Comtech EF Data SNM-1001L Installation And Operation Manual page 132

SNM-1001L Satellite Modem
Front Panel Operation
Select one of four (A, B, C, or D) pre-defined receiver code/data rate combinations or a variable
rate selection (V).
Upon entry, the current receive 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. When the RX rate has been programmed, the receiver is automatically turned off to
2. Code Rate 3/4 not compatible with a combination of a CSC Closed Modulator Type and
Continuous Mode Data Rate
Code Rate
Non-Turbo Requirements
BPSK 1/2
{O}QPSK 1/2
{O}QPSK 3/4
QPSK 7/8
8PSK 2/3
BPSK 1/1
{O}QPSK 1/1
BPSK 21/44
BPSK 5/16
{O}QPSK 1/2
8PSK 3/4
Burst Mode Data Rate
Code Rate
QPSK 1/2
prevent swamping of other channels. To turn the receiver on, use the RX-IF Output
function.
Sequential Encoder.
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 or 57.6 kbps
4–68
Revision 1
MN/SNM1001L.IOM