Comtech EF Data SDM-300A - Manual (Page 170)

SDM-300A Satellite Modem Revision 6
Front Panel Operation MN/SDM300A.IOM
5–76
• A flashing cursor is displayed on the first character of the coding type on line 1.
• Press [ENTER].Press [↑] or [↓] to change the modulation type and code rate as
desired.
• Press [←] or [→] to move to the data rate, and [↑] or [↓] to increase or decrease the
digit at the flashing cursor.
• Press [ENTER] to execute the change.
Code Rate Data Rate Range
BPSK 1/2 2.4 to 1250 kbps
{O}QPSK 1/2 4.8 to 2500 kbps
{O}QPSK 3/4 7.2 to 3750 kbps
{O}QPSK 7/8 8.4 to 4375 kbps
8PSK 2/3 64 to 5000 kbps
BPSK 1/1 4.8 to 2500 kbps
{O}QPSK 1/1 9.6 to 5000 kbps
Turbo Only
BPSK 21/44
2.4 to 1193 kbps
BPSK 5/16 2.4 to 781.25 kbps
{O}QPSK 1/2 4.8 to 2500 kbps
{O}QPSK 3/4 7.2 to 3750 kbps
8PSK 3/4 384 to 5000 kbps
Notes:
1. Code Rate 3/4 not compatible with a combination of a CSC Closed Modulator Type and
Sequential Encoder.
2. Maximum Symbol Rate: 2500 kbps
3. Option: Maximum Data Rate for Low Var Rate: 512 kbps
FUNCTION SELECT: UTILITY: MODULATOR: MOD POWER OFFSET
MOD POWER OFFSET
+ 0.0 dB
Modulator Power Offset Range: -99.9 To +99.9 dB, in 0.1 Db steps
This value is the offset to the modulator output power readout in the Configuration menu. This
screen does not actually change the modulator power level, but displays an offset value in the
monitor.
Note: Anything except 0.0 dB will cause ADJ to be displayed for the TX power level.