Comtech EF Data SNM-1001L - Manual (Page 332)

SNM-1001L Satellite Modem Revision 1
Burst Mode Modulator Operation MN/SNM1001L.OM
C–18
Additional Modulator Specifications
Output Power -5 to -30 dBm, adjustable in 0.1 dB steps
Output Spurious and Harmonics -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)
Output Impedance 75 Ω standard (50Ω optional)
Output Return Loss 20 dB
Output Frequency Stability ± 10 PPM
Data Clock Source Internal or external
External clock
± 100 PPM and < 5% jitter
Internal Data Clock Stability ± 10 PPM
Additional Demodulator Specifications
Input Power (Desired Carrier) -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
Input Impedance 75 Ω standard (50Ω optional)
Input Return Loss 20 dB
Carrier Acquisition Range ± 4 kHz minimum
Clock Acquisition Range ± 100 PPM
Acquisition Time < 30 ms
Directed Sweep N/A
Remote Control Specifications
Serial Interface RS-485/449, baud rate 110 to 19,200 bit/s
Protocol not necessarily compatible with SDM-650 and
SDM-308
Signals Controlled/Monitored 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 Eb/N0
TX Clock Internal/External
RX Clock Normal/Invert
Receive Signal Level
Receive Carrier Detect
Power Supply Voltages
Fault Status
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
Local control of all remote functions included via push-button entry