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
selby
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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