Table of Contents
Advertisement
CDM-600L Satellite Modem
Front Panel Operation
•
•
•
* This coding option is only shown when a Turbo codec is installed.
** This coding option is only shown when a TPC/LDPC codec is installed.
Select ON or OFF for Reed-Solomon using the [↑] [↓] arrow keys, then press ENTER. If
Reed-Solomon is ON, proceed to the next menu.
If NONE is selected, the bottom line of the display will change from the Reed-Solomon
selection to the Differential Encoding selection, as shown below:
ENCODER= NONE(NONE,VIT,SEQ,TCM,TPC,LDPC)
DIFF-ENCODER= OFF (ON,OFF)
IMPORTANT
CONFIG: TX: ENCODER: REED-SOLOMON
REED-SOLOMON ENCODING = ON(200/180)
Use the [↑] [↓] arrow keys to select one of the listed parameters, and press ENTER.
Selections depend on the Framing mode. Possible selections include:
•
•
•
•
•
•
•
CONFIG: TX: MODULATION
MODULATION = QPSK (B,Q,OQ,8-PSK,16QAM)
FEC RATE = 1/2
TPC (Turbo) (Hardware option) *
None (uncoded)
LDPC (Hardware option). **
If the user selects Differential Encoding = OFF, there is no way for the
modem to resolve the phase ambiguities associated with PSK
modulations. For BPSK there is a 1 in 2 chance that the polarity of the
data will be correct. In QPSK there is a 1 in 4 chance that the data will
be correct.
IESS-310 (219/201), open or closed network
IBS (126/112), open or closed network
EDMAC (200/180), closed network
IDR (225/205), open network
IDR (194/178), open network
UNFRAMED (220/200), closed network
LEGACY COMTECH EF DATA (225,205, with V.35 scrambling), closed network
(1/2,3/4,7/8)
6–11
Revision 2
MN/CDM600L.IOM
Advertisement
Table of Contents
