Televes COFDM-PAL NICAM Manual De Instrucciones página 39

User manual
c.- Modulador menu 1
This menu shows the following parameters
of the output modulation: video modulation
depth (VMD) and video to audio carrier ratio.
The possible values for the video modulation
depht are:
1. 68.5% 5. 79.0%
2. 72.0% 6. 80.0%
3. 75.5% 7. 81%
4. 77.0% 8. 82.5%
For the carriers ratio there are only two pos-
sible values: -12 a -16 dB.
To carry out a modification the
be pressed until the selected parameter flas-
hes. Then the correspondent parameter can
be modified by pressing the and
d.- Modulator menu 2
This menu shows the following parameters:
audio level, video to second audio subca-
rrier ratio (RelSubp2) and video format.
Audio level: The value displayed indicates
the necessary audio input level to get a
deviation of ±50KHz considering an input
signal of 1KHz. This means that -17 dBm
will generate a greater audio level than 4
dBm.
key must
keys.
RelSubp2: allows the selection of the
NICAM carrier level related to the video
carrier in a range between -18 and -24.
The video format: allows the selection of
the video mode for programs in 16:9 format.
Three possible modes are available:
- Pan & Scan: Wide screen is scanned
- Letterbox: Picture with black bars on
- Full Screen: The picture adapts to the
39
COFDM-PAL NICAM
Audio input level (dBm)
7
5
3
1
0
-1
-2
-3
-4
-5
-7
-9
-13
-15
and panned left and right to give a fulll
screen picture
top and bottom of picture.