Introduction - Motorola OM 2000 Installation & Operation Manual

1 INTRODUCTION

The Motorola OM 2000 Out-of-band Modulator links the digital headend equipment
with the distribution system by combining the various out-of-band inputs into a
quadrature phase shift key (QPSK)-modulated signal. It converts multiple digital input
streams into an RF output signal for transmission over the cable system.
Figure 1-1 illustrates the OM 2000:
Figure 1-1 — OM 2000 Out-of-band Modulator
The OM 2000:
•
Receives Ethernet User Datagram Protocol (UDP) packets from a controlling
processor
•
Multiplexes downstream data from multiple sources
•
Provides forward error correction (FEC) encoding of the bitstream, as well as
interleaving and randomization
•
Provides downstream QPSK-modulated output within the 71 to 129 MHz range
•
Provides industry-standard Ethernet 10Base-T connectivity for operation,
administration, maintenance, and provisioning (OAM&P)
•
Performs periodic insertion of internally stored messages
•
Controls and provides status/alarm reporting using Simple Network Management
Protocol (SNMP)
1