Comtech EF Data Vipersat CDD-562L, Инструкция по установке и эксплуатации

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CDD-562L/564 Demodulator with IP Module Revision 2
Introduction MN/CDD564L.IOM
1–15
1.4.5 BER (Bit Error Rate)
IMPORTANT NOTE: Starting with Release 1.4.1 of the CDM-570/570L firmware, the maximum symbol rate has been increased
from 2.5 to 3.0 Symbol/sec. This has been done without modification to the hardware and as a consequence there may be a
small degradation in BER versus Eb/No performance for rates above 2.5 Msymbols/sec.
The degradation is as follows:
Rates from 2.5 to 2.65 Msps: degradation < 0.1 dB
Rates from 2.65 to 2.80 Msps: degradation < 0.2 dB
Rates from 2.80 to 3.00 Msps: degradation < 0.3 dB
TURBO PRODUCT CODEC
Rate 3/4 QPSK
Rate 3/4 8-PSK
Rate 3/4 16-QAM
(With two adjacent carriers,
each 7 dB higher than the
desired carrier)
For:
BER=10 -6
BER=10 -7
BER=10 -8
Rate 3/4 (Q)
Guaranteed Eb/No:
(typical value in
parentheses)
3.8dB (3.4dB)
4.1dB (3.7dB)
4.4dB (4.0dB)
Rate 3/4 (8-PSK)
Guaranteed Eb/No:
(typical value in
parentheses)
6.2dB (5.8dB)
6.4dB (6.0dB)
6.8dB (6.3dB)
Rate 3/4 (16-QAM)
Guaranteed Eb/No:
(typical value in
parentheses)
7.4dB (7.0dB)
7.8dB (7.3dB)
8.2dB (7.7dB)
TURBO PRODUCT CODEC
Rate 7/8 QPSK
Rate 7/8 8-PSK
Rate 7/8 16-QAM
BER
(With two adjacent carriers,
each 7 dB higher than the
desired carrier)
For:
BER=10
-6
BER=10
-7
BER=10
-8
Rate 7/8 (Q)
Guaranteed Eb/No:
(typical value in
parentheses)
4.3dB (4.0 dB)
4.4dB (4.1 dB)
4.5dB (4.2 dB)
Rate 7/8 (8-PSK)
Guaranteed Eb/No:
(typical value in
parentheses)
7.0dB (6.6dB)
7.1dB (6.7dB)
7.2dB (6.8dB)
Rate 7/8 (16-QAM)
Guaranteed Eb/No:
(typical value in
parentheses)
8.1dB (7.7dB)
8.2dB (7.8dB)
8.3dB (7.9dB)
TURBO PRODUCT CODEC
Rate 0.95 QPSK
Rate 0.95 (8-PSK)
(With two adjacent carriers,
each 7 dB higher than the
desired carrier)
For:
BER=10 -6
BER=10 -7
BER=10
-8
Rate 0.95 (Q)
Guaranteed Eb/No:
(typical value in
parentheses)
6.4dB (6.0dB)
6.7dB (6.3dB)
6.9dB (6.5dB)
Rate 0.95 (8-PSK)
Guaranteed Eb/No:
(typical value in
parentheses)
9.3dB (8.9dB)
9.8dB (9.4dB)
10.3dB (9.9dB)
Monitor Functions
Eb/No estimate: 2 to 16 dB ( ± 0.25 dB accuracy)
Corrected Bit Error Rate: 1E-3 to 1E-9
Frequency offset:
± 200 kHz range 100 Hz resolution)
Buffer fill state (in percent)
Receive signal level: -20 to -90 dBm (
±
5.0 dB accuracy)