Comtech EF Data DMD-2050E Especificaciones descargar pdf (Pagina 118)

DMD2050E Universal Satellite Modem User Interfaces

MN-DMD2050E Revision 2 4–6

4.4.1.2 STRAP CODE

The STRAP CODE is another means for quickly setting several parameters at one time. STRAP

CODE parameters include:

• Data Rate • Inner Code Rate

• Satellite Framing • Scrambler

• Drop and Insert • Outer Code Rate (Reed-Solomon)

• Modulation • Network Spec

See Appendix I, Strap Codes for more data.

4.4.1.3 IF (menu)

IF MENU

FREQUENCY (MHz)

{50 – 90 MHz, 100 – 180 MHz, or 950

- 2050 MHz}

Enter the Modulator IF Output Frequency of the

modem in 1 Hz increments.

POWER (dBm)

{0 to -45 dBm} Enter the Transmitter Power Level.

CARRIER

{ON, OFF, AUTO, VSAT, RTS} Select the carrier type.

SPECTRUM

{NORMAL, INVERTED} Invert the direction of rotation for PSK Modulation.

Normal meets the IESS Specification.

MODULATION

{BPSK, QPSK, OQPSK, 8PSK,

8QAM, 16APSK, 16QAM}

Select the modulation type.

SPECTRAL MASK

{MIL-188-165A, INTELSAT 0.35, DVB

SAT 0.35, DVB SAT 0.25}

Set the spectral shape of Tx Data Filter.

COMPENSATION

{0 to 1 dB} Set the offset on the transmit output power (allows

for some specific cable loss up to 1dB).

4.4.1.4 DATA (menu)

DATA MENU

DATA RATE (bps)

See Chapter 7 Technical

Specifications

Set the Data Rate in bps steps via the Front Panel

Arrows or Keypad.

SYMB RATE (sps)

View the Symbol Rate.

Set the symbol rate (ITA Mode ONLY)

INNER FEC

Viterbi {1/2, 3/4, 7/8, None}

Optional FEC Rates:

Sequential {1/2, 3/4, 7/8}

CSC {3/4}

1 2 ... 113 114 115 116 117 118 119 120 121 122 123 ... 341 342

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