User's Manual

3-4 Aviat Networks
Chapter 3. System Overview
• It incorporates a router function for local and remote network management
interconnection.
• Eclipse configuration and licensing data is held in flash-memory.
• Required power supply is -48 Vdc (-40.5 to -60 Vdc).
•FAN (Fan card) provides forced-air cooling. This is a mandatory card.
• NPC (Node Protection Card) provides 1+1 protection functions for the NCC power
supply and backplane management.
• PCC (Power Conversion Card) supports operation from a a +24 Vdc power supply.
Plug-in Cards Overview
RAC 60
RAC 60 supports DPP (Data Packet Plane) as well as backplane data connections, plus
ACM (Adaptive Coding and Modulation) options.
Four dynamically switched modulation rates are available; QPSK, 16 QAM, 64 QAM,
256 QAM. Modulation switching is errorless for priority traffic.
Coding options additionally provide selection of two modulation states, one for
maximum throughput, the other for maximum gain. These apply on each of the
modulation rates of QPSK to 256 QAM to provide an effective total of eight modulation
states.
• Maximum throughput delivers maximum data throughput - at the expense of some
system gain.
• Maximum gain delivers best system gain - at the expense of some throughput.
• Up to four of the eight modulation states offered with ACM can be selected for use.
A DPP port enables direct routing of Ethernet traffic to a DAC GE.
Individual ACM modulation rates can be set as fixed rates. These are complemented by
fixed rates for TDM (DS1, DS3, OC3) capacities.
Channel bandwidths range from 3.5 to 30 MHz.
Air-link capacities for Ethernet, or for Ethernet + DS1, extend to 189 Mbit/s.
Backplane-connected TDM options extend to 100xDS1, 3xDS3, 1xOC3.
Payload encryption is a licensed option.
RAC 60s must be used at both ends of a link, or RAC 60 with a RAC 6X in non-CCDP
mode.
Figure 3-3. RAC 60