Comtech EF Data DMD1050TS Installation And Operation Manual page 153

Receive | General | IF Page
Frequency (MHz)
Spectrum
Modulation
Spectral Mask
Sweep Range
(+/- KHz)
Sweep Delay (sec)
Reacquisition Range
(+/- Hz)
Adj Carrier Power
Fast Acquisition
Carrier Input Level
Limit
Eb/No Alarm Thrsh
Web Browser
950 – 2050 MHz
•
NORMAL
•
INVERTED
•
BPSK
•
QPSK
•
OQPSK
•
8PSK
•
16QAM
•
8QAM
•
16APSK
•
DVBSAT .20 (optional)
•
DVBSAT .25 (optional)
•
DVBSAT .35 (optional)
•
DVB 0.35
•
DVB 0.25
•
INTELSAT .35
•
MIL 188 165A
•
±0 to 255 kHz
•
0.0 – 900.0 sec
•
0.00 – 6500.0 sec
•
0 – 32000 Hz
•
0 – 65500 Hz
•
NORMAL
•
SUPRESSED
•
DISABLED
•
ENABLED
•
-30 to -90 dBm (should
•
this be 90 or -90?)
0.0 to 9.9 dB
•
7–31
DMD1050TS Satellite Modem Board
Use to enter the Modulator Frequency in 1 Hz increments.
Use to invert the direction of rotation for PSK modulation.
Normal meets the IESS Specification.
Use to select the demodulation type.
Use to set the spectral shape of Tx Data Filter.
Use to set the acquisition range for the demodulator.
Use to set the reacquisition delay time in 1/10
increments.
Use to set the reacquisition sweep in 1 Hz increments.
Use to set the adjacent carrier as Normal or Suppressed
(High Power). The unit will increase or decrease post
dissemination gain as necessary.
Disable or enable the Rx Fast Acquisition capability for low
symbol rates.
Use to set the minimum carrier receive level when a carrier
drops below this level. The modem will sweep and try to
acquire a new signal. This prevents extremely small carriers
from falsely locking the modem.
Adjust the low-level threshold limit for input power. You can
specify a minimum operational signal level at which the
system can operate. This allows you to have some control
in tuning a real signal, as opposed to an adjacent bleed
through, or some other rogue signal.
An Input power level below the threshold limit causes a
major Input Level alarm on the demodulator. However, this
could be problematic to a software algorithm for auto-assist
antenna acquisition. The problem could occur if the
algorithm uses signal lock as a parameter for antenna
signal acquisition that is not specifically qualified with the
Input Level indicator. This is most applicable to the
DMD1050 and DMD1050TS card based modems.
Use to select an Eb/No level that will trigger an alarm when
the received Eb/No is worse.
Revision 1
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MN-DMD1050TS