Comtech EF Data CDM-570L - Page 65

Filename: T_ERRATA 1
Errata E
Comtech EF Data Documentation Update
Subject:
Changed Figure 7-5, TPC Curve for Rate 7/8
Date:
July 27, 2006
Document:
CDM-570/570L Satellite Modem with Optional IP Module,
Installation and Operation Manual, Rev. 4, dated April 12, 2006
Part Number:
MN/CDM-570L.EE4
Collating Instructions:
Attach this page to page 7-14
Comments:
Chnaged slope of curves for TPC 7/8 for Figure 7-5. The following table highlights the changes
to the BER curve.
Change Specifics:
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
-5
BER=10
-8
Rate 7/8 (Q, OQ)
Guaranteed Eb/No:
(typical value in
parentheses)
4.3 dB (4.0 dB)
4.5 dB (4.2 dB)
Rate 7/8 (8-PSK)
Guaranteed Eb/No:
(typical value in
parentheses)
7.0 dB (6.6 dB)
7.2 dB (6.8 dB)
Rate 7/8 (16-QAM)
Guaranteed Eb/No:
(typical value in
parentheses)
8.1 dB (7.7 dB)
8.3 dB (7.9 dB)