Menus; Configuration Menu; Modulator Menu - Comtech EF Data SLM-7650 Installation And Operation Manual

SLM-7650 Satellite Modem
Operation
3.4

Menus

3.4.1

Configuration Menu

3.4.1.1

Modulator Menu

Menu Item
TX-DR
Data Rate, Code Rate, and
Modulation Type
TX-IF FREQUENCY
TX-IF OUTPUT
TX POWER LEVEL
SCRAMBLER TYPE
Filter: A, B, C, D, or V
Data rates are referenced in Paragraph 3.3
On entry, the current transmitter rate is displayed with the flashing cursor on the
first character of the code rate on line 1. Line 2 displays the data rate. Press [←] or
[→] to make the selection. To select the currently defined variable data rate, select
TX-V, and press [ENTER] twice.
To change the rate using the variable rate selection, press [ENTER] when TX-V is
displayed. A flashing cursor is displayed on the first character of the coding type on
line 1. 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.
Programs the modulator transmit frequency between 50 and 90 or 100 to 180 MHz,
in 1.0 Hz steps.
On entry, the current transmitter frequency is displayed with the flashing cursor on
the first character. Press [←] or [→] to move the flashing cursor, and [
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 IF Output function.
Programs the modulator output On or Off.
On entry, the current status of the output is displayed. Press an arrow key to make
the selection. Press [ENTER] to execute the change.
Programs the modulator output power level from:
+5 to -30 dBm for no offset.
An offset can be added through the Utility menu to remove losses or gains in
the system.
On 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.
Programs the scrambler IESS, OM73, or TURBO.
On entry, the current status of the scrambler is displayed. Press an arrow key to
make the selection. Press [ENTER] to execute the change.
3-8
Specifications/usage
Revision 4
MN/SLM7650.IOM
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