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5.13.2 DVB-T/H (COFDM) Digital Channel Configuration
Measurements Configuration
Press the
CONFIGURATION
menu and turn the rotary selector
DVB-T/H
Select the signal
COFDM
modulation are described below:
Channel BW
1)
(channel bandwidth)
Enables the channel bandwidth to be selected between 6 MHz, 7 MHz and 8 MHz.
The selection of this parameter is essential for the correct operation of the tuner,
as it affects the frequency separation of the carriers.
Guard Interval
2)
Guard Interval
The
purpose is to permit a correct detection in multi-path situations. This parameter is
defined according to the symbol length:
turning the rotary selector
and then press it : a menu with the available values will appear. Turning the rotary
selector
[1] select the desired value and finally press it to validate.
Carriers
3)
(Number of carriers)
It defines the number of modulation carriers between
value, place the marker over the
then press it: a menu will appear on the screen. Turning the rotary selector
select the desired value for the Carriers parameter and finally press it again to
validate.
Spectral Inv.
4)
(spectral inversion)
This option enables spectral inversion to be applied to the input signal, though in
the majority of cases it should be in the OFF position (not inversion).
This configuration menu shows, besides the user definable
parameters, the value of the rest of signal parameters detected automatically:
Code Rate
Also known as Viterbi ratio, defines the ratio between the data bits
number and the total number of bits transmitted (the difference
corresponds to the number of control bits for the error detection and
recovery).
Modulations
Carriers modulation. It also defines the system noise immunity.
(QPSK, 16-QAM and 64-QAM).
Page 44
USER'S MANUAL.
COFDM
, which uses
parameter corresponds to the dead time between symbols, its
1/4
,
[1], place the marker over the
Carriers
field by turning the rotary selector and
TV EXPLORER HD / HD
[17] key to access to the
SIGNAL
[1] until the
modulation. Parameters related to
1/8
1/16
1/32
,
,
. To modify its value, by
Guard Interval
2k
4k
8k
,
and
COFDM
LE
option.
field
. To modify its
[1]
signal
10/2012
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