Figure 10.-
LNB powering
If in the satelllite band, the band (high or low) and the polarity (vertical or horizontal) that
correspond to the selected powering and tone appear on the lower part of the windows
12V / 400mA ==>
low band, vertical polarity
17V / 300mA
==>
low band, horizontal polarity
24V / 75mA
==>
preamplifier powering
12V 22KHz / 400mA ==>
high band, vertical polarity
17V 22KHz /300mA
==>
high band, horizontal polarity
Auto
==>
this is only useful in the satellite band. It sets the
appropriate power and tone automatically, according
to the selected channel table, (using a universal LNB)
to select the band (high or low) and the polarity
(vertical or horizontal) to tune the selected channel.
The equipment continuously monitors the current in the F connector, and warns the user of any
error by means of a message window that appears on top of any other window that may be
open. The possible problems which may arise related to the powering of the external units are
as follows:
· The equipment detects a current in the coaxial cable. In this case, the message that appears
as a warning is "
Vext
". This situation should be avoided.
· When the equipment detects a shortcircuit, it emits an audio signal and the message that
appears as a warning in this case is “
Shortcircuit
".
· In the same way, the equipment warns the user when the consumption is greater than the
maximum amount permitted. The message that appears is "
Exceeded limit
". In the last two
cases, the power is cut-off and it automatically tries again approximately every 3 seconds.
Indicates if the 22KHz tone is
activated (in this case, it is not)
Options
.
These are selected by
using the rotating knob
and are activated when
this knob is pressed
Option to select and
limit the current
Indicates the power that is being used
Indicates the power that is being
supplied to the preamplifiers
Current status of the equipment
This indicates the band and the
polarity that are selected using the
marked option (in this case 12V 22
KHz/400 mA), and not the one that is
currently activated.
Multimetter FSM 500
Ref. 5903
24