Table of Contents
Advertisement
CDM-600L Satellite Modem
Summary of Specifications
LDPC CODEC BER
Rate 2/3 8-PSK
Rate 3/4 8-PSK
(With two adjacent
carriers, each 7 dB
higher than the
desired carrier)
LDPC CODEC BER
Rate 2/3 8-QAM
Rate 3/4 8-QAM
(With two adjacent
carriers, each 7 dB
higher than the
desired carrier)
LDPC CODEC BER
Rate 3/4 16-QAM
(With two adjacent
carriers, each 7 dB
higher than the
desired carrier)
Plesiochronous/
Doppler Buffer
Monitor Functions
-10.0
-20.0
-30.0
-40.0
-50.0
-60.0
-70.0
-80.0
-90.0
-100.0
Sig Level.xls
8-PSK Rate 2/3 LDPC
Guaranteed Eb/No:
(typical value in
For:
parentheses)
-5
BER=10
-9
BER=10
5.7 dB (5.2 dB)
8-QAM Rate 2/3 LDPC
Guaranteed Eb/No:
(typical value in
For:
parentheses)
-5
BER=10
4.6 dB (4.2 dB)
-9
BER=10
5.0 dB (4.6 dB)
16-QAM Rate 3/4
Guaranteed Eb/No:
For:
(typical value in
parentheses)
-5
BER=10
6.8 dB (6.2 dB)
-5
BER=10
7.1 dB (6.8 dB)
Selectable size of 64 to 262,144 bits, in 16-bit steps (with added limitations for G.704 frame
boundaries)
Size selection is displayed in bytes and milliseconds
Supports asymmetric operation - when buffer is clocked from Tx clock, Rx and Tx rates do
not need to be identical
Eb/No estimate, 2 to 16 dB (± 0.25 dB accuracy)
Corrected Bit Error Rate, 1E-3 to 1E-10
Frequency offset, ± 32 kHz range, 100 Hz resolution
Buffer fill state, in percent
Receive signal level (-20 to –60 dBm, accuracy is ± 2.5 dB)
Carrier Level (vs) Symbol Rate
0.0
Maximum
1
10
8-PSK Rate 3/4
Guaranteed Eb/No:
(typical value in
parentheses)
-
5.7 dB (5.3 dB)
6.0 dB (5.6 dB)
8-QAM Rate 3/4
Guaranteed Eb/No:
(typical value in
parentheses)
5.2 dB (4.7 dB)
5.7 dB (5.3 dB)
LDPC
Minimum
100
1,000
10,000
Symbol Rate (ksps)
15–8
MN/CDM600L.IOM
LDPC
LDPC
100,000
Revision 2
Advertisement
Table of Contents
