Comtech EF Data DMD50 Installation And Operation Manual page 97

DMD50 Universal Satellite Modem
IF (menu)
FREQUENCY (MHz)
SPECTRUM
MODULATION
SPECTRAL MASK
SWEEP RANGE (kHz)
SWEEP DELAY (Sec)
REACQ RANGE (Hz)
ADJ CARRIER PWR
FAST ACQUISITION
MN-DMD50– Revision 3
The Strap Code is a quick set key that sets many modem
parameters. Consult the strap code guide for available strap
codes. Parameters set by strap code:
Data Rate
Inner Code Rate
Satellite Framing
Scrambler
Drop and Insert
Outer Code Rate (Reed-Solomon)
Modulation
Network Spec
{50 – 90 MHz, 100 – 180 MHz, or 950 - 2050 MHz}
Allows the user to enter the Modulator IF Frequency in 1 Hz
increments.
{NORMAL INVERTED}
Allows the user to invert the direction of rotation for PSK
Modulation. Normal meets the IESS Specification.
{QPSK, BPSK, OQPSK, 8PSK, 16QAM}
Allows the user to select the demodulation type.
{Intelsat 0.35, DVB 0.35, DVB 0.25, DVB 0.20}
Allows the user to set the spectral shape of Tx Data Filter.
{±0 to 255 kHz}
Allows the user to set the acquisition range for the demodulator
{0.0 – 6553.5 sec}
Allows the user to set the reacquisition delay time in 1/10
second increments.
{0 – 65535 Hz}
Allows the user to set the reacquisition sweep in 1 Hz
increments.
{Normal, Supressed}
Allows the user to indicate adjacent carrier as Normal or
Supressed (High Power). Unit will increase or decrease post
decimination gain appropriately.
{DISABLED, ENABLED}
Allows the user to disable or enable the Rx fast acquisition
capability.
User Interfaces
th
4–13