Table of Contents
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Introduction
Forward Error Correction
Data Scrambling
Diagnostic Features
Prime Power
Size
Weight
Output Power
Output Spurious and Harmonics
Output Impedance
Output Return Loss
Output Frequency Stability
Data Clock Source
Internal Data Clock Stability
Input Power (Desired Carrier)
Input Impedance
Input Return Loss
Carrier Acquisition Range
Clock Acquisition Range
Serial Interface
Baud Rate
Signals Controlled/Monitored
1-1–8
Additional Modulator Specifications
Optional
Additional Demodulator Specifications
(Maximum Total)
Remote Control Specifications
SDM-309B Satellite Modem
Convolutional Encoding with Soft Decision
K7 Viterbi Decoding
Selectable, Synchronous (Per IESS-309
Rev 3 Section 4.4.5) or None
RF Loopback
Digital Data Loopback
Fault Monitoring
Bit Error Rate Monitoring
Remote Control via Serial Port
90-132 VAC or 180 to 264 VAC, 47-63 Hz
75 W Max. Fused at 2 A
5.25" H by 19.0" W by 18.0" D (3RU)
30 pounds Maximum
-5 to -25 dBm, Adjustable
in 0.5 dB Steps
+5 to -20 dBm
-50 dBc in Band (50 to 90 Mhz
or 100 to 180 Mhz)
-40 dBc out of band
(spurious measured in 4 KHz BW)
75 !
20 dB
± 10 ppm
Internal or External
± 50 ppm
-30 to -55 dBm
+30 dB power within 20 Mhz
from desired carrier
+40 dB power outside of 20 Mhz
from desired carrier
0 dBm
75 !
20 dB
± 25 KHz minimum
± 100 ppm
RS-232 or RS-485/449
300 to 9600 BPS
Transmit Frequency
Receive Frequency
Transmit Power
Transmitter On/Off
Data Rate Select
RF Loopback
Data Loopback
Scrambler On/Off
Descrambler On/Off
Raw Error Rate
Corrected Bit Error Rate
Receive Eb/N0
TX Clock Internal/External
RX Clock Normal/Invert
Receive Signal Level
Receive Carrier Detect
Power Supply Voltages
Fault Status
Stored Fault Status
MN/U-SDM309B Rev. #
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