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SDM-300Ls Satellite Modem
Burst Mode Modulator Operation
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
Acquisition Time
Directed Sweep
Serial Interface
Signals Controlled/Monitored
Configuration Retention
Addressing
Local control of all remote functions included via push-button entry
Additional Modulator Specifications
-5 to -30 dBm, adjustable in 0.1 dB steps
-55 dBc in 4 kHz BW in-band (50 to 180 MHz)
-55 dBc in 4 kHz BW out-of-band (0 to 500 MHz)
75Ω standard (50Ω optional)
20 dB
± 10 PPM
Internal or external
External clock ± 100 PPM and < 5% jitter
± 10 PPM
Additional Demodulator Specifications
-30 to -55 dBm (composite)
+30 dB power within 2 MHz from desired carrier
+40 dB power outside of 2 MHz from desired carrier -5
dBm maximum composite
75Ω standard (50Ω optional)
20 dB
± 4 kHz minimum
± 100 PPM
< 30 ms
N/A
Remote Control Specifications
RS-485/449, baud rate 110 to 19,200 bit/s
Protocol not necessarily compatible with SDM-650 and
SDM-308
Transmit Frequency
Receive Frequency
Transmit Power
Transmitter ON/OFF
IF Loopback
RF Loopback
Baseband Loopback
Scrambler ON/OFF
Descrambler ON/OFF
Sweep Center
Filter Mask
Raw Error Rate
Corrected Bit Error Rate
Receive E b /N 0
TX Clock Internal/External
RX Clock Normal/Invert
Receive Signal Level
Receive Carrier Detect
Power Supply Voltages
Fault Status
Stored Fault Status
Will maintain current configuration for at least one year
without power
Programmable to 1 of 255 possibilities
Address 0 reserved for global addressing
B–8
Revision 1
MN/SDM300L3.IOM
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