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DMD50 Universal Satellite Modem
MODULATION
SPECTRAL MASK
SWEEP RANGE (kHz)
SWEEP DELAY (Sec)
REACQ RANGE (Hz)
ADJ CARRIER PWR
FAST ACQUISITION
Limitations of Fast Acquistion:
•
•
•
•
INPUT THRESHOLD (dBm) {-30 to 90 dbm}
EB/NO ALARM
DATA (menu)
DATA RATE (bps)
SYMB RATE (sps)
INNER FEC
MN-DMD50 Revision 4
{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.
The maximum symbol rate for Fast Acquistion is 1028Ksps.
Fast Acquistion must be disable for rates greater than 1028Ksps.
Only supports QPSK and 8PSK in a NON-DVB MODE.
Does not support spectral inversion applications.
Allows the user to adjust the low level threshold limit for input
power. Input power level below the threshold limit will trigger a
major alarm on the demodulator.
{0.0 to 9.90 db}
Allows the user to set the desired E
This setting is compared against the receive E
commands to the remote modem to increase or decrease
Transmit Power accordingly are sent.
{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.
Allows the user to view the Symbol Rate.
Viterbi
Optional FEC Rates:
/N
for the local receiver.
b
o
/N
and
b
o
{1/2, 3/4, 7/8, None}
User Interfaces
th
4–13
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