Comtech EF Data SDM-9000 - Manual (Page 33)

SDM-9000 Satellite Modem Introduction
Rev. 4 1–11
Environmental
Temperature Range
Humidity 0 to 50
°
C
0 to 95%, noncondensing
Additional Modulator Specifications
Output Power -20 to +5 dBm, adjustable in 0.1 dB steps
Accuracy
± 0.5 dB
Output Spurious and Harmonics -55 dBc
Output Impedance 75 Ω (50 Ω optional)
Output Return Loss > 18 dB
Output Frequency Stability ± 10 PPM ( ± 0.2 PPM with high stability option)
Internal Data Clock Stability ± 10 PPM internal oscillator
± 0.2 PPM with high stability option
Additional Demodulator Specifications
Input Power (Desired Carrier) -45 to -25 dBm
Input Impedance 75 Ω (50 Ω optional)
Input Return Loss > 18 dB
Carrier Acquisition Range ± 60 kHz maximum
Clock Acquisition Range ± 100 PPM
Remote Control Specifications
Serial Interface RS-232-C or RS-485
Baud Rate 110 to 19200 bit/s
Functions Controlled •
Transmit/Receive frequency
•
Transmit power
•
Transmitter on/off
•
Data rate/modulation
•
RF/IF loopback
•
Baseband/Interface loopbacks
•
Scrambler/Descrambler types
•
Scrambler/Descrambler on/off
•
Buffer clock TX/RX/INT/EXT
•
Receive clock normal/invert
•
Differential encoding and decoding
•
Transmit and receive overhead type
•
IDR backward alarm control on/off
•
Reed-Solomon on/off
•
Mod and demod spectrum norm/invert
•
Sweep width range
•
Rev emulation current/functional
Signals Monitored •
Raw error rate
•
Corrected BER
•
Receive E
b
/N
0
•
Receive signal level
•
Receive carrier detect
•
Power supply voltages
•
Fault status
•
Current sweep value
•
Stored fault status
Configuration Retention Will maintain current configuration for at least one year
without power
Addressing Programmable to 1 of 255 possibilities; address 0 reserved
for global addressing
Note: Local control of all remote functions included by push-button entry.