Televes COFDM-PAL, Руководство пользователя

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45
User manual COFDM-PAL
ENGLISH
The values that appear next indicate the
input audio level which is needed for the
modulation deviation to be ±50KHz for each
digit on the display of the programmer as
long as there is an input signal of 1KHz.
In other words, if the input signal is 1KHz at
1.7Vpp we have to programme the value 6
in the AL menu of the programmer.
Display AL (dBm)
1 7
2 5
3 3
4 1
5 0
6 -1
7 -2 (1.7Vpp aprox.)
8 -3
9 -5
10 -7
11 -9
12 -11
13 -13
14 -15
i.- Carrier ratio
The following menu lets us select the
carrier ratio (video to audio). The user can
select one of 4 possible values. For exam-
ple:
The relationship between the parameter and
the carrier ratio in dB is approximately:
1 : -12 dB
2 : -13 dB
3 : -14 dB
4 : -15 dB
k.- Frecuencia/canal
The following menu lets us select the fre-
quency / channel mode for the output fre-
quency.
In this case there are 7 possible channel
tables that can be selected via the menu:
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.
The mode is selected by using the &
buttons.
Frequency mode
Channel mode. Table 4 selected.
When going from frequency to channel mode,