Televes COFDM-PAL, User Manual

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43
User manual COFDM-PAL
ENGLISH
b.- Preamplifier powering
The second extended menu allows the user
to select the
powering of a possible
preamplifier . One of the following options
can be selected:
No powering
12V powering
24V
(1)
powering
(1) The user must make sure that the 4 pin cable is
connected to the CTRL connector.
c.- Selection of bandwidth
By pressing the button, it is possible to
gain access to the input filter selection. The
user can select 7 or 8 MHz. The following
will appear on the display:
7 MHz filter selected
8 MHz filter selected
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
controlled, as explained in section 7, 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
addreses available are from 1 ... 254, for
example, the address number 34:
For example:
This indicates 8K carriers, a constellation 64
QAM, guard interval 1/4 and a Viterbi rate
2/3. When the demodulator is not linked, the
following will appear “0.0.0.0.”
h.- Input level
By pressing the button, you access the
input level indication menu.
Level > -20 dBm
Level -60 < N < -20 dBm
Level < -60 dBm
Once this point has been reached, the main
parameters of the COFDM-PAL module
have been configured. By pressing the
button for approximately 3 seconds, you
can have access to a series of options that
are less frequently used and that are called
the Extended Menus.