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TELE-audiovision.com—
03-04/2015 —
TELE-audiovision International —
全球发行量最大的数字电视杂志
DVB-T2
Measurement
39. Measuring a DVB-T2 trans-
ponder that was generated at
the test center. We deliberately
wanted a less-than-perfect
signal.
40. All important information is
shown in a single screen in the
main measurement window.
41. While some meters are
capable of showing a cons-
tellation diagram for a shifted
256QM signal, the Spaun
Sparos 711 was the first meter
we had ever used that could
actually also present the video
content of that signal, thanks to
the high resolution with 1280 x
720 pixels.
42. In measurement mode the
meter presents all reception
parameters, which of course
can be edited. But you don’t
have to deal with those para-
meters at all if you use the
Auto Lock button. The Spaun
Sparos 711 will identify them in
a matter of seconds.
43. We significantly reduced
signal quality for this test,
and it shows in the constella-
tion diagram. Instead of small
clouds scattered over the
screen these have increased to
cover whole quadrants. Here,
too, the changing conditions
can be observed clearly thanks
to the high-resolution screen.
44. Yet, the low-threshold tuner
can lock the signal perfectly
and present flawless video.
Der Spaun Sparos 711 ist ein ideales Messgerät, um auch professionelle
Receiver, Modulatoren, Encoder oder Multiplexer zu prüfen. Der ASI-
Eingang gibt Aufschluss, ob diese Geräte einen korrekten Transport
Stream ausgeben.