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VMboy
09-06-2010, 22:26
Really poor upload speeds tonight, download isn't that much better. But then Upstream Modulation has been at QPSK most of the evening.

https://www.cableforum.co.uk/images/local/2010/06/28.png (http://www.speedtest.net)

Cable Modem Upstream
Upstream Lock : Locked
Upstream Channel ID : 1
Upstream Frequency : 18800000 Hz
Upstream Modulation : QPSK
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 54.5 dBmV
Upstream Mini-Slot Size : 2

Cable Modem Downstream
Downstream Lock : Locked
Downstream Channel Id : 4
Downstream Frequency : 331000000 Hz
Downstream Modulation : QAM256
Downstream Symbol Rate : 5360.537 Ksym/sec
Downstream Interleave Depth : taps32Increment4
Downstream Receive Power Level : 4.8 dBmV
Downstream SNR : 39.0 dB
deathtrap3000
09-06-2010, 22:29
Tried a diff server?
VMboy
09-06-2010, 23:22
Tried a diff server?

https://www.cableforum.co.uk/images/local/2010/06/26.png (http://www.speedtest.net)

---------- Post added at 23:22 ---------- Previous post was at 22:38 ----------

Now after a couple of reboots I am back with normal speeds.

https://www.cableforum.co.uk/images/local/2010/06/27.png (http://www.speedtest.net)
Sephiroth
10-06-2010, 08:05
For everybody's interest, at normal speeds, what are your upstream stats?
VMboy
10-06-2010, 10:12
For everybody's interest, at normal speeds, what are your upstream stats?

Cable Modem Upstream
Upstream Lock : Locked
Upstream Channel ID : 2
Upstream Frequency : 22200000 Hz
Upstream Modulation : QAM16
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 54.0 dBmV
Upstream Mini-Slot Size : 2

https://www.cableforum.co.uk/images/local/2010/06/25.png (http://www.speedtest.net)
Ignitionnet
10-06-2010, 10:26
Exactly the same issue as last time, please carry on :)
VMboy
10-06-2010, 10:49
If that is the case why is it still happening?
Ignitionnet
10-06-2010, 11:00
Faults can reoccur. Speak with Virgin and record the fault officially if concerned and they'll check it out and resolve it.
Chrysalis
13-06-2010, 01:05
my guess is the qpsk been only half the capacity of the qam16 channel is congested.

is the modem going back to the qpsk channel by itself without a reboot?
VMboy
13-06-2010, 13:39
is the modem going back to the qpsk channel by itself without a reboot?

No, it sometimes happens during a reset of modem or even just when I turn on the computer and then when I notice slow speeds I usually have a look at the modem settings and this is when I notice it's back to QPSK.

It's at QAM16 at present, interesting how long and when it changes to QPSK, hopefully not for a while.