Parameters Saving; Selecting The Dvb-T Output Mode In Dvbs2-Cofdm (Ci) Transmodulators - Televes T.0X Series User Manual

5.3. Parameters saving

Grabando los
Parametros y
rearrancando
Once a parameter is modified to the desired value
...
in any menu (normal or extended), to save the
settings press for three seconds. The display will
show the following indication:
Saving
settings and
restarting
...
If the configuration paremeters are modified but
not saved, the previous configuration is retrieved
after 30 sec. in other words, the changes are
Parameter
discarded.
gespeichert
& gestartet
...
Sauver les
parametres
de config.
...
Salvando l'
impostazione
...
6. - Selecting the DVB-T output
mode in DVBS2-COFDM
(CI) transmodulators
The standard DVB-T defines various possible
operation modes which enable the DVB-T signal
generated to adjust to the conditions of the
transmission channel. The signal for instance can
travel through a very noisy channel (low C/N) but
will bring with it reception errors. The signal may
also reach the receiver through a number of paths,
one main path and another or various secondary
ones (ECHOES).
GI=1/32
GI=1/16
31.67
GI=1/8
30.74
30.16
29.27
27.14
26.35
24.13
23.42
Put simply, we could say that the DVB-T operation
modes can be characterised by the following:
1 - Type of modulation
2 - Level of protection against Errors
3 - Level of protection against Echoes
In the following chart, one can see a subgroup
of the possible DVB-T modes that indicates the
information service output (Mbits/s) that each one
can transmit.
The greater the information service output of the
DVB-T mode selected, the greater the number of
TV and Radio services which can be transmitted
through the signal.
Information service output (Mbits/s) for
DVB-T signals with a 64QAM modulation
in 8MHz channels.
29.03
GI=1/4
27.65
26.13
24.88
24.88
22.39
22.12
19.91
19
64QAM 7/8
64QAM 5/6
64QAM 3/4
64QAM 2/3
EN