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SLM-3650 Satellite Modem
Theory of Operation
4.2.1
Modulator Specifications
Refer to Table 4-2 for modulator specifications.
Parameter
Modulation Types
Data Rate Range
Symbol Rate Range
Test Modes
Frequency Range
Frequency Select Method
Frequency Step Size
Frequency Stability (RF)
Frequency Stability (SCT)
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Table 4-2. Modulator Specifications
BPSK, QPSK, OQPSK, 8-PSK
2.4 kbps to 1.25 Mbps
4.8 kbps to 2.5 Mbps
7.2 kbps to 3.75 Mbps
8.4 kbps to 4.375 Mbps
64 kbps to 5.0 Mbps
4.8 kbps to 2.5Mbps
9.6 kbps to 5.0 Mbps
2.4 kbps to 1193.181 kbps
2.4 kbps to 781.25 kbps
4.8 kbps to 2386.363 kbps
64 kbps to 5.0 Mbps
4.8 ks/s to 2.5 Ms/s
Carrier Null and Quadrature (Dual and Offset)
50 to 180 MHz
Synthesized
1 Hz
Internal Reference: ± 10 PPM oscillator
Optional high stability oscillator (2 x 10
EXT REF. Connector
External Reference:
Will lock to external 1, 5, 10, or 20 MHz reference
Internal Reference:
± 10 PPM oscillator
Optional high stability oscillator (2 x 10
External Reference:
Will lock to external 1, 5, 10, or 20 MHz reference
4–9
Specification
1/2 Rate BPSK
1/2 Rate {O}QPSK
3/4 Rate {O}QPSK
7/8 Rate {O}QPSK
2/3 Rate 8PSK
1/1 Rate BPSK
1/1 Rate {O}QPSK
21/44 Rate BPSK
5/16 Rate BPSK
1/2 Rate {O}QPSK
3/4 Rate 8PSK
), with ability to drive out the
-7
)
-7
Revision 3
MN/SLM3650.IOM
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