Manual traceroute record from USA to Manchester, UK.
(Thanks to Ali at Hotmail)

Tracing route to satsig.net [80.71.15.155] over a maximum of 30 hops:
1 10 ms <10 ms 10 ms 10.34.224.1
2 <10 ms 10 ms 10 ms pos2-3-nycmnyc-rtr2.nyc.rr.com [24.29.97.89]
3 <10 ms 10 ms 10 ms pos4-0-nycmnya-rtr2.nyc.rr.com [24.29.101.249]
4 <10 ms <10 ms 10 ms pop2-nye-P13-3.atdn.net [66.185.141.37]
5 <10 ms 10 ms 10 ms bb1-nye-P1-0.atdn.net [66.185.151.64]
6 10 ms 10 ms 10 ms bb2-ash-P10-0.atdn.net [66.185.152.87]
7 10 ms 10 ms 10 ms pop3-ash-P1-0.atdn.net [66.185.148.211]
8 10 ms 20 ms 20 ms if-10-0.core1.Ashburn.teleglobe.net [63.243.149.97]
9 80 ms 80 ms 90 ms if-3-0.core3.NewYork.teleglobe.net [63.243.149.102]
10 90 ms 80 ms 80 ms if-6-0.core2.NewYork.Teleglobe.net [64.86.83.157]
11 80 ms 80 ms 80 ms if-2-0.core1.London.Teleglobe.net [207.45.220.38]
12 80 ms 80 ms 91 ms if-0-0-0.bb2.London.Teleglobe.net [195.219.96.81]
13 80 ms 90 ms 80 ms 195.219.2.18
14 90 ms 90 ms 100 ms 80.71.15.155

Second traceroute from the USA, by Selby (added 27 Nov 2004)

thanx 4 yer site.  good info.  regarding using larger dish 4 DirecWay, isn't a dish a dish, as long as focus is found?  can't a c-band dish b used?
 
Tracing route to satsig.net [80.71.15.155] over a maximum of 30 hops:
1 10 ms <10 ms 10 ms 10.34.224.1
2 <10 ms 10 ms 10 ms pos2-3-nycmnyc-rtr2.nyc.rr.com [24.29.97.89]
3 <10 ms 10 ms 10 ms pos4-0-nycmnya-rtr2.nyc.rr.com [24.29.101.249]
4 <10 ms <10 ms 10 ms pop2-nye-P13-3.atdn.net [66.185.141.37]
5 <10 ms 10 ms 10 ms bb1-nye-P1-0.atdn.net [66.185.151.64]
6 10 ms 10 ms 10 ms bb2-ash-P10-0.atdn.net [66.185.152.87]
7 10 ms 10 ms 10 ms pop3-ash-P1-0.atdn.net [66.185.148.211]
8 10 ms 20 ms 20 ms if-10-0.core1.Ashburn.teleglobe.net [63.243.149.97]
9 80 ms 80 ms 90 ms if-3-0.core3.NewYork.teleglobe.net [63.243.149.102]
10 90 ms 80 ms 80 ms if-6-0.core2.NewYork.Teleglobe.net [64.86.83.157]
11 80 ms 80 ms 80 ms if-2-0.core1.London.Teleglobe.net [207.45.220.38]
12 80 ms 80 ms 91 ms if-0-0-0.bb2.London.Teleglobe.net [195.219.96.81]
13 80 ms 90 ms 80 ms 195.219.2.18
14 90 ms 90 ms 100 ms 80.71.15.155
 

s
elby
Selby
 
Many thanks for this traceroute.  I will add it to my collection.
 
Regarding Direcway dish size.  A larger dish will improve the receive performance and noticably reduce the outage time during rain events.  ( Don't try a 5m dish or larger, that might overload your LNB and make matter worse!.  You need special low gain LNBs for large dishes. )
 
Regarding transmit power my understanding now is that BUC transmit power is automatically made constant in the BUC and is not affected by the cable length, by any power setting in the indoor box or by any remote signalling of the required power setting to the BUC.
 
( All these apply in other types satellite internet terminals.  It is quite common to adjust levels in the indoor box or to adjust the output power setting in the ORU, to compensate for cable length and dish size so as to make the power transmitted in the air to the satellite exactly correct. )
 
Assuming a fixed output power from the BUC means that if you use a larger dish the power to the satellite in the air will increase.  This will improve the transmit margin and this benefit the site during rain.  It will however, during clear sky conditions, send an abnormally high level to the satellite.   A doubling of the power (by using twice the dish area) is not likely to be a big deal unless you are in the centre of the coverage area.  Larger increases could cause interference to users on the opposite polarisation or could degrade the operation of your signals into the burst receivers at the hub.  It is not easy making the hub receivers cope with incoming signal bursts of widely varying level.  I don't have the Direcway terms and conditions but I don't think they should allow operation of unapproved antennas.  However, they probably require/allow larger dishes (of approved design) in the outer contours of the satellite beam coverage.
 
Regarding use of C band antennas.  Sidelobe pattern performance is important and this depends on dish geometry (axisymmetric or offset), the feed size coupled with the dish F/D ratio, and the surface tolerance of the reflector surface.  Feed polarisation purity also matters.  Reflectors built to C band quality will not necessarily be acceptable at Ku band.  Ku band dishes will however work fine at C band with proper feed arrangements.
 
Best regards, Eric.

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