Radyne DMD2050, Operation Manual

Page: 70 / 214

DMD2050 Universal Satellite Modem User Interfaces
TM110 – Rev. 1.3 4-13
IF (menu)
FREQUENCY (MHz) {50 – 90 MHz, 100 – 180 MHz, or 950 - 2050 MHz}
Allows the user to enter the Modulator IF Frequency in
1 Hz increments.
SPECTRUM {NORMAL INVERTED}
Allows the user to invert the direction of rotation for PSK
Modulation. Normal meets the IESS Specification.
MODULATION {QPSK, BPSK, OQPSK, 8PSK, 16QAM}
Allows the user to select the demodulation type.
SPECTRAL MASK {MIL-188-165A, INTELSAT 0.35, DVB 0.35, DVB 0.25}
Allows the user to set the spectral shape of Tx Data
Filter.
SWEEP RANGE (kHz) {±0 to 255 kHz}
Allows the user to set the acquisition range for the
demodulator
SWEEP DELAY (Sec) {0.0 – 900.0 sec}
Allows the user to set the reacquisition delay time in
1/10
th
second increments.
REACQ RANGE (Hz) {0 – 32000 Hz}
Allows the user to set the reacquisition sweep in 1 Hz
increments.
ADJ CARRIER PWR {Normal, Suppressed}
Allows the user to indicate adjacent carrier as Normal or
Suppressed (High Power). Unit will increase or decrease
post discrimination gain appropriately.
FAST ACQUISITION {DISABLE, ENABLED}
Allows the user to disable or enable the RX Fast
Acqusition for low symbol rates.
INPUT THRESHOLD (dBm) {-30 to –90}
Sets a minimum carrier receive level when a carrier
drops below this level. IThe modem will sweep and try to
acquire a new signal. This prevents extremely small
carriers from falsely locking the modem.
EB/NO ALARM {0.0 – 9.9 dB}
Allows user to select an EB/NO level that will trigger an
alarm when the received EB/NO is worse.
DATA (menu)
DATA RATE (bps) {Refer to Technical Specs for Data Rates}
Allows the user to set the Data Rate in bps steps via the
Front Panel Arrows or Keypad.
SYMB RATE (sps) Allows the user to view the Symbol Rate.