Measuring angles
- Thread starter RimaNTSS
- Start date
- My Satellite Setup
- Some SAT-related hardware.
- My Location
- N-E from Riga
I mentioned several reasons for being able to measure vertical angles. Will speak about one of them now:
If we have some branded dish (dish I mean starting from 1,2m and up) we usually know it's offset angle, we also know exact location of dish and elevation of receiving satellite (it is better to use most Southern satellite). So, if we measure precisely angle of leaning of the dish "face" or line AB I showed on some pictures, than we indirectly can check whether LNB's phase center is located in antenna's focus.
Perhaps it is not really necessary to measure leaning of dish with precision up to 0.01, but why not if 2,5m long tool can provide this possibility?!
Another reason to be able to measure angles precisely is: reception results are nothing without comparison. If we get some signals from satellites we can not say they are maximum, we simply do not know they can be better, we believe we spent lots of time tuning antenna and nothing can be improved! So, in reality, we can only say we have some reception, even if it is fringe one.
If we have some branded dish (dish I mean starting from 1,2m and up) we usually know it's offset angle, we also know exact location of dish and elevation of receiving satellite (it is better to use most Southern satellite). So, if we measure precisely angle of leaning of the dish "face" or line AB I showed on some pictures, than we indirectly can check whether LNB's phase center is located in antenna's focus.
Perhaps it is not really necessary to measure leaning of dish with precision up to 0.01, but why not if 2,5m long tool can provide this possibility?!
Another reason to be able to measure angles precisely is: reception results are nothing without comparison. If we get some signals from satellites we can not say they are maximum, we simply do not know they can be better, we believe we spent lots of time tuning antenna and nothing can be improved! So, in reality, we can only say we have some reception, even if it is fringe one.
- My Satellite Setup
- Some SAT-related hardware.
- My Location
- N-E from Riga
And forgot to say, that here we can connect theory and practice! Those who have digital protractors could measure leaning of the dish (line AB and announce resulting angle, location, tuned satellite (no cheating ;)) and dish model.
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Trust
Specialist Contributor
- My Satellite Setup
- 1.2 m Echostar at Twotec twinrotor with lnb changer
- My Location
- Nijmegen Netherlands
I think it make no sense to messure that angle with even 0.1 degree .
at first the dish should be adjusted with the lnb covered with a wet towel and a secure satmeter .
With this senstive Lnb's we have nowedays and the strong signals , you can move the dish within 2 degrees up and down without any reaction at the signalbar of the receiver .
at first the dish should be adjusted with the lnb covered with a wet towel and a secure satmeter .
With this senstive Lnb's we have nowedays and the strong signals , you can move the dish within 2 degrees up and down without any reaction at the signalbar of the receiver .
- My Satellite Setup
- Some SAT-related hardware.
- My Location
- N-E from Riga
We know (on branded dishes) offset angle with the precision up to 0.1* and we also know elevation of satellites with the same precision. So, why do not we use antenna's face leaning (measured) as a check point?
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Archived-1
Persona non grata
- My Location
- uk
The best way to conclude all this IMHO, is start posting your results in the fringe reception threads where all this counts to 90% of us at a guess.
Riverblue
Regular Member
- My Satellite Setup
- See Signature
- My Location
- Near Brighton
I like "talking" and doing "bugger all"
Archived-1
Persona non grata
- My Location
- uk
Yes hard to do, But I can say I can match most peeps uk 1.2 setup, via posting and playing with fringe reception here in the uk, so at a guess I have tweaked my dish very well 
, can you say the same 
, can you say the same
- My Satellite Setup
- Some SAT-related hardware.
- My Location
- N-E from Riga
I can say so, but I can not say something like: I installed it perfectly and nothing to be done to improve reception!I have tweaked my dish very well
Can you say so, Martin?
Archived-1
Persona non grata
- My Location
- uk
I can say so, but I can not say something like: I installed it perfectly and nothing to be done to improve reception!
No sorry I cant Rimants, I am always looking for that little bit more
, but if you put all your theories to practice and posted your results in the fringe threads and you was getting good results, I would listen and do as you do .But until then I am a critic
sorry The proof is in the pudding is my believe
Riverblue
Regular Member
- My Satellite Setup
- See Signature
- My Location
- Near Brighton
Yes hard to do, But I can say I can match most peeps uk 1.2 setup, via posting and playing with fringe reception here in the uk, so at a guess I have tweaked my dish very well
I agree with you totally there Martin, likewise with my 1.0m CM motorised set up, I've noted it does well against other installs,
I'm confident I couldn't get much out of it . . . . without redesigning it!
- My Satellite Setup
- Some SAT-related hardware.
- My Location
- N-E from Riga
If you are ready to wait ~5 month than let's go for that.
Archived-1
Persona non grata
- My Location
- uk
That's fine Rimants, I would just like to see the results of the projects you've been doing, I think the theory has been explained now, I would like to see you move to the practical side and monitor results with people around you, but that is up to you pal
skomedal
Regular Member
- My Satellite Setup
- This and that
- My Location
- thule
Yes fringe reception is the main feature here.
Live near the so called first null line for astra2 uk spot beam reception, have tuned my 125 gibi too receive 2E uk spot beam BBC etc, with day time reception SQ @ 80% but when the sat does its daily wobble nothing from ~1900 cet until next day. Only uk PSB spot beam channels are affected.
I say tuned as I do not get a sniff of the 2F bird.
Will not get into discussions on how the dish is tuned, its ~1,5 meters above ground level so easy access, done by trial and error and loads of patience.
Regards
Live near the so called first null line for astra2 uk spot beam reception, have tuned my 125 gibi too receive 2E uk spot beam BBC etc, with day time reception SQ @ 80% but when the sat does its daily wobble nothing from ~1900 cet until next day. Only uk PSB spot beam channels are affected.
I say tuned as I do not get a sniff of the 2F bird.
Will not get into discussions on how the dish is tuned, its ~1,5 meters above ground level so easy access, done by trial and error and loads of patience.
Regards
- My Satellite Setup
- Some SAT-related hardware.
- My Location
- N-E from Riga
While family was shopping in shop I do not like, I went to "normal" shop and found aluminum plank which does not bend easily. 2,5m and 1,8 meters where available, so, I took 1,8m one, enough to work with 1,2m antennas.
I will not use this plank for precision measuring of angles directly, but by putting it over antenna's face I will be able to measure antennas depth and elevation with help of additional tools with the precision up to 0,1* and 0,1mm.
I will not use this plank for precision measuring of angles directly, but by putting it over antenna's face I will be able to measure antennas depth and elevation with help of additional tools with the precision up to 0,1* and 0,1mm.