2408LT Standalone L-Band Fiber Optic Transmitter
Page -
8
Revision 1.5
4.2.
LNB POWER INDICATOR
SHORT:
The LNB PWR LED will be RED if the connected load is in a short circuit or overload
condition.
DC PASS:
The LNB PWR LED will be GREEN when the LNB power mode is set to DC PASS. In
this mode, DC input from the connected power supply is fed to the LNB. The voltage
seen by the LNB will be approximately equal to the voltage supplied by the connected
DC power supply minus 0.3VDC minus cable drop.
13V:
The LNB PWR LED will be ORANGE when the LNB power mode is set to 13 VDC. In
this mode, the LNB is supplied with regulated 13VDC.
When the LNB PWR LED is
blinking
, there will be a 22 kHz tone present in addition to LNB power.
If the LNB PWR LED is on or flashing, there will be DC voltage for LNB power
at the RF IN connector. This can damage some test equipment.
The user can turn off the LNB power by switching the LNB MODE switch to the
Off position.
4.3.
DC INPUT INDICATOR
HIGH >21V:
The DC IN LED will be RED if the supply voltage at the DC input is greater than 21
Volts.
OK 18V NOM.:
The DC IN LED will be GREEN when the supply voltage at the DC input is between 15
and 21 Volts (18 Volts nominal).
LOW <15V:
The DC IN LED will be ORANGE when the supply voltage at the DC input is less than
15 Volts.
