Archived from groups: alt.video.satellite.mpeg-dvb (
More info?)
Alan Stevens wrote:
> I forgot that those elevation markings on the mini-dish mount take the
> offset into consideration. I always use a separate angle finder because
> the mount's markings aren't accurate enough for me. Also having two
> different scales on some mounts for different size dishes is confusing.
> I never pay attention to them so I forgot those markings were there.
> You only need to compensate for the elevation offset if you use a
> separate measuring tool like I do.
>
> Sorry if I caused any confusion.
>
>
>
> "the_wise_elder" <jeremy_l_slotsky@hotmail.com> wrote in
> news:1124739954.598069.4750@f14g2000cwb.googlegroups.com:
>
> >
> > Alan Stevens wrote:
> >> G10 is definately above the horizon in London Ontario. G10 is one of
> >> the major cable satellites and it would be pretty useless if the cable
> >> companies on the US east coast couldn't see it. When using the elevation
> >> and azimuth figures you have calculated, I hope you realize that only
> >> with prime-focus dishes (feedhorn dead-center in the middle like a
> >> C-Band dish) do the elevation of the satellite and the elevation of the
> >> dish match each other. Dishes with offset feeds like a typical ku-Band
> >> system have the reflector pointing much lower that the calculated
> >> elevation of the desired satellite. This is because with offset feeds
> >> the satellite signal has to bounce off of the reflector and then
> >> riccochet downward into the feedhorn. Strangely enough, with all the
> >> experimenting I've done I've never bothered to note if it's an exact 90
> >> degree bend or not, perhaps one of the others in the group can expand on
> >> this point. If it is, you'd need to set the reflector angle at exactly
> >> half the elevation of G10 for reception at your location. The calculated
> >> azimuth bearing is the same regardless of whether the dish is
> >> prime-focus or offset.
> >>
> >> Coincidentally, I've have also experimented with G10 on a ku-only
> >> dish, my choice was an old Star Choice reflector. I could barely get the
> >> dish low enough in elevation due to the design of the mount. The mount
> >> was at its lowest elevation setting when I finally found it, with the
> >> elevation-adjustment bolts at the very end of their adjustment track. I
> >> ended up tilting the pole forward (off of plumb) in order to give me
> >> some room to fiddle. Since I'm farther west that you are, G10 is higher
> >> in elevation for me than it is for you, so you'd need to get even lower.
> >>
> >> Your calculations are fairly accurate, my software says that for
> >> London Ontario, G10 is at an elevation of 25.3 and azimith 232.55
> >> (rounding off the decimals) so with an offset feed, you're looking at an
> >> reflector elevation of about 13 degrees, ballpark estimate.
> >>
> >> The only usable transponders at my location with this particular dish
> >> were 12114-V and an analog wildfeed that happened to be broadcasting
> >> that morning. Those little dishes have a wide focus. I was getting Dish
> >> Network's info card on 12074-V from neighbouring Echostar9 with no
> >> problem when I was peaked on G10.
> >>
> >> I've found a big differences in the signal strength of the Ku-band
> >> sevices on G10, so you might have to be selective with the services
> >> you're targeting on that satellite. It's quite common for Ku satellites
> >> to "spot beam" their signals, and each transponder on the same satellite
> >> can have different coverage. At my location at the junction of
> >> Minnesota, Manitoba and Ontario, 12114-V (Fox and UPN in Arkansas) is
> >> red hot - I've got close to 100% signal strength, whereas 11720-V
> >> (Equity Mux) is unusable here. Equity's 11800-V is just fine. It could
> >> be a simple matter of the strength of each transponder, but I suspect
> >> it's an issue of the targeted coverage area of each transponder. I would
> >> expect other locations in Canada and the U.S. to have completely
> >> different signal strengths than mine. I use a 10 1/2 foot mesh with a
> >> dual-band feed horn.
> >>
> >> --
> >>
> >> From the keyboard of Alan - VE3NNM (Kenora, ON, CANADA)
> >> E-mail: ve3nnm AT lycos DOT com
> >>
http
/mywebpage.netscape.com/kenoraradio
> >>
> >>
> >>
> >>
> >> "the_wise_elder" <jeremy_l_slotsky@hotmail.com> wrote in
> >> news:1124722723.992565.275760@f14g2000cwb.googlegroups.com:
> >>
> >> > Hi all,
> >> >
> >> > I'm a newb, so bear with me.
> >> >
> >> > I'm located in London, ON (42.9391N, 81.3424W). I'm trying to receive
> >> > G10R using a 76cm dish with a 0.6DB LNB. From the Panamsat site, Galaxy
> >> > 10r has an EIRP of about 49, which theoretically means I should be be
> >> > able to get it. I set it all up (Azimuth 238.7, Elevation 25.3, Pol.
> >> > Tilt 35.5) with no trees in my way and I get no signal.
> >> >
> >> > Has anyone near me had any success with this bird? What sites do you
> >> > use to get your Azimuth? I used
> >> > http
/www.emantechnology.com/lookangle.asp, but on another site it
> >> > claimed the satellite was below the horizon for me so I would not be
> >> > able to get it.
> >> >
> >> > Anxiously awaiting your reply,
> >> > Greg
> >> >
> >> >
> >
> > Wow...thanks for all the info Alan. I will get to work on the elevation
> > tonight.
> >
> > Greg
> >
> >
I finally found G10R about a week after posting. Turns out that my
elevation according to the guide on the dish actually had to be set to
35!!
For some pics, you can look here:
http/www.satelliteguys.us/showthread.php?t=85101
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