Televes 5056, Руководство пользователя, Страница: 37 / 48

37
User manual COFDM-QAM
ENGLISH
If we worked in channel mode, the selection
of the filter is made internally (based on the
table of channels selected), not appearing
this menu.
d.- Modulation format
If the button is pressed, the following
menu appears. This lets you change the IQ
modulation format (normal or inverted)
using the and
buttons.
Normal
Inverted
e.- QAM symbol rate
If you press the button, you access the
fourth extended menu. This deals with the
real
symbol rate in QAM , for example 3.6
Mbaud:
This information is useful when doing the
IRD programming where you need to know
the exact symbol rate of the QAM modula-
tion.
This is reading-only menu, and so the ,
and
buttons are not operational.
f.- Selection of channel / frequency mode
The following menu allows us to select the
frequency-channel mode for the input and
output frequency.
Frequency mode
Channel table 1
When toggling from frequency mode to
channel mode, the first channel (5) is selec-
ted automatically. When toggling from chan-
nel mode to frequency mode, the frequency
of the channel that was selected is displa-
yed.
There are 7 possible channel tables selecta-
ble using the and
buttons:
Table 1 : CCIR, New Zealand and Indonesia.
Italian channels.
Table 2 : China, Taiwan and CCIR hyper-
band.
Table 3 : M/N, Chile.
Table 4 : Francia.
Table 5 : Australia.
Table 6 : South Africa, K1 (8 MHz), I (Ireland,
8MHz).
Table 7 : Old URSS and OIRT.