depends where your located
Just got a Sharp dual LNB and set it up to get fo>< and Aurora off the same dish, but for the life of me cant find a skew that gets both working at the same time ? Can anybody else confirm if they have it working and if so, what "O'Clock" do you have the skew at?
7 O'Clock get F0>< and 4 O'Clock gets Aurora.....in the middle dont work....
????
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depends where your located
G'Day,
All subscribers and Transponders on Optus Satellites employ the same Skew.
The difference between 7 and 4 O'Clock is 90 Degrees.
That is the difference between H and V polarities.
To get all transponders on the one satellite, input the correct frequency and polarity of each Transponder and adjust the LNB for max on either a H or V TP, then all the others will be correct.
As a rule of thumb, the downlead should be at 7 for the Eastern and 4 O'Clock for the Western States.
Skew is dependent on essentially Longitude, to a lesser extent on Latitude and to the attitude of the Satellite. Optus are about 40 degrees different to most other Satellites.
Edit: I know i'ts asking the obvious, but how many downleads do you have?
Is it a Single/dual output, or a Twin/ dual output LNB?
Kindest Regards, " The Druid ".
Last edited by beer4life; 19-11-09 at 08:02 PM.
As the vertical Aurora transponders are mostly weaker than the horizontal Foxtel transponders, I peak the skew for Aurora.
The Foxtel transponders still work fine with that setting.
In theory, both vertical and horizontal transponders on the same satellite should have the same skew, but in practice, I've found the BER and MER skew adjustment readings on my spectrum analyser are slightly different.
Not a lot, but enough to make a difference on reception reliability with marginal signals. eg: cloud cover/rain fade.
OSIRUS (20-11-09)
Thanks B4L....I'm not in a panic....I'm moving house and am currently pulling my dishes down....I have just thrown this duel LNB on to test how it works...Ive always used singles's before.....
I had two dish's up, both on C1 one for Aurora and the other for fo><. I have stuck the dual lnb on one of these dishs and moved the cable from the other dish to the dual lnb.
I then checked the TV and fox was working and aurora down....tweeked it a bit and had it going the other way.....i was yelling out to a 6 year old confirming signal, so from what i gathered we never found a position where both had pictures...
As for is it a Single/dual output, or a Twin/ dual output LNB?......Ummmmm...didnt know they existed like that.....i probably bought a single dual......that's probably the problem...
here is a picture
When In Doubt - Make It Into A Coffee Table.
I thought it was straight forward stuff....ill suss it all out when i relaunch my dishes in a few weeks....but just after mucking aground for 20 minutes was surprised that i could get a hot spot to get them both.....maybe i'll try them on a bigger dish or the move footy shaped (east - west) foxtel dish.....
When In Doubt - Make It Into A Coffee Table.
in the bad ol days I think one was called a dual....or was it a twin....or a twin dual output or a dual output twin or something. Anyway they don't sell that one anymore otherwise I would be confused!
.....Leroy
XCRUISER HDSR600HD twin sat and terrestrial receiver $OOS *
XCRUISER HDSR385 Avant - sold out$OOS UltraPlus DVB-T and DVB-S2 tuners $49 Remotes $OOS
Just to clarify,
A normal LNB has one downlead which has dual polarity output. H/V switchable.
A Twin/Dual output is more or less two of the above in one package.
These are used either with one or more STBs for independent H or V channel selection and with multiswitches, many STBs.
You need one of these for twin tuner STBs like the IQ2, but there is nothing to stop you using for a single STB. It's wise to seal off the unused connection.
When In Doubt - Make It Into A Coffee Table.
I am sure my Austar dish is using one of those Sharp duals connected to a multiswitch (not splitter/divider) 3 legs fo Austar stb's, one leg to the Humax on Aurora and they all live happily together.
The last I checked, Aurora was still the weakest of the 2 signals on C1 and now D3 is even stronger so I would lean to setting the LNB for the best signal on Aurora.
dual polarity = Horizontal and Vertical
twin output = two cables
troy boy - yours is dual/twin = H + V + 2 Cables
you should get aurora and foxtel on that on one dish
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Thanks Mate.....I'll tweek it to Aurora when I get into my new joint and see how it goes, at the moment it sitting on a Motek thats not hooked up (as I bypassed it to try the twin outputs), so my setup is a little bodgy ATM as Im dismantling to move house....
These shouldnt need a multiswitch or any type of switch for that matter, 2 cables straight down, one cable in each box...
When In Doubt - Make It Into A Coffee Table.
my sharps are a dual polarity dual output ;P
XCRUISER HDSR600HD twin sat and terrestrial receiver $OOS *
XCRUISER HDSR385 Avant - sold out$OOS UltraPlus DVB-T and DVB-S2 tuners $49 Remotes $OOS
When In Doubt - Make It Into A Coffee Table.
I thought twin output had H polarity on one output and V polarity on the other?
Troyboy you've got the correct LNB for the job anyway.
XCRUISER HDSR600HD twin sat and terrestrial receiver $OOS *
XCRUISER HDSR385 Avant - sold out$OOS UltraPlus DVB-T and DVB-S2 tuners $49 Remotes $OOS
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