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SLM-7650 Satellite Modem
Operation
3.4.6.1
Utility Modulator Menu
Menu Item
ASSIGN TRANSMIT
FILTERS
MOD POWER OFFSET
MODULATOR TYPE
ENCODER TYPE
TX BPSK ORDERING
MOD SPECTRUM
TX IESS-310 MODE
TX R-S CODE WORD
TX SYMBOL RATE
Filter:
A, B, C, D, or V
Data rates are referenced in paragraph 3.3.
Note:
These assignments are used for the selection of the TX rate in the
Configuration Modulator menu.
Modulator power offset adjust. Offsets the modulator output power readout in the
Configuration menu. This feature does not actually change the modulator power
level, but displays an offset value in the monitor. The modulator power offset range
is -69.9 to +94.9 dB, in 0.1 dB steps.
Note:
Anything except 0.0 dB will cause ADJ to be displayed in the TX power
level screen.
Transmit filter type select. Select INTELSAT OPEN or EFD CLOSED network
filtering.
Note:
This window is only available when CUSTOM is selected for modem type in
the Utility menu.
FEC type select. Select VITERBI or TURBO.
Note:
This window is only available when CUSTOM or EFD is selected for
modem type in the Utility Menu.
Transmit BPSK bit ordering selection. Select STANDARD or NON-STANDARD.
Press an arrow key to make the selection. Press [ENTER] to execute the change.
Programmable vector rotation. Allows the operator to select Normal or Inverted
(INVERT) for spectrum reversal of the I and Q baseband channels.
Press an arrow key to make the selection. Press [ENTER] to execute the change.
Select IESS-310 mode on or off.
IESS-310 mode is for 8 PSK 2/3 modulation with Reed-Solomon only.
Press an arrow key to make the selection. Press [ENTER] to execute the change.
Displays or selects the current N, K, T, and Interleave values for the Reed-Solomon
FEC. The standard code word can only be changed when CUSTOM is the selected
modem type in the Utility Menu.
Status Only.
Displays the current TX Symbol Data Rate within 9.6 ksym/s to 10 Msym/s.
3-28
Specifications/usage
Revision 4
MN/SLM7650.IOM
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