Storms causing disconnects

i haven't had storm yet, but the band KA is very susceptible to storm and water. I think is normal your situation. If you read about the band KA, you will read about the problems in that situation. I am waiting the winter to review the situation by myself

Being the end user, you have to assume the person sent out by the isp's to do the install are competent. I know this is not always the case though.

I've had the Tooway system in install mode and the beeps indicate it is aligned satisfactory. On my avant I system I wasn't involved in the setup but did see the guy using a  spectrum analyser during the alignment phase. I don't have the passwords to access the modem to see what the stats are on that system.

good to know. the rain we had yesterday wa really heavy. not the normal stuff we see in the UK

Quote:

Mine has only ever gone off in thunder storms when the rain is so heavy it would make your head bleed if you were out in it...and I supposed it would be better not to have one's computer on during thunder storms anyway. 

The Tooway system is remarkably tolerant of bad weather conditions as it is after all, designed to work all over Europe, but certainly, in the case of thunderstorms and very heavy rain, synchronisation will be lost.

Hmmm. Service is back up.

Bit of a cynic but speeds have been poor for days. There's a storm in Italy... The service goes down, comes back up 30 minutes later and the speeds are up...

About half an hour, my snr was moving from 11 to 1 until then snr reaches the 0 and the system disconnect, later and comes back to 11 but the network register fails. About 30 mins disconnected.

No problems here in Valencia.

Here  if you put your mosue over the beam, you will se the Gateway associated and the location.

https://www.satsig.net/tooway/satellite-dish-pointing-ka-sat-tooway-europe.htm

Service has been unstable this evening.

Disconnected for 20 minutes. Back online now but RxSNR is only 8!!! Weather conditions my end are fine so I have to assume the other end has poor weather at the moment.

I must admit that I naively thought this service would be stable and only really severe weather conditions would take me offline....

During rain at your site the downlink bit rate specifically to your site alone, will reduce in steps from about 68 Mbit/s to about 28 Mbit/s as the modulation method and FEC coding applicable to the block of data intended for your site changes (from say 5/6 8-PSK to 1/2 QPSK), to assure minimum errors. Below CNR=3 dB, service will temporarily fail.

If you are limited to an upper bit rate of 20 Mbit/s (per second) by the hub router then this will apply regardless.  If you are the only site affected by rain in your spot beam then the total capacity of the beam will be little affected.  Some types of heavy rain are associated with quite small rain cell dimensions, like less than a mile.  Reduced bit rate due to congestion is only likely if the total capacity of the beam is reduced due to rainfall occurring all over the spot beam coverage, and all sites are receiving with adapted modulation and coding.

Similar modulation and coding changes are applied to the site uplinks, plus uplink power control if your Tx BUC has such a margin. It is really important that your dish pointing is centred as the transmit beam is narrower than the receive beam. When peaking up pointing it is not good enough to just get above some CNR value. You must align to the exact beam centre, which has an illdefined rounded top. It is not easy if you don't understand that the tx beam is narrower.

At the teleport gateway, the uplink has the possibility of uplink power control, e.g. automatically increasing transmit power during rain.  Also, large scale changes to modulation and coding can be applied in both directions. The idea is to dynamically achieve very high bit rates in clear sky, with lower rates during rain.  Such dynamic designs are better for internet access than the old-fashioned, fixed capacity, static coding and modulation, which gave highly reliable  steady low bit rates all of the time.

The objective is to mitigate the effects of rain at 20/30 GHz, which are far worse than at L, C or Ku band. Much larger bandwidths are possible at Ka band and also smaller spot beams with the same satellite antenna size, so it is a case of trying to get the best result for the customer with the science, technology and engineering skills available.