SDM-9000 Satellite Modem
Theory of Operation
Rev.4
5–27
5.5.3.3.2 Interface Loopback
Interface loopback provides loopback at the interface between the interface module and
the modulator/demodulator. The near end equipment loops through the interface module
and the far end equipment loops through the modulator/demodulator. Refer to Figure 5-8
for a block diagram.
TX DATA/CLOCK
TERRESTRIAL
RX DATA/CLOCK
TX DATA
RX DATA
MODULATOR
DATA
DEMODULATOR
DATA
MODULATOR
MODULE
DEMODULATOR
MODULE
INTERFACE
MODULE
TX IF OUT
RX IF IN
INTERFACE
LOOPBACK
MUX
DATA/CLOCK
Figure 5-8. Interface Loopback Block Diagram
5.5.3.4 Engineering Service Channel (ESC)
The ESC includes the following features:
•
Two full duplex audio channels or one 64 kbit/s data channel
•
A full duplex 8 kbit/s data stream
•
Four backward alarms (described in IESS-308)
Содержание SDM-9000
Страница 1: ...Part Number MN SDM9000 IOM Revision 4 SDM 9000 Satellite Modem Installation and Operation Manual...
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Страница 5: ...8 Mbit s w IDR Figure 1 7 16QAM BER Performance Curves with Reed Solomon Filename T_ERRATA 3...
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Страница 27: ...SDM 9000 Satellite Modem Introduction Rev 4 1 5 Figure 1 3 SDM 9000 Block Diagram...
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Страница 64: ...Configuration SDM 9000 Satellite Modem 3 6 Rev 4 JP1 Figure 3 4 Interface PCB AS 3971...
Страница 65: ...SDM 9000 Satellite Modem Configuration Rev 4 3 7 Figure 3 5 Interface PCB AS 4477...
Страница 66: ...Configuration SDM 9000 Satellite Modem 3 8 Rev 4 JP1 JP6 JP7 Figure 3 6 Interface PCB AS 5618...
Страница 70: ...Configuration SDM 9000 Satellite Modem 3 12 Rev 4 Figure 3 7 Nyquist Filter Installation...
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Страница 124: ...SDM 9000 Satellite Modem Operation Rev 4 4 51 Figure 4 17 RF Loopback Figure 4 18 IF Loopback...
Страница 133: ...SDM 9000 Satellite Modem Theory of Operation Rev 4 5 5 Figure 5 3 Modulator RF Section Block Diagram...
Страница 150: ...Theory of Operation SDM 9000 Satellite Modem 5 22 Rev 4 Figure 5 6 Interface Block Diagram...
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Страница 167: ...SDM 9000 Satellite Modem Maintenance Rev 4 6 9 WITH NOISE WITHOUT NOISE Figure 6 4 Typical Eye Constellations...
Страница 186: ...Maintenance SDM 9000 Satellite Modem 6 28 Rev 4 This page is intentionally left blank...
Страница 218: ...Options SDM 9000 Satellite Modem A 32 Rev 4 This page is intentionally left blank...
Страница 242: ...Remote Control Operation SDM 9000 Satellite Modem B 24 Rev 4 ref SE_ command...
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Страница 256: ...2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 333 2200 PHONE 480 333 2161 FAX...