Televes 5056, Руководство пользователя

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36
User manual COFDM-QAM
b.- Preamplifier powering
The second extended menu allows the user
to select the
powering of a possible pream-
plifier. One of the following options can be
selected using the and
buttons:
No powering
12V powering
24V powering
(1)
(1) The user must make sure that the COFDM-
QAM module and the power supply are con-
nected through the 4 pin cable (see section
6.-
Configuration example ).
c.- Selection of the input signal bandwidth
By pressing the button, it is possible to
gain access to the input filter selection .
This menu is only displayed if the mode
selection is by
frequency (see paragraph f.-
Selection of channel/frequency mode ). The
user can select 7 or 8 MHz. The following
will appear on the display:
Input filter: 7 MHZ
Input filter: 8 MHZ
5.2.- Extended menus
a.- Device address
The first option that appears in the extended
menus is the selection of the
device's
address . For a headend to be remote con-
trolled, each controllable element must have
a
unique address .
It is the installer's responsibility to ensure
that no addresses are repeated in the
control bus
.
The button lets us select the digit that we
want to modify, increasing or decreasing the
value using the or buttons.
The addresses available are from 1 … 254,
for example, the address number 36:
g.- Output level
By pressing the button, it is possible to
access the output level selection . In this
case, the cursor is not used for the selection
of the digit, and instead the and but-
tons are used to choose the output level
between 00 (minimum) and 99 (maximum).
For example, 86:
Once this point has been reached, the main
parameters of the COFDM-QAM module
have been configured. By pressing the
button for approximately 3 seconds, the
user can access a series of options that are
less frequently used which are called
Extended Menus.