The TBS 6991 with DVB Viewer
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— 03-04/2013
kept quite simple and on the
main screen there are only
six groups that need to be
configured.
• Earth Position: Not nec-
essary, but nice for the report
- it’s the exact geographical
position of the reception an-
tenna.
• Satellite Info: In order to
better compare the reports
at a later time, the current
satellite information should
be entered.
• Style: Here the graphics
display can be set up the way
you like. The thickness of the
lines, the type of curves and
the colors can all be chosen.
There are also two buttons
that determine which of the
two polarizations are dis-
played (H/L, V/R or both).
• Device: Here the TBS
6991 card with the desired
tuner is selected. Addition-
ally, the DiSEqC parameters
can be entered here whereby
CrazyScan makes possible
a cascaded DiSEqC 1.0 and
DiSEqC 1.2 sequence. This is
ideal for more complex sys-
tems with multiple motorized
antennas connected through
DiSEqC 1.0 switches.
• LNB: The frequencies of
the local oscillators are set
here. A drop-down menu
lets you choose the desired
values from predefined LNB
types.
• Interval: Here in this
group the user can enter in
the start and end frequen-
cies of a scan as well as the
frequency step and the po-
larization (H/L, V/R or both).
The Loop option activates a
continuous scan and can be
interesting when, for exam-
ple, the antenna needs to fine
tuned. A small span would be
used that in essence is updat-
ed in real time – almost like a
real spectrum analyzer.
Once all of the parameters
have been configured, you
can press the Scan button. In
just a few seconds an exten-
sively detailed spectrum is
displayed. Even the spectrum
of both polarizations is shown
depending on the configura-
tion. For us the construc-
tion took about 15 seconds
per polarization with fre-
quency steps of 5 MHz. This
resulted in a truly detailed
spectrum. If the frequency
steps are increased to 10
MHz, the construction of the
spectrum needs only about
half the time but in exchange
the spectrum doesn’t look as
nice. At frequency steps of 1
MHz you have to wait a lit-
tle bit but in return you’ll get
an unbelievably high resolu-
tion spectrum display. After
a number of tests we’ve de-
termined that 5 MHz steps is
the optimal value in terms of
detail and speed.
Thanks to the total support
of the TBS 6991, the Blind-
scan function can now be
started. When the appropri-
ate button is pushed, Crazy-
download in ZIP format and
in order for the software to
work a number of additional
files need to be copied into
the same folder. This includes
a StreamReaderEX BDA DLL,
the necessary QT/QWT DLLs
and eventually the Microsoft
Visual C++ 2008 SP1 must
also be installed. These files
can be downloaded from the
CrazyScan Wiki at http://
sourceforge.net/p/crazyscan/
wiki/Home/
Now CrazyScan can be
started. First, though, several
parameters have to be con-
figured. The user interface is
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