UNAOHM
EP2500 (Rev. 0)
21
Figure 6
Display for transponder freq setting
7.7
ATTENUATOR
It is possible to insert from 0 to 80 dB attenuation in 10 dB steps, by means of the keys
ATT+ (17)
and
ATT-(18)
. The instrument takes the setting into account and indicates the effective value of the input
signal. The instrument also offers the possibility to range the attenuation automatically. This function is
enabled by means of the key
AUTO (15)
.
We recommend using the “autoranging mode” when operating on a set frequency (stored program or
specific channel) as otherwise, it would be more difficult to search for maximum reading. Conversely,
we recommend using the manual mode for dish peaking operations.
NOTE:
Setting the attenuator on autoranging may slow down the command response time.
7.8
LNB. REMOTE POWER SUPPLY TO LNB
The LNB may be powered in any SAT or terrestrial band as follows:
1.
Select the voltage to be applied by means of the key
13/18V (26)
.
2.
Press the key
LNB (25)
twice.
•
The LED
ON (10)
lights up.
•
The LED
CONT (11)
lights up when absorption of at least 50 mA is detected.connection.
•
The output current is automatically limited to 500 mA. In case of overload the power supply
is disconnected. To restore it, it is necessary to press
LNB
twice.
3.
To disconnect the power supply press
LNB
again.
NOTE:
when exiting from the SAT band the LNB is turned off for safety purposes
.
7.9
22 kHz COMMAND SIGNAL
It is alternately enabled and disabled by pressing the key
22k (27)
. The presence of the signal is
indicated in OSD fashion on the display. The same function may be carried out in the DiSEqC menu
(see the following chapter). The 22 kHz signal is available only when the LNB power supply is inserted.
ENTER
DOWN
UP
SAT PRMT
VIDEO POLARITY (K)
LO 0 =1°IF
LO 1A =(10000)
1B =(10500)
LO 2A =(09750)
2B =(10600)
EXIT
