Comtech EF Data SNM-1000 - Manual (Page 28)

SNM-1000 Node Control Modem Revision 3
Introduction MN/SNM1000.IOM
1-8
1.4.2 Environmental and Physical
Table 1-2. Environmental and Physical
Parameter Specification
Prime Power 90 to 264 VAC, 47 to 63 Hz
Optional: 38 to 64 VDC
Power Dissipation 30 Watt
Size 1.75H x 19.0W x 14.0D inch (1 RU)
(4.4H x 48W x 36D cm)
Weight < 11 lbs (< 5 kg)
Temperature:
Operating
Storage
0 to 50
°C (32 to 122°F)
-55 to 70
°C (-67 to 158°F)
Humidity Up to 95%, non-condensing
Shipping Container Dimensions 22W x 20D x 12H inches
(56W x 51D x 31H cm)
Shipping Weight 15 lbs (7 kg)
1.4.3 DAC Specification
The DAC performs all of the DAMA control functions. The DAC provides a set of
interface for communicating with an operator, controlling external traffic modems, etc.
The DAC communicates with the NMS for call control and M&C.
1.4.4 Burst Mode Specification
Table 1-3. Burst Mode Operating Specifications
Modulator Specifications
Operating Frequency Range
50 to 180 MHz
Type of Modulation QPSK
Operating Channel Spacing Less than 0.5 dB degradation operating with 2 adjacent-like
channels, each 10 dB higher at 1.3 times the symbol rate, or a
minimum of 1.2 times the specified acquisition range
Phase Noise In accordance with IESS-308
Digital Data Rate:
QPSK, 1/2 Rate
19.2 kbit/s
Forward Error Correction Convolution encoding, soft-decision K=7 Viterbi decoding
Data Scrambling Selectable or none, 215-1, synchronous