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Operation
TX-IF FREQUENCY
TX-IF OUTPUT
TX POWER LEVEL
SCRAMBLER
DIFFERENTIAL
ENCODER
3–10
Programs the modulator transmit frequency between 50 and 180 MHz, in
1 Hz steps.
Upon entry, the current transmitter frequency is displayed with the
flashing cursor on the first character. Press [←] or [→] to move the
flashing cursor, and [↑] or [↓] to increment or decrement the digit at the
flashing cursor. Press [ENTER] to execute the change.
Note: When the transmitter frequency is changed, the transmitter is
automatically turned OFF to prevent the possible swamping of other
channels. To turn the transmitter ON, use the TX-IF Output function.
Programs the modulator output ON or OFF.
Upon entry, the status of the output is displayed. Press [↑] or [↓] to make
the selection. Press [ENTER] to execute the change.
Programs the modulator output power level from:
•
Normal:
•
High Power:
An offset can be added through the Utility menu to remove losses or gains
in the system.
Upon entry, the current transmitter power level is displayed with the
flashing cursor on the first character. Press [↑] or [↓] to increase or
decrease the output power level in 0.1 dBm steps. Press [ENTER] to
execute the change.
Note: The front panel display may be changed in the power offset utility.
Using that function does not change the actual output power level.
The high power option is +5 to -20 dB. The window displays
AUPC_PWR when the AUPC is turned ON in the AUPC Configuration
menu.
Programs the scrambler ON or OFF.
Upon entry, the status of the scrambler is displayed. Press [↑] or [↓] to
make the selection. Press [ENTER] to execute the change.
Programs the differential encoder ON or OFF.
Upon entry, the status of the differential encoder is displayed. Press [↑] or
[↓] to make the selection. Press [ENTER] to execute the change.
SDM-300A Satellite Modem
-5 to -30 dBm
+5 to -20 dBm, high power
Rev. 4
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