STAB HH120 won't go to 57E

fat-tony

I've just replaced my Moteck with a proper Stab HH120 to suit my 1.1m dish. Replaced the old wall mount with a set of K and T mounts, so the whole setup is a lot more solid. Apart from how slow (but not as whiney) the Stab is in comparison with the Moteck, it seems to be much more substantial so I hope I won't have any further problems when we next get a gale!

My issue is, though, that the USALS function on the receiver doesn't seem to get any response from the motor when I select 57E. I can get 53E ok, but even driving the motor with the controls on the receiver I don't get much further East. I'd guess it's going to 55 or 56 East. The spec says the hardware limit East and West is 70 degrees, with a software setting of 65 degrees. With my location of 6W, plus the 57 degree East rotation, I would have assumed I would just get away with it but no dice:( 57E was no problem with the old Moteck. I have turned off software limits in the Mvision, so it shouldn't be that.

Anyone have experience of getting 57E with a Stab HH120?

watty

I get that at 53N 5W you need 113 degrees for 57E

Which is 67 from true south.
you need a SW limit of 68 at least.

Download this
http://www.smw.se/SMWLink.htm

to see what I mean

Northing = Latitude
West = -Longitude
180-Azimuth = Motor rotation from true south.

Can you actually get 57E?


http://www.lyngsat.com/nss703.html
http://www.lyngsat-maps.com/maps/nss703_spot1.html

You'd want about 2m or more dish
Elevation is about 7.8 degrees only.

Any less than 10 degrees you have huge problem with ground noise, unless the ground falls to SE.

Any buildings to SE need to be well away.

There four Ku Transponders. C band would be easier on west Hemi beam, non-existant on Global beam and poor on NE beam.

fat-tony

Hi Watty,

Yes - I can receive the 12551V transponder. It's no major heartbreak not to be able to receive it now (only some ladies on telephones and some English language movies with Bulgarian subtitles), but it's a bit of a bummer being restricted by the motor rather than by the location. I'm in a housing estate, but my house wall faces due South and I have a clear view to the East and West so I can see from 57E to 58W.:)
My new setup has worked pretty well, but I think I need to nudge the motor elevation a bit as I'm having problems locking Badr on 26E. I'm getting 50% quality on Dubai One now, with the signal dropping out of lock on occasions, whereas I was getting a solid 70% quality reading before. The thing is, I'm getting signal on all sats, but I think the signal level is down on the central part of the arc. For instance France 2 on 5W is at 98% quality, but 75% signal level, where before the signal level was higher.

fat-tony

I spent some time looking at various forums and downloaded Gorbtrack (which provides vast quantities of data!) and came to the conclusion that the actual angle that the motor need to turn to was 67 degrees, which is beyond the capabilities engineered into it. Bit of a misnomer calling it a HH motor (horizon to horizon), when it doesn't:rolleyes:

snaps

i find with my motorised setup i had to skew the lnb a bit clockwise for 26east to get a great signal. I was experimenting the other day on a sunny day when i achieved the best signal ive ever got on 26east (MBC channels) with a .2 single output titanium lnb. I tried various lnb's some .1's and some .3's, the titanium seems to be the best performer all round with quite a huge difference in signal strength on the weaker birds (Especially 26east). Ive a TM6900 linked up at the moment to my 1.1m and ive now achieved a signal of 68% on MBC transponder (Clear blue sky) and an avergae of 66% in overcast conditions. Dubai one transponder is very very strong coming in around 75% most of the time.

26east is a handy satellite to receive, Some great stuff on the mbc channels, especially mbc action and mbc max.

Youve got a great line of sight there H to H, I can see about the same west as you but anything east of 39 is a no no due to the height of my dish and surrounding houses, but theres no way im putting my dish up any higher! As the back is so open to the south west the winds coming gushing in!!

fat-tony

Spent an hour or so this afternoon tweaking the dish settings. I had found that USALS was parking the dish slightly on the Western side of each satellite, despite having been careful with the setup on Thursday. Having studied the situation for a while I came to the conclusion that the dish needed to be nudged Eastward on the motor pole, as moving the whole assembly on the mounting pole would have shifted the arc and I was pretty much on it at the extreme ends. Once I moved the dish a tad, the signal strength and quality improved on USALS . I sorted out BADR by a tiny bit of declination adjustment on the dish - quality went up to 60ish %. Further checks confirmed the adjustment was good as all satellites increased a bit in signal strength. The quality didn't change much on the more powerful transponders - still at 98-99%, but the strength reading went up. It surprised me how such a little change even in tightening the U-bolts on the dish made all the difference to whether the box locked on a particular transponder or not. The characteristics of a 1.1m dish are just so less forgiving in pointing inaccuracies than an 80 or 90cm. I've had a motorised system for about 5 years now, so I'm used to the vagaries of set-up, but it must be really difficult for a newbie to get it right.

Anyway - all good now, so no more excuses to keep me away from domestic duties!

watty

I did say you needed 67


Download this
http://www.smw.se/SMWLink.htm