Comtech EF Data SDM-300A - Manual (Page 175)

SDM-300A Satellite Modem Revision 6
Front Panel Operation MN/SDM300A.IOM
5–81
• 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 to the
desired value.
• Press [←] or [→] to to the data rate, and [↑] or [↓] to increase or decrease the digit at
the flashing cursor.
• Press [ENTER] to execute the change.
Notes:
1. Code Rate 3/4 not compatible with a combination of a CSC Closed Modulator Type and
Sequential Encoder.
2. Max symbol rate: 2500 bps
3. Max data rate for low variable rate option: 512 kbps
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