3.4.7 Determining Optimal Data Rate Versus Error Correction
Reed-Solomon (R-S) error correction is always enabled. However, the DXL8000 includes
option settings for powerful Viterbi error correction. However, the available throughput is
proportionally reduced. Use the following table to determine the optimal trade-off for your
application.
Channel Width (MHz)
10
20
30
40
Symbol Rate (Msps)
8.20
16.39
24.59
32.79
Modulation
Maximum Payload
QPSK (R-S only)
15.0103
30.0024
45.0127
60.0231
QPSK+1/2 Viterbi
7.5109
15.0127
22.5236
30.0345
QPSK+7/8 Viterbi
13.1340
26.2521
39.3861
52.5202
16QAM (R-S only)
29.9748
59.9131
89.8879
119.8628
16QAM+1/2 Viterbi
15.0103
30.0024
45.0127
60.0231
16QAM+3/4 Viterbi
22.4983
44.9692
67.4675
89.9658
32QAM (R-S only)
37.4685
74.8914
112.3599
149.8285
64QAM (R-S only)
N/A
N/A
134.8319
179.7942
64QAM+2/3 Viterbi
N/A
N/A
89.8879
119.8628
64QAM+7/8 Viterbi
N/A
N/A
117.7980
157.0800
3.5 Creating User Accounts
(
Administration Tab
)
The User Accounts screen on the Administration tab lets you define user accounts for the
DXL8000 as described in the following table:
Administrator User Name
Enter the user name of the DXL8000 administrator.
Administrator Password
Enter the administrator’s password.
User 1, 2, 3, and 4 User Name
Enter a user name for up to four other users of the DXL8000.
User 1, 2, 3, and 4 Password
Enter a password for each user you define.
DXL8000 User and Technical Manual
Operating the DXL8000 3-11
Summary of Contents for DXL8000
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