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TELE-audiovision International — The World‘s Leading Digital TV Industry Publication
— 03-04/2015
—
TELE-audiovision.comReference
Measurement:
1. If you need to determine the
accuracy of a meter, it is best to
use it with a calibrated reference
signal. So we set out with crea-
ting a signal at 1000 MHz with a
signal strength of -40 dBm.
2. This signal was measured
with the Spaun Sparos 711 with
a minimal deviation of only 1.4
dBm. But that’s only half the
truth. In addition to its accuracy,
it also presents the 10 MHz
span with a tremendous level of
detail.
3. We measured the same signal
with one of our reference meters
for comparison. At the 1000 MHz
frequency the measurement
deviation was even below that
of the reference meter. And we
don’t want to even start with
the Spaun Sparos 711’s 10 MHz
spectrum resolution.
4. We then repeated the test with
a 1500 MHz signal.
5. Here, the measurement result
of the Spaun Sparos 711 was
almost identical to that of our
reference meter.
6. The result with our reference
meter and slightly adjusted filter
settings.
7. The last tested frequency was
2000 MHz.
8. With such a high frequency,
signal attenuation caused by
cable length becomes an issue.
The Spaun Sparos 711 perfectly
displayed the exact attenuation.
9. Depending on the used filter,
our reference meter arrived at
the same result.
10. We also wanted to find out
how the Spaun Sparos 711
behaves across the entire band
from 950 MHz to 2150 MHz and
to that end activated the sweep
function of our reference signal
generator in order to create a
signal strength of -35 dBM with
steps of 10 MHz.
11. On the other end of the line,
we turned on spectrum mode
with active Max Hold function
in the Spaun Sparus 711. After
a few minutes the meter had
created the spectrum shown in
the image. The result is nothing
short of impressive, since the
Spaun meter was able to detect
a constant signal with a signal
level of -35 dBM and with only
the slightest of deviation. To be
honest, this result can be expec-
ted from a lab testing instrument
rather than a conventional TV
signal meter!
the Spaun Sparos 711 fully
supports unicable networks,
the specifics of which can
easily be taken care of in the
LNB/DiSEqC menu.
We instantly fell in love with
the main screen in measure-
ment mode, which can be
called up using the TV but-
ton. What’s so special about
it? The Spaun Sparos 711 is
capable of displaying all rel-
evant measurement results,
a section of the spectrum,
live video of the transponder
(unless it is encrypted) and
transponder information si-
multaneously and in real-
time. Actually, this is a great
example of the Spaun Sparos
711 putting its huge screen