Datum Systems PSM-500L Manual do Utilizador descarregar pdf (Página 2)

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-500S/N/L Series

Feature M505 M511 M523

Modulation

BPSK

a" a" a"

QPSK

a" a" a"

OQPSK

a" a" a"

8PSK/8QAM*

Upgrade !

a" a"

16QAM/APSK*

Upgrade ! Upgrade !

Max Data Rate

BPSK 2.5 Mbps 5 Mbps 7.38 Mbps

QPSK/OQPSK 5 Mbps 10 Mbps 28.04 Mbps

8PSK/8QAM* N/A 10 Mbps 29.52 Mbps

16QAM/APSK* N/A N/A 29.52 Mbps

The tables below show the data rate limits depending on specific hardware and user selected

operating modes. Rate ½ includes rate 0.453 and 21/44. Rate 0.9x includes 0.922 and 0.95.

The modem maximul symbol rate is 14.76 Mega Samples Per Second.

Table 3 – Maximum Data Rates vs. Modulation and Code Rates-Mbps

Modulation 5/16 1/2+ 3/5 2/3 3/4 4/5 5/6 7/8 0.9x

BPSK 4.61 7.38 8.86 11.07 11.81 12.3 12.92 14.02

QPSK/OQPSK 14.76 17.71 22.14 23.62 24.6 25.83 28.04

8PSK/8QAM* 29.52 29.52 29.52 29.52 29.52 29.52

16QAM/APSK* 29.52 29.52 29.52 29.52 29.52 29.52 29.52 29.52

Table 4 – Maximum Data Rates vs. FEC Type and Code Rates-Mbps

FEC Type 5/16 1/2+ 3/5 2/3 3/4 4/5 5/6 7/8 0.9x

Viterbi

29.52 29.52 29.52 29.52

TCM

29.52

TPC-4K

4.61 5 5 5 5 5 5

TPC-16k

4.61 29.52 29.52 29.52 29.52 29.52 29.52

S-Tec - Std

10 10 10 10 10 10 10

S-Tec – HS

20 20 20 20 20 20 20

Table 5 – Minimum Data Rates vs. Modulation and Code Rates-kbps.

Modulation

5/16 1/2+ 3/5 2/3 3/4 4/5 5/6 7/8 0.9x

BPSK

1.2 1.2 1.2 N/A 2.4 2.4 2.4

QPSK/OQPSK

2.4 2.4 7.20 8.0 8.0 8.4 8.4

8PSK/8QAM*

4.8 9.6 4.8 9.6 9.6 9.6 9.6

16QAM/APSK*

4.8 19.2 19.2 19.2 19.2 19.2

* 8QAM only operates in TPC FEC Modes. 16APSK operating mode not yet available.

*** Interface Maximum Data Rates ***

The built-in synchronous serial interface selectable for RS-449, V.35, IEA530 and variants is

limited to 10 Mbps by cables and available DTE devices. The RS-232 is limited to 128 kbps.

The optional SnIP and HSSI interfaces will operate up to 29.52 Mbps if other selections permit.

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