Operation
SDM-300A Satellite Modem
3–72
Rev. 4
C USTO M ER
D ATA
IBS o r IDR
IN TERFAC E
EN C O DER /
M O DU LATOR
T X = 7 0 M H z
TR AN SM IT R F
EQU IPM E NT
AN T E NN A
A C P O W E R
PO W E R
M IC R O-
CO M P UT ER
R E M O T E S E R IA L
IN T E R FA C E
FA U LT IN D IC ATO R S
SUP P LY
RE C EIVE RF
E QUIPM E NT
DE M O DU LATO R /
D EC O DER
S AT E LLITE M O D E M
L O O P B A C K C H A N G E S D E M O D
R E C E IV E FR E Q U E N C Y TO
7 0 M H z W IT H O U T LO S IN G
O R IG IN A L P R O G R A M M IN G
IN FO R M ATIO N .
R F L B K = 7 0 M H z
R X = 7 3 M H z
DATA
Figure 3-23. RF Loopback
Note: When RF loopback is turned on, the demodulator receive frequency is programmed to be the same frequency as the modulator transmit
frequency. This test mode will verify the satellite link without changing the programmed frequency of the demodulator. When RF loopback is
turned off, the demodulator is programmed back to the previous frequency.
CUSTO M ER
DATA
IBS, IDR or 308-2
INTER FACE
E NCO D ER/
M O DULATOR
TRANSM IT RF
EQUIPMENT
A NTENNA
A C P O W E R
PO W ER SUP PLY
MICR O -
C O M PUT ER
R E M O T E S E R IA L
IN T E R FA C E
FA U LT IN D IC ATO R S
R ECEIVE R F
EQ UIPM ENT
DEM O D ULATO R/
DECO DE R
S ATE LL IT E M O D E M
Figure 3-24. IF Loopback
Note: When IF loopback is turned on, the demodulator is looped back to the modulator inside the modem and the demodulator is programmed to
the same frequency as the modulator. This test mode will verify the operation of the modem. When IF loopback is turned off, the demodulator is
programmed back to the previous frequency and is reconnected to the IF input.
Содержание SDM-300A
Страница 1: ...Part Number MN SDM300A IOM Revision 4 SDM 300A Satellite Modem Installation and Operation Manual...
Страница 33: ...Introduction SDM 300A Satellite Modem 1 14 Rev 4 This page is intentionally left blank...
Страница 36: ...SDM 300A Satellite Modem Installation Rev 4 2 3 Figure 2 1 Installation of the Mounting Bracket...
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Страница 169: ...Theory of Operation SDM 300A Satellite Modem 4 18 Rev 4 This page is intentionally left blank...
Страница 176: ...SDM 300A Satellite Modem Maintenance Rev 4 5 7 WITH NOISE WITHOUT NOISE Figure 5 4 Typical Eye Constellations...
Страница 189: ...Maintenance SDM 300A Satellite Modem 5 20 Rev 4 This page is intentionally left blank...
Страница 200: ...SDM 300A Satellite Modem Options Rev 4 A 11 Figure A 2 D I with Asynchronous Overhead Data Flow...
Страница 205: ...Options SDM 300A Satellite Modem A 16 Rev 4 Figure A 3 E1 Framing Formats...
Страница 206: ...SDM 300A Satellite Modem Options Rev 4 A 17 Figure A 4 T1 Framing Formats...
Страница 237: ...Options SDM 300A Satellite Modem A 48 Rev 4 Figure A 10 IDR Interface Block Diagram...
Страница 241: ...Options SDM 300A Satellite Modem A 52 Rev 4 Figure A 11 IBS Interface Block Diagram...
Страница 257: ...Options SDM 300A Satellite Modem A 68 Rev 4 CBA Figure A 19 Reed Solomon Codec Installation...
Страница 260: ...SDM 300A Satellite Modem Options Rev 4 A 71 CBA Figure A 20 Overhead Interface PCB Installation...
Страница 265: ...Options SDM 300A Satellite Modem A 76 Rev 4 Figure A 24 8 Channel Multiplexer Installation...
Страница 273: ...Options SDM 300A Satellite Modem A 84 Rev 4 Figure A 26 Flex Mux Multiplexer Installation...
Страница 275: ...Options SDM 300A Satellite Modem A 86 Rev 4 This page is intentionally left blank...
Страница 330: ...SDM 300A Satellite Modem Remote Control Operation Rev 4 B 55...
Страница 362: ...Specifications SDM 300A Satellite Modem C 32 Rev 4 Figure C 7 8PSK BER Specification Curves 1544 kbit s...
Страница 366: ...Specifications SDM 300A Satellite Modem C 36 Rev 4 1 1 Rate Specification Figure C 9 Uncoded 1 1 BPSK QPSK and OQPSK...
Страница 388: ...Specifications SDM 300A Satellite Modem C 58 Rev 4 This page is intentionally left blank...
Страница 392: ...Glossary SDM 300A Satellite Modem g 4 Rev 4 This page is intentionally left blank...
Страница 398: ...Index SDM 300A Satellite Modem i 6 Rev 4 This page is intentionally left blank...