Televes 5079, User Manual

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g.- Audio deviation
By pressing the button, it is possible to
access the following menu, where we can
choose the
audio deviation (audio level).
There are 14 possible values (from 1 to 14)
that can be selected using the
and but-
tons. For example. 5:
The values that appear, indicate the input
audio level for each digit on the display of
the programmer which is used to make the
modulation deviation ± 50KHz 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 program the value 4 into
the AL menu of the programmer.
h.- Video/audio power ratio
The following menu allows us to select the
carrier ratio (video to audio). There are 8
possible values (between 1 to 8). For
example, 5:
The relationship between the parameter with
the carrier ratio in dB is approximately:
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
1 : -11 dB 5 : -15 dB
2 : -12 dB 6 : -16 dB
3 : -13 dB 7 : -17 dB
4 : -14 dB 8 : -18 dB
i.- Frequency/output channel
The following menu allows us to select the
frequency-channel mode for the output
frequency. There are 7 tables for the
available channels. The selection is carried
out using the
and buttons.
Frequency mode
Channel mode.
Table 4 has been selected
As we change from frequency mode to
channel mode, the lowest channel is chosen
from the selected table. As we change from
channel mode to the frequency mode, the
channel frequency that was selected
appears on the display.
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User manual QPSK-PAL
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