Comtech EF Data CDM-625 Installation And Operation Manual page 57

CDM-625 Advanced Satellite Modem
Introduction
LNB 10 MHz Reference
LNB Voltage
LNB Current Alarm
VITERBI BER performance
(met in the presence of two
adjacent carriers, each 7 dB
higher than the desired carrier)
VITERBI and RS 220,200 or
200,180 Outer Code BER (with
two adjacent carriers, each 7
dB higher than the desired
carrier)
8PSK/TCM CODEC
BER (with two adjacent
carriers, each 7 dB higher than
the desired carrier)
16-QAM VITERBI/
220,200 RS BER (with two
adjacent carriers, each 7 dB
higher than the desired carrier)
SEQUENTIAL at 64 kbps
BER performance (met in the
presence of two adjacent
carriers, each 7 dB higher than
the desired carrier)
SEQUENTIAL
at 2048 kbps BER
performance (met in the
presence of two adjacent
carriers, each 7 dB higher than
the desired carrier)
On center conductor of L-Band input connector, selectable ON/OFF. Level: -3dBm ± 3 dB.
Source: either Internal modem reference or External reference
Performance: For phase noise, refer to L-Band modulator 10 MHz. Frequency stability same as the modulator 10 MHz
reference.
On center conductor of L-Band input connector, selectable ON/OFF, 13, 18 volts per DiSEq 4.2 and 24VDC at 500 mA
maximum.
Programmable MIN and MAX current alarms.
Rate 1/2 (B, Q, OQ)
Guaranteed Eb/No:
(typical value in parentheses)
For:
BER=10 5.4 dB (4.9 dB)
-5
BER=10 6.0 dB (5.5 dB)
-6
BER=10 6.7 dB (6.2 dB)
-7
Rate 1/2 (B, Q, OQ)
Guaranteed Eb/No:
(typical value in parentheses)
For:
BER=10 4.3 dB (4.0 dB)
-5
BER=10 4.4 dB (4.1 dB)
-6
BER=10 4.5 dB (4.2 dB)
-7
Rate 2/3 8PSK/TCM
Guaranteed Eb/No:
(typical value in parentheses)
For:
BER=10 7.9 dB (7.2 dB)
-5
BER=10 9.5 dB (8.7 dB)
-7
BER=10 10.4 dB (9.5 dB)
-8
16-QAM Rate 3/4
Viterbi/RS
Guaranteed Eb/No:
(typical value in parentheses)
For:
BER=10 8.1 dB (7.5 dB)
-6
BER=10 8.6 dB (8.0 dB)
-8
Rate 1/2 (B, Q, OQ)
Guaranteed Eb/No:
(typical value in parentheses)
For:
BER=10 4.4 dB (4.0 dB)
-4
BER=10 5.1 dB (4.6 dB)
-6
BER=10 5.7 dB (5.2 dB)
-8
Rate 1/2 (Q, OQ)
Guaranteed Eb/No:
(typical value in parentheses)
For:
BER=10 5.0 dB (4.6 dB)
-4
BER=10 5.8 dB (5.4 dB)
-6
BER=10 6.7 dB (6.3 dB)
-8
Rate 3/4 (Q, OQ)
Guaranteed Eb/No:
(typical value in parentheses)
6.8 dB (6.3 dB)
7.4 dB (6.9 dB)
8.2 dB (7.7 dB)
Rate 3/4 (Q, OQ)
Guaranteed Eb/No:
(typical value in parentheses)
5.6 dB (4.7 dB)
5.8 dB (4.8 dB)
6.0 dB (5.2 dB)
Rate 2/3 8PSK/TCM
w/concatenated RS
Guaranteed Eb/No:
(typical value in parentheses)
6.3 dB (5.4 dB)
6.7 dB (5.8 dB)
6.9 dB (6.0 dB)
16-QAM Rate 7/8
Viterbi/RS
Guaranteed Eb/No:
(typical value in parentheses)
9.5 dB (9.0 dB)
10.1 dB (9.5 dB)
Rate 3/4 (Q, OQ)
Guaranteed Eb/No:
(typical value in parentheses)
5.2 dB (4.7 dB)
5.8 dB (5.4 dB)
6.4 dB (6.0 dB)
Rate 3/4 (Q, OQ)
Guaranteed Eb/No:
(typical value in parentheses)
5.6 dB (5.2 dB)
6.4 dB (6.0 dB)
7.3 dB (6.8 dB)
1–17
Revision 13
MN-CDM625
Rate 7/8 (Q, OQ)
Guaranteed Eb/No:
(typical value in parentheses)
7.7 dB (7.2 dB)
8.4 dB (7.9 dB)
9.0 dB (8.6 dB)
Rate 7/8 (Q, OQ)
Guaranteed Eb/No:
(typical value in parentheses)
6.5 dB (6.0 dB)
6.7 dB (6.2 dB)
6.9 dB (6.5 dB)
Attention:
For 126,112
Reed-Solomon
Add 0.2 dB to these figures
Rate 7/8 (Q, OQ)
Guaranteed Eb/No:
(typical value in parentheses)
6.2 dB (5.7 dB)
7.0 dB (6.6 dB)
7.9 dB (7.4 dB)
Rate 7/8 (Q, OQ)
Guaranteed Eb/No:
(typical value in parentheses)
6.5 dB (6.0 dB)
7.6 dB (7.2 dB)
8.7 dB (8.2 dB)