Comtech EF Data DMD-2050E Especificaciones descargar pdf (Pagina 127)

DMD2050E Universal Satellite Modem User Interfaces

MN-DMD2050E Revision 2 4–15

Closed Net

All possible combinations are allowed.

NOTE: DVB settings require the DVB NETWORK SPEC and EBEM settings require the

EBEM NETWORK SPEC.

4.4.2.2 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.

4.4.2.3 IF (menu)

IF MENU

FREQUENCY (MHz)

{50 – 90 MHz, 100 – 180

MHz, or 950 - 2050

MHz}

Enter the Modulator IF Frequency in 1 Hz increments.

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 demodulation type.

SPECTRAL MASK

{MIL-188-165A,

INTELSAT 0.35, DVB

0.35, DVB 0.25}

Set the spectral shape of Tx Data Filter.

SWEEP RANGE (kHz)

{±0 to 255 kHz} Set the acquisition range for the demodulator

SWEEP DELAY (Sec)

{0.0 – 6500.0 sec} Set the reacquisition delay time in 1/10

second increments.

REACQ RANGE (Hz)

{0 – 65500 Hz} Set the reacquisition sweep in 1 Hz increments.

AGC TCONST (ms)

{0 – 99999ms} Set AGC Time Constant when in RFM mode

ADJ CARRIER PWR

{Normal, Suppressed} Set adjacent carrier as Normal or Suppressed (High Power).

Unit will increase or decrease post discrimination gain

appropriately.

FAST ACQUISITION

{DISABLE, ENABLED} Disable or enable the RX Fast Acquisition for low symbol rates.

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