Non-Adaptive Modulation - Harris Stratex Eclipse 4.6 User Manual

Chapter 1. System Overview
RAC 30A
RAC 30A supports adaptive and non-adaptive modulation options.
For adaptive modulation it uses one of three automatically and dynamically switched
modulations - QPSK, 16 QAM or 64 QAM so that for a given RF channel bandwidth of
7, 14 or 28 MHz, a twofold improvement in data throughput is provided for a change
from QPSK to 16 QAM, and a threefold improvement to 64 QAM. Modulation switching
is hitless for priority traffic.
Adaptive modulation capacity options extend over:
• 10 to 130 Mbps Ethernet
• 5x to 63xE1
• 8x to 84xDS1
For non-adaptive modulation operation, its capacity options are the same as RAC 30v3.
RAC 30A interfaces to an ODU 300hp/ep/sp for ETSI channel bandwidths to 28 MHz,
or with ODU 300hp/ep for ANSI channel bandwidths to 30 MHz.
RAC 30A is compatible with RAC 30v3 or RAC 30v2 for non-adaptive operation.
Figure 1-14.
RAC 3X
RAC 3X interfaces to an ODU 300hp or ep for channel bandwidths from 28 to 56 MHz
(ETSI), or 30 to 50 MHz (ANSI), for capacity options of:
• 50 to 300 Mbps Ethernet
• 64/75/93/106xE1
• 32/70/84/100xDS1
• 4xDS3
• 1/2xSTM1/OC3
Figure 1-15.
RAC 40
RAC 40 interfaces to an ODU 300hp or ep to support co-channel XPIC operation for:
• Two 100, 130, or 150 Mbps Ethernet links on one 28 MHz or 30 MHz channel.
• Two STM1, 75xE1, 64xE1 or 52xE1 links on one 28 MHz channel.
• Two OC3, 100xDS1, 84xDS1 or 70xDS1 links on one 30 MHz channel.
Figure 1-16.
Vol. II-1-10
RAC 30A
RAC 3X
RAC 40
Harris Stratex Networks