Televes QPSK-PAL Manual De Instrucciones página 57

User manual
1: 72.5% 5: 82.5%
2: 75.0% 6: 85.0%
3: 77.5% 7: 87.5%
4: 80.0% 8: 90.0%
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
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.
Display
1
2
3
4
5
6
7
8
9
10
11
and but-
12
13
14
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:
AL (dBm)
7
5
3
1
0
-1
i.- Frequency/output channel
-2 (1.7Vpp aprox.)
The following menu allows us to select the
-3
frequency-channel mode for the output
-5
frequency. There are 7 tables for the
-7
available channels. The selection is carried
-9
out using the
-11
-13
-15
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
appears on the display.
57
QPSK-PAL
1: -11 dB 5: -15 dB
2: -12 dB 6: -16 dB
3: -13 dB 7: -17 dB
4: -14 dB 8: -18 dB
and buttons.
Frequency mode
Channel mode.
Table 4 has been selected
frequency that was selected