ENTERPRISE120
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Website:
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Page 13 of 14
Ref: PM-ENT120-002-11022
To check the magnetometer heading information type "
platform
". The third number is the heading
angle in degrees.
This number could be as much as +/- 20 degrees from the correct reading without stopping the
system working. If the error is greater than 20 degrees then this can cause problems.
If required the correct heading can be provided.
Type the command "
platform 0 0 zz
" where zz is the correct heading in degrees.
2.3 Satellite Sweep
The start of the satellite sweep is shown in the diagnostic data.
During this stage the antenna elevation and Pol angles are set to the correct angles for the reference
satellite and a range of azimuth movement is swept looking for an RF signal.
If during this phase a messa
ge is seen reporting a “
horizon scan
” has been started then this indicates
that no RF signal above the noise floor was detected during the sweep. This is an indication that there
is a problem with the LNB of L-band cabling from the LNB to the i-Point ACU.
2.4 Peak on reference satellite
No diagnostic data is provided for this stage but the "cross scan" movements of the antenna can be
seen.
2.5 Identify reference satellite
At the beginning of this step the diagnostic data reports "
Looking at ww
" where ww is the longitude of
the reference satellite.
At the end of this stage there is a line of information which starts "
CTRL
" first number indicates the
satellite longitude being checked. The last number is the number of DVB channels checked.
The second to last number is the number of channels successfully decoded. The success number
should be more than half of the number of channels checked.
If less than half of the channels checked failed to be identified then the system will start to check
channels from oth
er satellites. Once it completes the list of satellites the system will report “
walking
the arc
”. This is an indication that it found an RF signal but was unable to identify it as any known
satellite. In some cases the system will find a satellite which is not the reference satellite, but is one
which it recognises when the channels are checked. If a satellite is recognised the system calculates
a more accurate reading for the platform heading. It indicates the correction of the heading, before
moving on to the next stage.
2.6 Goto target satellite
No useful data is provided here.
2.7 Peak on target satellite
No diagnostic data is provided for this stage but again the "cross scan" movements of the antenna
can be seen.
2.8 Identify target satellites
Repeat of the previous "identify reference satellite" step, this time for the target.
At the beginning of this step the diagnostic data reports "
Looking at ww
" where ww is the longitude of
the target satellite.
At the end of this stage there is a line of information which starts "
CTRL
" first number indicates the
satellite longitude being checked. The last number is the number of DVB channels checked.
The second to last number is the number of channels successfully decoded. The success number
