| Subject: Re: What has he got that I havenīt part two |
Author:
iain
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Date Posted: 06:12:02 11/14/03 Fri
In reply to:
iain
's message, "Re: What has he got that I havenīt part two" on 06:10:41 11/14/03 Fri
>>>>>2)What Corrigap said - how do you know you are on
>2D
>>>>>and not 2A - I seem to have the right beam ( from
>>>>>memory it is 0002 and 07d4 ? ).
>>>>>
>>>>
>>>>No, what I said was;
>>>>
>>>>My next step would be to check the alignment of the
>>>>dish very carefully. Being perfectly aligned on 2a
>>and
>>>>b does not necessarily guarantee perfect alignment
>on
>>>>2d. Sometimes, a movement of a couple of mm can make
>>a
>>>>big difference.
>>>>
>>>>meaning that maximizing the signal is a lot more
>>>>difficult on 2d than it is on 2a/b. The
>significantly
>>>>lower power level (39 watts) from 2d makes exact
>>>>alignment extremely critical. You will need an
>>>>alignment that is absolutely spot-on for 2d.
>>>>Adjustments for 2d should always be done using 2d
>>>>(low-band)frequencies, whether you're using
>>>>professional equipment or just the signal bars on
>the
>>>>digibox. I found on many occasions when aligning my
>>>>dish that even just pressing lightly on the sides of
>>>>the dish (to give a horizontal movement) was enough
>>to
>>>>affect the signal level noticeably, i.e. a movement
>>of
>>>>no more than a few mm could lose or get back the
>>>>signal.
>>>>
>>>>If you are going to attempt to get a usable signal
>>>>from 2d in these parts on a 1.5m dish, then every
>>link
>>>>in your signal chain has to be working at maximum
>>>>efficiency. But even if you do succeed in getting
>>24/7
>>>>reception in clear weather, you won't have any real
>>>>bad-weather margin to fall back on.
>>>>
>>>>BTW, I beg to differ with Rich about the Panny 30
>>>>being the answer to your problems. It's a good box
>>but
>>>>it won't make a silk purse out of a sow's ear - if
>>>>you'll pardon the expression. I don't think any
>>>>digibox can cope with the deep trough that the 2d
>>>>signal falls into twice a day in this part of the
>>>>world (i.e. after 11.00 and again after 19.30)when
>>>>connected to a 1.5m dish. I struggled bravely with
>my
>>>>Panny 30 on a 1.5m Gibertini with an MTI flanged LNB
>>>>not a million miles away from you.
>>>>
>>>>I can't say, either, that I've ever noticed any
>>>>difference from tweaking the skew on any of the
>>>>dishes/LNBs that I've used.
>>>>
>>>>There's only one real fix for a weak signal - a
>>bigger
>>>>dish.
>>>>
>>>>Corrigap
>>>
>>>
>>>It's not that simple. The system is only as good as
>>>the weakest part. Some boxes are simply no good in
>>>fringe areas even with a bigger dish (like you say
>>>silk purse/sows ear).
>>>It's because the tuners are not selective enough. The
>>>tuner picks up the stronger 2a/b signals and sets the
>>>gain according to those. A bigger dish may even make
>>>it worse!
>>>
>>>So start with a panny 30 and work from there.
>>>/iain
>>
>>If you read the thread properly, you'll see that my
>>comments about 'silk purse and sow's ear' were made in
>>the context of a 1.5m dish not being enough *together
>>with a panny 30* in this part of the world (southern
>>Sweden). It was/is my belief that if Brian upgraded to
>>a Panny 30 with his 1.5m dish, he would have got the
>>same disappointing results that I had with that
>>particular combination. He and I only live a short
>>distance from each other.
>>
>>I agree that some boxes are no good in fringe areas
>>and that 'the system is only as good as its weakest
>>part', which I more or less said in my post.
>>
>>I was trying to pass on my own experience of having a
>>1.5m Gibertini and a panny 30, which was not a
>>fully-working 2d system until I upgraded to a 1.8 m
>>Channel Master. Now I have almost perfect reception
>>24/7. So in this particular case, based on personal
>>experience, I don't agree that a new box is the way to
>>go initially; the safer bet as far as I'm concerned
>>would be a bigger dish first and *then* a better
>>digibox, if necessary.
>>
>>Corrigap
>
>Sorry don't agree. Maybe a 150 is not big enough with
>a panny where you are. I haven't said otherwise. I'm
>just saying that "without a panny" or some equivalent
>box that works well in fringe areas it may not matter
>how big the dish is. I agree the only way to get more
>signal strength to the box is a bigger dish. But that
>won't help if the box can't use it properly. So what I
>mean is "you can't make a silk purse out of a sow's
>ear of a box".
>
>Large dishes are expensive a 2nd hand panny costs
>around Ģ150. So I would start with the panny and work
>up with the dish if possible.
>
>If you read the thread properly you'll see the
>original posting referred to a someone else in the
>area with an almost identical system. The question was
>"what's he got that I don't?". The answer is a
>different box.
>
>I agree with you on the skew though. I've never found
>that made a lot of difference unless it's way out.
>
>/Iain
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