User's Manual Part 9

Glossary
User Manual Page 119
NOC–NEM Interface: Acronym for
Network Operations Center–Network
Element Manager Interface. The EMS
character interface, available as a
window within the Maintenance
Interface, or remotely using a terminal
or a computer with a terminal emulator
program.
Normal Mode: One of the four
operating modes of host/remote pair
unit. In this mode the host/remote pair
are transporting RF signals normally.
Operating Mode: Any of the four
basic operating modes of a host/remote
pair. For mode descriptions, see
Normal, Program Load, Standby, and
Test.
PCIx Bus: Data bus using PCIx
interface (used in BTS server in
Digivance SDR system).
POST STATUS Message: ASCII
character string displayed periodically
in the NOC–NEM Interface to provide
a status update for all host/remote pairs
currently known to EMS.
Power Amplifier: (PA) See Linear
Power Amplifier.
Primary Fiber: Optical fiber between
the host unit and remote unit carrying
the primary forward (host Port 1) or
primary reverse (host Port 2) RF
spectrum in digital form. This may also
be an optic free space link. See also,
Secondary Fiber.
Program Load Mode: One of the four
operating modes of the host unit. This
mode occurs automatically when a user
downloads a program to a host unit or
remote unit in a host/remote pair.
Radio Frequency: (RF) Radio-type
frequency modulation signal received
at the BTS and transmitted from the
remote unit to the cell phone.
Reverse Path: Signal path in the
direction from the cell phone to the
BTS.
Remote Unit: Digivance network
element that receives an optical signal
from its paired host unit, converts the
optical signal to RF, and transmits the
RF signal to cell phones in a local
coverage area.
Response Message: ASCII character
string sent in response to a user
command in the NOC–NEM Interface.
See also, NOC-NEM Interface.
RF Signal Level: Measured power of
the forward path and reverse path RF
signals as measured in the host/remote
pair and reported in EMS.
SDR (Software Defined Radio):
Software application programmed to
process RF signals. It performs the
same functions as a hardware Base
Transceiver Station (BST). Compared
to that, however, it has the advantage
that new modulation types can be added
using software upgrades (without
requiring expensive changeouts of
hardware).
Secondary Fiber: Optical fiber
between the host unit and remote unit
(in addition to primary fibers), present
in diversity gain Digivance models
only. When present, the secondary fiber
carries the secondary reverse path
signal from a secondary antenna.