Comtech EF Data SNM-1001L Installation And Operation Manual page 73

SNM-1001L Satellite Modem
Front Panel Operation
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 <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.
Notes:
1.
2.
When the TX rate has been programmed, the transmitter is automatically turned off to
prevent swamping of other channels. To turn the transmitter on, use the TX-IF Output
function.
Code Rate 3/4 not compatible with a combination of a CSC Closed Modulator Type and
Sequential Encoder.
Continuous Mode Data Ranges
Code Rate
Non-Turbo Requirements
BPSK 1/2
Offset QPSK 1/2
Offset QPSK 3/4
QPSK 7/8
8-PSK 2/3
BPSK 1/1
Offset QPSK 1/1
BPSK 21/44
BPSK 5/16
Offset QPSK 1/2
8-PSK 3/4
Burst Mode Data Ranges
Code Rate
QPSK 1/2
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
Data Rate Range
2.4 to 1250 kbps
4.8 to 2500 kbps
7.2 to 3750 kbps
8.4 to 4375 kbps
64.0 to 5000 kbps
4.8 to 2500 kbps
9.6 to 5000 kbps
Turbo Requirements
2.4 to 1193.181 kbps
2.4 to 781.25 kbps
4.8 to 2386.363 kbps
384 to 5000 kbps
Data Rate Range
19.2 and 57.6 kbps
4–9
Revision 1
MN/SNM1001L.IOM