35dBmV and under 55dBmV.

[Chrysalis]

yeah and he told you he was trying to lower them? they need increasing.

[craigj2k12]

did he put any attenuators on the back of the superhub? if so you could try taking them off

[pip08456]

Originally Posted by craigj2k11

did he put any attenuators on the back of the superhub? if so you could try taking them off

As forward path attenuators are to reduce the downstream power levels it is doubtful, either that or an idiot tech!

[craigj2k12]

Originally Posted by pip08456

As forward path attenuators are to reduce the downstream power levels it is doubtful, either that or an idiot tech!

idiot tech has already been identified, trying to lower the power levels :S

[pip08456]

Originally Posted by craigj2k11

idiot tech has already been identified, trying to lower the power levels :S

Depends which one!

[Gre Funky]

The levels were high to start off with, as shown in the topic posted in my first post. However he lowered them too much, so it seems.

[Nopanic]

As above, nothing to do with the superhub, you have a tech to brain issue ..