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A-1

Preliminary Appendix A

Datum Systems PSM-500 Satellite Modem

Technical Specification

PSM-500, 500H and 500L VSAT / SCPC - Modem Specification

Revision History

Rev 0.8 7-10-2007 Preliminary Release.

Rev 0.85 1-10-2008 Preliminary Release added new performance statistics.

Rev 0.86 4-6-2008 Added new 8QAM performance statistics.

Introduction

This document defines the technical performance parameters and requirements for a low-cost

flexible, state-of-the-art VSAT/SCPC Satellite Modem. The PSM-500 Modem series is designed to

meet the needs of general purpose applications including those as a remote station VSAT modem

and as a Single Channel Per Carrier (SCPC) modem where both outgoing and incoming RF data is

continuous. Many of the capabilities of this modem series are largly determined by firmware in

FPGAs, and are expected to evolve in the future with added functions.

The PSM-500 series includes three basic types defined by their IF frequencies: The standard 70

MHz IF, a special order variation of the standard that uses a 140 MHz IF, and a full L-Band

version. A fourth “Hybrid” IF version with 70 MHz transmit IF and L-Band Receive IF may be

produced if demand is sufficient. The IF minimum and maximum settings are shown in Table 1

below. All versions are settable in 1 Hz increments via the front panel or remote control interfaces.

Table 1 - PSM-500 Series IF Interface Versions.

Interface

Versions PSM-500S PSM-500N PSM-500L PSM-500H**

IF Transmit 50 ~ 90 MHz 100 ~ 180 MHz 950 ~ 1750 MHz 50 ~ 90 MHz

IF Receive 50 ~ 90 MHz 100 ~ 180 MHz 950 ~ 1900 MHz 950 ~ 1900 MHz

** Note: The Hybrid version production is dependent on demand.

The IF interface is fixed in a particular modem by the design and manufacturing. It is not possible

to change the IF interface in a modem either by hardware or software changes.

Any of the PSM-500 IF versions is also available in one of 3 “Feature Sets” versions consisting of

Modulation modes and maximum data rates designed to meet the needs of specific applications.

The modulation modes and minimum and maximum data rates in each mode are shown below,

followed by specific limitations of specific FEC options.

Feature Sets are field software upgradable. Options are field hardware upgradable.

DATUM

SYSTEMS

1 2 3 4 5 6 ... 31 32

Indice de contenidos

Pagina 1 - SYSTEMS

A-1 Preliminary Appendix A Datum Systems PSM-500 Satellite Modem Technical Specification PSM-500, 500H and 500L VSAT / SCPC - Modem Specification Rev

Pagina 2

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-10 Viterbi FEC Performance for BPSK, QPSK and OQPSK with and wi

Pagina 3

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-11 16QAM Modulation Viterbi FEC Performance Waterfall

Pagina 4

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-12 8PSK Trellis Code Modulation Performance The Trellis Code Mo

Pagina 5 - Transmit Synthesizer

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-13 Turbo Product Codes Performance The typical perform

Pagina 6 - Transmit Baseband Processing

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-14 TPC M5 Compatible Modes Waterfall Curves Note: M5 Legacy mode

Pagina 7 - Receive Baseband Processing

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-15 TPC Advanced Performance Mode The TPC Advanced FEC

Pagina 8

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-16 TPC-Advanced 8PSK Performance TPC Advanced FEC Performance f

Pagina 9 - Bit Error Rate Performance

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-17 TPC-Advanced 8QAM Performance TPC Advanced FEC Perf

Pagina 10 - Viterbi BPSK/QPSK/OQPSK

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-18 TPC-Advanced 16QAM Performance TPC Advanced FEC Performance

Pagina 11 - Viterbi 16QAM

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-19 TPC-CT BPSK/QPSK Performance TPC CT FEC Performance

Pagina 12 - TCM 8PSK

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-2 Table 2 - PSM-500 Series Feature and Option Matrix. PSM-500

Pagina 13

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-20 TPC-CT 8PSK Performance TPC CT FEC Performance for 8PSK Requ

Pagina 14 - M5 Compatible TPC Modes

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-21 TPC-CT 8QAM Performance TPC CT FEC Performance for

Pagina 15 - TPC Advanced QPSK

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-22 TPC-CT 16QAM Performance TPC CT FEC Performance for 16QAMReq

Pagina 16 - TPC Advanced 8PSK

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-23 S-Tec Turbo Convolutional Codes Performance The ty

Pagina 17 - TPC Advanced 8QAM

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-24 S-Tec Large Block QPSK/BPSK Performance S-Tec FEC Performanc

Pagina 18 - TPC Advanced 16QAM

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-25 S-Tec Large Block 8PSK Performance S-Tec FEC Perfor

Pagina 19 - TPC-CT QPSK

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-26 S-Tec Large Block 16QAM Performance S-Tec FEC Performance fo

Pagina 20 - TPC-CT 8PSK

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-27 Acquisition Performance The following table shows t

Pagina 21 - TPC-CT 8QAM

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-28 Data Interface Specifications Data Input Type: ...

Pagina 22 - TPC-CT 16QAM

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-29 TPC FEC Full Encoder: Rate ½...

Pagina 23

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-3 Table 6 shows the currently available standard and op

Pagina 24

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-30 Link Calculation Example: A modem with R-S and IBS mux is ru

Pagina 25

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-31 Alarm, Monitor and Control Signals All monitor and

Pagina 26

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-32 interface. The interface is selectable as either RS-232 three

Pagina 27 - Acquisition Performance

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-4 PSM-500 Series FEC Option Table Rev. 1.6 Firmware 0.72+

Pagina 28 - Modulator Transmit Delays

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-5 The basic modem design includes separate synthesized

Pagina 29 - Demodulator Receive Delays

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-6 Frequency Stability: Standard & Hybrid... ± 2.0 pp

Pagina 30

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-7 Demodulator Specifications IF Input Input Frequency

Pagina 31 - Control

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-8 BER vs. Eb/No Performance: ... 0.2 dB t

Pagina 32 - Burst Mode Operation

Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification Rev. 0.86 A-9 Bit Error Rate Performance The following tables and t

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