User's Manual

D. Customer Service C-2
© 2012 Moseley, Inc. All Rights Reserved. 602-16620-01, Rev. A
Digital Modulation
Type
Bandwidth Efficiency
(bps/Hz) TCM
Baseband Efficiency
(bps/Hz)
QPSK 1.74
1/2 0.80
3/4 1.20
7/8 1.40
16QAM 3.48
3/4 2.39
7/8 2.79
32QAM 4.35
4/5 3.19
9/10 3.59
64QAM 5.22
5/6 3.99
11/12 4.39
128QAM 6.09
6/7 4.79
13/14 5.19
256QAM 6.96
7/8 5.59
15/16 5.99
As an example, for a 25MHz RF channel using 16QAM modulation with a TCM of 3/4, the
Baseband Digital Rate (kbps) = 25 MHz x 2.39 bps/Hz x 1000 kbps/Mbps = 59,750 kbps.