Comtech EF Data CDM-840, Инструкция по установке и эксплуатации, Страница: 30 / 110

CDM-840 Remote Router Revision 0
Introduction MN-CDM840
1–10
Specification
Outbound (Hub to Remote) Return (Remote to Hub)
Data Rate
1 – 168 Mbps 16 kbps – 15.35 Mbps (CCM)
Symbol Rate
1 – 62 Msps (QPSK, 8-PSK)
1 – 47 Msps (16-APSK, 32-APSK)
(FUTURE)
16 ksps – 4.1 Msps (ACM)
16 ksps – 4.5 Msps (CCM)
FEC
DVB-S2 VersaFEC
Modulation and Code Rates
•
QPSK 1/2, 1/3, 1/4, 2/3, 2/5, 3/4, 3/5, 4/5, 5/6,
8/9, 9/10
•
8-PSK 2/3, 3/4, 3/5, 5/6, 8/9, 9/10
•
16-APSK 2/3, 3/4, 4/5, 5/6, 8/9, 9/10
• 32-APSK 3/4, 4/5, 5/6, 8/9, 9/10
•
BPSK 0.488
•
QPSK 0.533, 0.631, 0.706, 0.803
• 8-QAM 0.642, 0.711, 0.780
•
16-QAM 0.731, 0.780, 0.829, 0.853
Rolloff
20%, 25% and 35% 20%, 25% and 35%
Encapsulation
Enhanced GSE Streamline Encapsulation (SLE)
1.4.1 BER (Bit Error Rate)
VersaFEC CODEC BER
BPSK
(With two adjacent carriers,
each 7 dB higher than the
desired carrier)
For:
BER=10-5
BER=10-8
Rate 0.488
Guaranteed Eb/No
(typical value in
parentheses):
2.4 dB (2.1 dB)
2.7 dB (2.4 dB)
VersaFEC CODEC BER
QPSK
(With two adjacent
carriers, each 7 dB higher
than the desired carrier)
For:
BER=10
-5
BER=10
-8
Rate 0.533 QPSK
Guaranteed Eb/No
(typical value in
parentheses):
2.3 dB (2.0 dB)
2.5 dB (2.2 dB)
Rate 0.631 QPSK
Guaranteed Eb/No
(typical value in
parentheses):
2.8 dB (2.5 dB)
3.0 dB (2.7 dB)
Rate 0.706 QPSK
Guaranteed Eb/No
(typical value in
parentheses):
3.3 dB (3.0 dB)
3.7 dB (3.4 dB)
Rate 0.803 QPSK
Guaranteed Eb/No
(typical value in
parentheses):
3.8 dB (3.5 dB)
4.1 dB (3.8 dB)
VersaFEC CODEC BER
8QAM
(With two adjacent
carriers, each 7 dB higher
than the desired carrier)
For:
BER=10
-5
BER=10
-8
Rate 0.642 8QAM
Guaranteed Eb/No
(typical value in
parentheses):
4.6 dB (4.3 dB)
4.9 dB (4.6 dB)
Rate 0.711 8QAM
Guaranteed Eb/No
(typical value in
parentheses):
5.2 dB (4.9 dB)
5.5 dB (5.2 dB)
Rate 0.780 8QAM
Guaranteed Eb/No
(typical value in
parentheses):
5.6 dB (5.3 dB)
6.0 dB (5.7 dB)
VersaFEC CODEC BER
16QAM
(With two adjacent
carriers, each 7 dB higher
than the desired carrier)
For:
BER=10 -5
BER=10
-8
Rate 0.731
16QAM
Guaranteed Eb/No
(typical value in
parentheses):
6.4 dB (6.1 dB)
6.6 dB (6.3 dB)
Rate 0.780 16QAM
Guaranteed Eb/No
(typical value in
parentheses):
7.0 dB (6.7 dB)
7.3 dB (7.0 dB)
Rate 0.829 16QAM
Guaranteed Eb/No
(typical value in
parentheses):
7.5 dB (7.2 dB)
7.8 dB (7.5 dB)
Rate 0.853 16QAM
Guaranteed Eb/No
(typical value in
parentheses):
8.0 dB (7.7 dB)
8.3 dB (8.0 dB)
Monitor Functions • Eb/No estimate: 3 to 12 dB with ± 0.5 dB accuracy
•
Corrected Bit Error Rate: 1E-3 to 1E-9
•
Frequency offset: ± 32 kHz range,100 Hz resolution
• Signal Strength Indicator: 0-60 dB range relative to maximum gain