Comtech EF Data CDM-600L Installation And Operation Manual page 58

CDM-600L Satellite Modem
Front Panel Operation
The Modulation Type and FEC rate choices are dictated by the Encoder type:
No Encoder:
Non-Turbo Encoder:
Turbo (Low Rate):
Turbo (High Rate Rate):
CONFIG: TX: DATA
TRANSMIT DATA RATE =00064.000 kbps
DATA INVERT = OFF (ON,OFF)
The top line permits the data rate to be edited. Select the digit of Transmit Data Rate to
be edited using the [←] [→] arrow keys.
The value of the digit is changed using the [↑] [↓] arrow keys. Press ENTER.
NOTE: The minimum and maximum data rates are dependent on Modulation type and
FEC encoder Rate. If the user changes the Modulation or FEC, and the data rate becomes
invalid, the Data Rate will be adjusted automatically.
The upper range of data rate will be dictated by the FAST option installed.
When Drop Framing or the G.703 interface type is used the [↑] [↓] arrow keys will scroll
through the available data rates. If in Drop Mode and the data rate is edited to 1920 kbps,
a comment is shown to indicate that E1 fixed channel mode will be implemented.
The bottom line permits the user to select the data inversion feature (added for
compatibility with certain older equipment). Select either ON or OFF, using the [↑] [↓]
arrow keys, then press ENTER.
BPSK Fixed at 1/1
QPSK, OQPSK Fixed at 1/1
BPSK Fixed at Rate 1/2
TCM 8-PSK Fixed at Rate 2/3
QPSK, OQPSK 1/2, 3/4 or 7/8
16-QAM 3/4 or 7/8
BPSK 5/16 or 21/44
QPSK, OQPSK Fixed at 3/4
8-PSK, or 16-QAM
BPSK 5/16 or 21/44
QPSK, OQPSK 1/2, 3/4, 7/8 and 0.95
8-PSK 3/4, 7/8 and 0.95
16-QAM 3/4 and 7/8
6–12
Revision 0
MN/CDM600L.IOM
(FAST option)
(FAST option)
(FAST option)
(FAST option)
(FAST option)