Comtech EF Data DMD-2050E - Manual (Page 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 th 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.