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Tracking modes
Each satellite can be assigned a single letter code for tracking mode.
Filter Mode (F)
If the selected satellite is marked F in the NID-table, signal detection is made with
a level detector sensitive for signals in the low/mid/high part of the IF-band. Default
is mid-band but the setting can be changed in the tracking section of the service menu.
This mode should only be used in special circumstances e.g. if a particular satellite
does not have any transponders in the frequency band connected to the tuner input.
Tuner Mode (T)
In mode T, the built-in satellite tuner is used for level detection. The tuner only locks
on to signals with the correct frequency, symbol rate and FEC and is suitable if the
NID table contains only one or very few satellites.
Auto Mode (A)
In mode A, the Filter Mode is used during satellite searches and Tuner Mode for
tracking. Provided that the NID-list contains most of the trackable satellites, this is
the preferred mode.
NID-tables
The network identifier or NID-code is a number between 1 and 65535 embedded in
the digital data stream. Each transponder has an NID assigned to the network
provider.
The satellite TV antenna uses the NID in combination with symbol rate, frequency and
FEC (Forward Error Correction) to identify satellites.
Ideally all satellites in the antenna's range should be identifiable to keep search times
to a minimum.
Keeping a database of all the world's satellites is possible but unpractical as scanning
times would be very long. It is therefore useful to limit the number of satellites to those
that are within range, either by using satellite lists specific to a geographical area
or by selecting appropriate satellites in the SatID menu i.e. check marking "In View".
As many satellites have beams directed at different areas, it is possible to enter
several codes and frequencies per satellite. Using a large number increases the
Chapter 5: PC program, maintaining NID-tables
NID-tables
