Description; Operation; Fault Philosophy; Electrical Description - Paradise Datacom P300-VSAT Installation & Operating Handbook

3

DESCRIPTION

3.1

OPERATION

The P300 modem is fully software controlled and with the exception of the optional G.703 interface option
there are no links or switches used to configure the unit. This enables all control and configuration to be
performed either locally from the front panel, or by remote M&C. Local control is by front panel keyboard,
and a large, easy to read, 80 character LCD display, with clear, intuitive menus for configuration and
control. All the set-up parameters are stored in non-volatile memory which will retain data for a minimum
of 3 years, with no power applied. The receive and transmit functions of the Modem are independent, so
that they may be operated at a different data rates, IF frequencies, or different services if required.
Like all Paradise Datacom products, the P300 includes a traffic log which stores the last 1000 events,
suitably time-stamped. It can automatically add several measured parameters to the log at operator set
intervals, including average & worst case Eb/No, average & worst case estimated user BER, average &
worst case estimated uncorrected BER, and the buffer fill state. The logged performance monitoring allows
investigation into customer reports of poor link performance, and can provide a useful correlation against
weather conditions, etc.
3.2

FAULT PHILOSOPHY

Faults are split into two categories:
a) UNIT FAULTS:
b) TRAFFIC FAULTS:
A full description of every detected fault, its category (unit or traffic), and the corresponding action taken
is provided in Appendix G - Fault Messages and Action Table. The response of the front panel LED
indicators and external fault relays respond is described in the following sections.
3.3

ELECTRICAL DESCRIPTION

The P300 modem comprises of a single main modem Printed Circuit Board (PCB) with three optional
additional boards:
Optional G.703 interface (two different boards for T1 or E1 operation).
Optional IDR ESC board which provides for all the IDR ESC requirements
Optional Monitor / AGC board which provides a user scalable AGC output and a constellation
monitor point.
P300H
Equipment failures (such as a synthesiser lock failure).
Data path failures, (such as a lack of input clock).
P300 Modem Installation and Operating Handbook Page 16