34
Chapter 6 - SAT Measuring Range
106 V3.2
6.4
LNB supply
The measuring receiver controls a connected LNB or multi-switch with the conventional 14/18 V –
22 kHz control (max. 4 SAT-IF layers) or with DiSEqC control.
The supply is short-circuit proof and provides a maximum current of 500 mA. The instrument
automatically switches off the LNB supply if there is a short-circuit or if the current is too high.
The LED "DC OUT" at the keypad of the instrument lights in red as soon as the LNB supply is
active.
14/18 V – 22 kHz control
6.4.1
You activate the 14/18 V – 22 kHz control (if DiSEqC is off) with
LNB
-
>
SAT-IF-Laye
r
-
>
14V
,
18V
,
14V/22kHz
,
18V/22kHz
.Thereby the desired SAT-IF layer is set.
If DiSEqC is active press the
LNB
key, the
LNB
menu is displayed. You must first switch off the
DiSEqC or UNICABLE control with
DiSEqC
->
OFF
. Then you can select one of the 4 SAT-IF
layers via menu item
SAT-IF-Layer
.
The current selection is then shown on the top line of the display.
Figure 6-7 SAT-IF-Layer
Changing the fixed voltages
6.4.2
Two fixed voltages (14 V and 18 V) are set ex-works for the LNB supply.
In some cases, it can be useful to change the voltages (for example, to define the horizontal or
vertical switching threshold of an LNB or multi-switch).
If the
SAT-IF-Layer
menu is opened as shown in Figure 6-7 SAT-IF-Layer, you can access the
input menu by pressing the → arrow key. Now you can enter the new LNB voltage using the
numeric keypad or with the arrow keys from 5 V to 20 V in 1 V increments. Press ENTER to store
this setting. The setting is non-volatile.
