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05-06/2013 —
TELE-audiovision International —
全球发行量最大的数字电视杂志
hard time doing anything with
them since the modulations in
use cannot be received with a
normal tuner. And then let’s not
even talk about the encryption
that would be in use.
So what then? All that work
for nothing? Well, no, not really.
For one thing this discovery
excursion into these new fre-
quency territories is interest-
ing; you can also learn a lot
from this. Nevertheless, right
now only those truly dedicated
DXers would have fun in the Ka-
band.
Outside of the USA and Ire-
land, where you‘d regularly find
TV broadcasts in the Ka-band,
there‘s really nothing to receive
for the normal viewer.
This technology is also not
really suitable for DX recep-
tion (long-distance reception)
because of the spot beams that
are used.
Yet there exist entirely new
possibilities: feeds can be sent
very inexpensively to broad-
casting centers as an IP packet
and this is exactly what is al-
ready being marketed by the
company NewSpotter in Italy.
Small cars such as the Smart
are fitted with self-aligning an-
tennas and transmit news feeds
via EUTELSAT 9.0E back to their
headquarters or for events in
outlying areas they can offer
satellite Internet access over
WiFi.
So, there is actually some-
thing going on in the Ka-band!
Comparison
Ku (10.7-12.7GHz) vs
Ka (19.7-20.2GHz)
Each pair shows the respective
satellite in the Ku-Band (10.7 GHz
– 12.7 GHz) and in the Ka-Band
(19.7 GHz to 20.2 GHz). Notice that
a valid signal requires an RF level
above approximately -59 dBm.
EUTELSAT 9A at 9.0E contains
4 transponders in the Ka-Band,
which belong to the TooWay
satellite based internet service.
Using the KWS VAROS 109 it
was possible to see a Ka-Band
transponder on HOTBIRD at 13.0E.
Using an old satellite modem could
get some feedback, but since I had
no valid subscription I could not
further test it.
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