Comtech EF Data SNM-1001L - Manual (Page 124)

SNM-1001L Satellite Modem Revision 1
Front Panel Operation MN/SNM1001L.IOM
4–60
Select one of four (A, B, C, or D) pre-defined transmitter code/data rate combinations or a
variable rate selection (V).
Continuous Mode Data Rate
Code Rate Data Rate Range
Non-Turbo Requirements
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
QPSK 7/8 8.4 to 4375 kbps
8PSK 2/3 64.0 to 5000 kbps
BPSK 1/1 4.8 to 2500 kbps
{O}QPSK 1/1 9.6 to 5000 kbps
Turbo Requirements
BPSK 21/44 2.4 to 1193.181 kbps
BPSK 5/16 2.4 to 781.25 kbps
{O}QPSK 1/2 4.8 to 2386.363 kbps
8PSK 3/4 384 to 5000 kbps
Burst Mode Data Rate
Code Rate Data Rate Range
QPSK 1/2 19.2 or 57.6 kbps
Notes:
1. Max Symbol Rate = 2500 ksps
2. Max Data Rate for Low Var. Rate: 512 kbps.
3. Offset QPSK Option only: Offset QPSK 1/2, 3/4, and 7/8
Upon 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 twice.
To change the rate using the variable rate selection, press 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 to execute the change.
Notes:
1. When the TX rate has been programmed, the transmitter is automatically turned off to
prevent swamping of other channels.
2. To turn the transmitter on, use the TX-IF Output function.
3. Code Rate 3/4 not compatible with a combination of a CSC Closed Modulator Type
and Sequential Encoder.