Comtech EF Data DMD1050TS, Инструкция по установке и эксплуатации

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DMD1050TS Satellite Modem Board
Revision 1
Web Browser 7–16 MN-DMD1050TS
Transmit / General / IF Page
Network Specs
•
CLOSED NET
•
IDR (optional)
•
IBS (optional)
•
DROP & INSERT
(optional)
•
DVB SAT
•
MILSTD 188 165A
•
EBEM (optional)
Supports IDR and IBS Framing Modes in Closed Net.
The Network Spec Command sets parameters in the modem
to meet a set specification. The purpose is to eliminate
keystrokes and compatibility problems. Additionally, data
rates not compatible with the selected network specification
are allowed.
The data rate must be compatible with the selected mode of
operation.
These parameters are set and cannot be changed while the
unit is in the selected mode of operation:
See Table 7-5. Network Specifications.
Strap Code
•
Data Rate
•
Inner Code Rate
•
Satellite Framing
•
Scrambler
•
Drop and Insert
•
Outer Code Rate
(Reed-Solomon)
•
Modulation
The Strap Code is a quick set key that sets many modem
parameters. See Appendix G.
Frequency (MHz)
•
950 – 2050 MHz Use to enter the Modulator IF Output Frequency of the
modem in 1 Hz increments.
Power (dBm)
•
0 to -25 dBm
•
0 to -45 dBm
(optional)
Use to enter the Transmitter Power Level.
Carrier Control
•
OFF
•
ON
•
AUTO
•
VSAT
•
RTS
Use to select the Carrier type. See Appendix B.
Spectrum
•
NORMAL
•
INVERTED
Use to invert the direction of rotation for PSK Modulation.
Normal meets IESS Specification. Spectral inversion can be
required if the BUC LO is higher in frequency than the BUC
output frequency. This creates a spectral inversion, and the
IF spectrum must be inverted again to compensate.
Modulation
•
BPSK
•
QPSK
•
OQPSK
•
8PSK
•
8QAM
•
16APSK (optional)
•
16QAM
Use to select the modulation type.
Spectra Mask
•
DVB SAT 0.20
•
DVB SAT 0.25
•
DVB SAT 0.35
•
INTELSAT 0.35
•
MIL 188 165A
Use to set the spectral shape of the Tx Data Filter.
Compensation (dBm)
•
0.0 to 1.0 dB Use to set the offset on the transmit output power (allows for
some specific cable loss up to 1 dB). Use as a correction for
user cabinet connectors.