signal levels

[PAYNEARDO]

Just wanted to ask if my signal levels seem OK before getting a techie out to look at my cable modem as it keeps disconnecting

Thanks for looking :)

Payneardo


Cable Modem Downstream
Downstream Lock : Locked
Downstream Channel Id : 7
Downstream Frequency : 331000000 Hz
Downstream Modulation : QAM256
Downstream Symbol Rate : 5360.537 Ksym/sec
Downstream Interleave Depth : taps32Increment4
Downstream Receive Power Level : -12.0 dBmV
Downstream SNR


Cable Modem Upstream
Upstream Lock : Locked
Upstream Channel ID : 1
Upstream Frequency : 25800000 Hz
Upstream Modulation : QPSK
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 56.5 dBmV
Upstream Mini-Slot Size : 2

[whydoIneedatech]

Ex- Telewest or Ex-Ntl

ownstream receive looks high, its right on the upper limit, but where is the Downstream SNR

Upstream transmit power maybe high as well.

What Modem make and model? I need this to be sure.

[PAYNEARDO]

opps notice it missed it out :0

Its the blue ntl 250 modem on ex ntl :)

here it is agian with the downstream SNR :)

Cable Modem Downstream
Downstream Lock : Locked
Downstream Channel Id : 7
Downstream Frequency : 331000000 Hz
Downstream Modulation : QAM256
Downstream Symbol Rate : 5360.537 Ksym/sec
Downstream Interleave Depth : taps32Increment4
Downstream Receive Power Level : -12.0 dBmV
Downstream SNR : 37.1 dB

[homealone]

SNR looks ok, but the upstream & downstream power levels look marginal..

here are mine for comparison


Downstream Receive Power Level : 7.8 dBmV
Downstream SNR : 39.1 dB

Upstream transmit Power Level : 48.5 dBmV

[Nedkelly]

The upstream is to high as is the receive is to low -10 is the limit for this modem .You need a tech to check the levels :)

[whydoIneedatech]

opps notice it missed it out :0

Its the blue ntl 250 modem on ex ntl :)

here it is agian with the downstream SNR :)

Cable Modem Downstream
Downstream Lock : Locked
Downstream Channel Id : 7
Downstream Frequency : 331000000 Hz
Downstream Modulation : QAM256
Downstream Symbol Rate : 5360.537 Ksym/sec
Downstream Interleave Depth : taps32Increment4
Downstream Receive Power Level : -12.0 dBmV
Downstream SNR : 37.1 dB

Definitely requires a Tech to adjust your power levels, ring Tech support.

[PAYNEARDO]

Ok thanks everybody, will sort a tech out for when I am next in :)

How many days in advance is the booking for normally ??

and what time scales ? (I will book one via newsgroups)

Cheers

Payne

[whydoIneedatech]

Ok thanks everybody, will sort a tech out for when I am next in :)

How many days in advance is the booking for normally ??

and what time scales ? (I will book one via newsgroups)

Cheers

Payne

If you phone up in the morning you could get a Tech that day or even the next day, it just depends on availability.

[xspeedyx]

If you phone up in the morning you could get a Tech that day or even the next day, it just depends on availability.

Best to give as many days in advance as you can, more likely to get the day you want if you do that