92 lines
3.2 KiB
HTML
92 lines
3.2 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
|
|
<HTML>
|
|
<HEAD>
|
|
<META NAME="GENERATOR" CONTENT="SGML-Tools 1.0.9">
|
|
<TITLE>Sat (Satellite Technology) HOWTO: Base setup</TITLE>
|
|
<LINK HREF="Sat-HOWTO-6.html" REL=next>
|
|
<LINK HREF="Sat-HOWTO-4.html" REL=previous>
|
|
<LINK HREF="Sat-HOWTO.html#toc5" REL=contents>
|
|
</HEAD>
|
|
<BODY>
|
|
<A HREF="Sat-HOWTO-6.html">Next</A>
|
|
<A HREF="Sat-HOWTO-4.html">Previous</A>
|
|
<A HREF="Sat-HOWTO.html#toc5">Contents</A>
|
|
<HR>
|
|
<H2><A NAME="s5">5. Base setup</A></H2>
|
|
|
|
<H2><A NAME="ss5.1">5.1 First: mounting</A>
|
|
</H2>
|
|
|
|
<P>The first thing we have to do is to mount our parabolic antenna;
|
|
<P>After we need to pointing it out (searching right degrees from some magazine):
|
|
degrees are always intended from south to east or to west for horizontal one
|
|
and from ground to satellite line for vertical one. Classical pointing tools
|
|
is the compass.
|
|
<H2><A NAME="ss5.2">5.2 Calibrating</A>
|
|
</H2>
|
|
|
|
<P>How can we see if we are right oriented?
|
|
<P>After decided a right range of angles, we have to adjust it measuring power
|
|
level. For such a thing we can
|
|
<P>
|
|
<OL>
|
|
<LI>Use for example an analog receiver (which is compatible with digital converter)
|
|
and start to search right degree: when we see some imagine we'll get it. I
|
|
suggest to use analog converter cause, maybe, you have one (from precedent
|
|
installation) and cause it is more simple to calibrate it than digital one.</LI>
|
|
<LI>Use a power meter (about 20US$) with sequential lights: at full
|
|
signal all lights turn up.</LI>
|
|
</OL>
|
|
<H2><A NAME="ss5.3">5.3 Double Feed</A>
|
|
</H2>
|
|
|
|
<P>You can also install a double feed system (some vendors sell a complete
|
|
kit with standard distance to receive, for example, Astra (19.2 SE) with Eutelsat
|
|
(16 SE) or with HotBird (13 SE).
|
|
<P>For mounting it you have to consider, in addition, that satellite is at
|
|
the opposite side of the converter, like in figure:
|
|
<P>
|
|
<PRE>
|
|
SAT1 SAT2
|
|
\ /
|
|
\ /
|
|
\ C1 C2 /
|
|
\ \ \ / / /
|
|
\ \ / \ / /
|
|
\____\ /___\ /_____/
|
|
|
|
Top View
|
|
|
|
C1 receives from SAT2
|
|
C2 receives from SAT1
|
|
</PRE>
|
|
<P>Also, with 2 focus, you would use a diseq.
|
|
<H2><A NAME="ss5.4">5.4 Data-link level adjusting</A>
|
|
</H2>
|
|
|
|
<P>Once we got analog signal we have to adjust our receiver to right frequency,
|
|
PID, speed rate and so on.
|
|
<P>I report here an example of configuration, for EON (EuropeOnLine), transponder
|
|
114 on Astra satellite (19.2 SE)
|
|
<P>Frequency: 12640 MHz
|
|
<P>Polarization: V (Vertical)
|
|
<P>Symbol Rate: 22000 KS/s
|
|
<P>PIDs:
|
|
<P>
|
|
<UL>
|
|
<LI>Unicast: 512 (decimal), 0x200 (hexadecimal)</LI>
|
|
<LI>Multicast: 785, 786, 1041 (decimal), 0x311, 0x312, 0x411 (hexadecimal),
|
|
but you should notice that, in many cases, Multicast PIDs are taken in automatic.</LI>
|
|
</UL>
|
|
<P>We also need another info: what MAC address to assign to our DVB card.
|
|
<P>
|
|
<P>Again, for EON you can see Appendix A to calculate MAC address from dynamic
|
|
IP address.
|
|
<P>Obviously you need login and password to use ISP service.
|
|
<HR>
|
|
<A HREF="Sat-HOWTO-6.html">Next</A>
|
|
<A HREF="Sat-HOWTO-4.html">Previous</A>
|
|
<A HREF="Sat-HOWTO.html#toc5">Contents</A>
|
|
</BODY>
|
|
</HTML>
|