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Subject: Re: Pace SS9000 Tuning range?
From: nigelg@lpilsley.demon.co.uk (Nigel Goodwin)
Date: Fri, 12 Sep 97 18:30:00 GMT
Message-id: <874089000snz@lpilsley.demon.co.uk>

In article <memo.19970912160611.176A@khodges.compulink.co.uk>
           khod_nospam@cix.compulink.co.uk "kevin hodges" writes:

> Due to the demise of my trusty old Gensat receiver I have been
> trying to get this pace SS9000 working, which had been given to
> me some time ago. The trouble is that all the channels seem to
> be 250 Mhz higher in frequency than they should be. I have
> tried another lmb but that go's the other way.
> I assume that the receiver tunes 950-1750 Mhz
> with the aid of a spread sheet I calculated the tuning rages
> below, assuming that I have the LMB Local Oscillator
> frequencies correct ?
> with a 9.750Ghz LO LMB the Tuning range is 10.700-11.500Ghz
> with a 10Ghz LO LMB the Tuning range is 10.950-11.750 Ghz
> with 11 Ghz LO LMB the Tuning range is 11.950-13 Ghz
> so the question is why is it 250 Mhz higher in frequency and
> what is the tuning rage of this receiver

You are quite correct, the tuning range is 950-1750MHz, and the receiver is
designed to work with a 10GHz LO LNB only. It sounds like you have an
emhanced (9.75GHz LO) LNB, this requires you to add 250MHz to all your
tuning settings - so if you wanted to receive 11.000GHz you would enter the
frequency as 11.250 in the tuning menu.

The only problem is that you will loose the highest frequencies, but you will
get the Astra 1D frequencies in their place!.


Subject: Re: Putting up a  sat dish
From: "David A White" <David.White@pito.org.remove>
Date: Fri, 12 Sep 1997 01:43:38 GMT
Message-id: <01bcbf1e$0d8252a0$57f627c1@lemon.pito.org>

Suggest you get a back copy of What Satellite magazine's 1997 equipment
tests as this contained a good series of articles about DIY installation. 
I found this invaluable when I put up my (motorised) system a few months
ago.  A few points to consider:

The larger the dish, the stronger the signal,, the more accurately it has
to be positioned, because it should have a more precise focal point.

You will need to determine true south to set the azimuth.  I did this from
the Sun - a compass is less accurate, albeit useful for the preparation.

You will need an inclinometer - or a protractor and a spirit level - to set
the elevation.  I used the latter.

In order to precisely point a fixed dish at a single satellite location you
will need either a fairly pricey signal meter - or the much cheaper 'damp
tea towel' method, where you adjust the dish whilst progressively
attenuating the signal with a damp tea towel across the dish face.

If you just want to pick up Astra and you live in the UK, then simply point
your dish in the same general direction as everyone else's and then fine
tune it to get rid of the sparklies in the picture.

If you want to point at another bird or install a motorised multi-satellite
system then this can be more challenging, but well worth it for the sense
of satisfaction.  I used a spreadsheet to calculate the azimuth/elevation
etc. and it worked fine.

Standard employer-employee disclaimer applies.
N.B. please remove <.remove> from address when replying.

Simon Baker <sb5917@ncs.bris.ac.uk> wrote in article
> Can anyone point me to a resource that explains how to fix up a satellite
> dish and point it in the right direction. How exact does it have to be?
> Will I need a compass? Is it easy to do? Does anyone have any experiance
> of doing so. 

Subject: Re:  dual / twin LNBs
From: nhyamd@hasler.ascom.ch (David Hyams)
Date: 10 Sep 1997 10:02:08 GMT
Message-id: <5v5r70$a65@ascomax.hasler.ascom.ch>

Thanks to everyone who replied. Unfortunately I might have a problem,
as you'll see in a moment...

First, here's the reply from Wolfgang Litzinge:

In article <341648D5.4917FDF2@rhrk.uni-kl.de> you wrote:
> A Twin LNB is two LNB's in one. You can connect two receivers.
> A Dual LNB is a LNB with one output for horizontal and one output for
> vertical. You have to ues dual-LNB's with multiswitches.
		oh oh...

OK, here's the full story. I have an 85cm dish, with 1 twin lnb feeding
2 receivers. The idea is to extend this for Astra and Eutelsat, feeding
a total of 4 receivers (2 families living in one house). The 3rd receiver 
is due in a couple of weeks, so I'll need a multiswitch and at least one 
new lnb.

A few weeks ago I was in Conrad and accidently bought a dual lnb,
as I didn't realise there was a difference between twin and dual lnbs.
Last Saturday I was in Conrad again and explained my mistake.
I then carefully asked which lnb I should keep (the dual or the twin),
which lnb I should now buy, and whether this would all work with
the 4x4 multiswitch that he was ordering for me. The end result was 
that he took the DUAL lnb back, and ordered another TWIN (he didn't
have any more in stock). He also said that the multiswitch WOULD
work with 2 TWIN lnbs.

Unfortunately Wolfgang writes that multiswitches need DUAL lnbs, despite
the fact that I'm soon going to have 2 TWINs. Does this means that
I've been given the wrong information from Conrad, or is it 
true that multiswitches can indeed run with twin lnbs? Maybe older
multiswitches needed dual lnbs, while newer ones can also use twins.
Or maybe I'm just totally confused and don't know what I'm talking

Any help would be appreciated!

BTW, we had a disk failure here recently, losing a couple of days news.
If my questions have already been answered then I apologise.


David Hyams

Subject: Re: dual / twin LNBs
From: taeuber@cww.de (Dirk Taeuber)
Date: Wed, 10 Sep 1997 17:32:09 GMT
Message-id: <3416d3e8.2162089@news.cww.de>

On 10 Sep 1997 10:02:08 GMT, nhyamd@hasler.ascom.ch (David Hyams)

>Unfortunately Wolfgang writes that multiswitches need DUAL lnbs, despite
>the fact that I'm soon going to have 2 TWINs. Does this means that
>I've been given the wrong information from Conrad, or is it 
>true that multiswitches can indeed run with twin lnbs? Maybe older
>multiswitches needed dual lnbs, while newer ones can also use twins.
>Or maybe I'm just totally confused and don't know what I'm talking
>Any help would be appreciated!

If you want to use a TWIN-LNB you has to have a receiver which is able
to switch between 14V and 18V (horizonal and vertical polarisation).
You can directly connect 2 receivers on each exit of the LNB! Is it
your intention to connect more as 2 receivers on the TWIN, then you
must use a multiswitch.

For a DUAL-LNB you needn't a multiswitch, because it have two exits
(on with horizontal and one with vertical polarisation). To devid up
these signals to more than 2 receivers you must only use a
distributor. Disadvantage: The receiver has to have two entries (one
for horicontal, one for vertical polarisation).

Because you want to connect ASTRA and Eutelsat it is better to use a
second TWIN-LNB. To switch between these satellites a multiswitch and
receiver with 22kHz technology is necessary (for use with one entry in
receiver). If you have a receiver with two entries, then you needn't
22kHz technology.
Good luck!

Dirk Taeuber


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