Specifications - Comtech EF Data SDM-9000 Installation And Operation Manual

Theory of Operation

5.2.2 Specifications

Modulation Types
Data Rate Range
Symbol Rate Range
Frequency Range
Frequency Select Method
Frequency Step Size
Frequency Stability
Phase Error
Filtering Type
Spectral Occupancy
Spurious and Harmonics
Output Power
Output Power Stability
Output Power Adjustment
Output Impedance
Output Return Loss
Differential Encoding
FEC Encoding
I/O Connector
Reported Faults
5–6
•
QPSK
•
8PSK (optional)
•
16QAM (optional)
6.0 to 52.0 Mbit/s (Four data rate plug-on module)
1.7 to 37.6 Ms/s
50 to 180 MHz
Synthesized
2.5 kHz
Internal Reference:
± 10 PPM oscillator
0.2 PPM high stability option
External Reference (supported with High Stability
Option):
Will lock to external 5, 10, or 20 MHz reference
2.0° maximum
Nyquist, pre-equalized
Spectral density is -30 dB at ± 0.75 symbol rate
-55 dBc
-20 to +5 dBm, in 0.1 dB steps
± 0.5 dB
0.1 dB step size
Ω Ω
75 (50 optional)
> 18 dB
2-phase or none
•
Convolutional, K = 7
•
QPSK rates 1/2, 3/4, 7/8
•
8PSK rates 2/3, 5/6 (Trellis)
•
16QAM rates 3/4, 7/8
96-pin DIN
•
IF Synthesizer
•
Data Clock Activity
•
Data Clock Synthesizer
•
I Channel Activity
•
Q Channel Activity
•
AGC Level
•
External SCT Synthesizer
•
External Reference Activity
SDM-9000 Satellite Modem
Rev. 4