Snm-1000/1010/1010l control channel specifications – Comtech EF Data MIDAS 4 System and Design User Manual
Page 104
System and Design Manual, Revision 2
6–6 Traffic
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System Specifications
Operating Frequency Range
For SNM-1000/1010: 50 to 180 MHz, in 1 Hz steps
For SNM-1010L:
950 to 1750 MHz, 100 Hz steps
Digital Data
Continuous Mode:
Receive Data Rate
19.2 kbps
Symbol Rate
19.2 kHz
Demodulation QPSK
Forward Error Correction
Viterbi, K=7, 1/2
Data Scrambling
Intelsat V.35
External Reference
1, 5, 10, 20 MHz
Burst Mode:
Transmit Data Rate
19.2 kbps
Modulation
QPSK
Forward Error Correction
Viterbi soft-decision, R=1/2
Plesiochronous Buffer
2 to 98 ms, in 2 ms steps
Modulator
Data Clock Source
Internal or External
Output Spectrum
Meets IESS-308/309 EFD Closed
Output Power
For SNM-1000/1010: -5 to -30 dBm, adjustable in 0.1 dB steps
For SNM-1010L:
0 to –40 dBm, in 0.1 dB steps
Output Spurious
For SNM-1000/1010: < -55 dBc, 0 to 500 MHz (4 kHz band)
For SNM-1010L:
< -50 dBc(4 kHz band)
Output Return Loss
For SNM-1000/1010:
≥ 20 dB
For SNM-1010L:
≥ 14 dB
Output Impedance
For SNM-1000/1010: 75
Ω
For SNM-1010L:
50
Ω
Internal Stability
For SNM-1000/1010: ± 10 ppm
For SNM-1010L:
± 0.01 ppm
Outdoor Reference (Center conductor of
IF output connector)
For SNM-1010L:
On or Off, 10 MHz
± 0.01 ppm @ 0 dBm
± 0.5 dB
Output Unit Voltage (Center conductor of
IF output connector)
For SNM-1010L:
On or Off, 24 VDC @ 4.0 amps or
48 VDC @ 3.0 amps
Output Stability
For SNM-1010L:
± 0.5 dB
Output Phase Noise
For SNM-1010L:
< -63 dBc/Hz @ 100 Hz
< -73 dBc/Hz @ 1 kHz
< -83 dBc/Hz @ 10 kHz
< -93 dBc/Hz @ 100 kHz