Comtech EF Data SDM-300L3, Инструкция по установке и эксплуатации

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SDM-300L3 Satellite Modem Revision 0
Specifications MN/SDM300L3.IOM
14–3
14.2 Specification Summary
Table 14-1. System Specification Summary
System Specifications
Operating Frequency Range 950-1750MHz, in100 Hz steps
Digital Interfaces (Standard) EIA-232, EIA-422, and V.35
Digital Interfaces (Optional) G.703
Digital Data Rate 2.4 kbps to 5.0 Mbps, in 1 bit/s step (refer to: Digital Data Rate paragraph)
Symbol Rate 4.8 k symbols/s to 2.5 M symbols/s
Modulation/Demodulation BPSK
QPSK
OQPSK
8-PSK
Baseband Filtering IESS, Comtech EF Data Closed, Comstream Closed, EFD Closed
Forward Error Correction (FEC) Viterbi, K=7, 1/2, 3/4, 7/8 rates
Sequential 1/2, 3/4, 7/8 rates
Reed-Solomon Concatenated per Intelsat
Reed-Solomon Concatenated per closed network
Trellis 2/3 rate (8-PSK)
Turbo 1/2, 3/4, 21/44, and 5/16 rates
Uncoded
Reed Solomon Interleaver Depth 8, closed network; Depth 4 or 8 per IESS-308, 309, and 310
Plesiochronous/Doppler Buffer 1 to 99 ms, in 1 ms steps up to 2.6 Mbps
32 to 262,144 bits in 16 bit steps
Data Scrambling IESS-308 (V.35 Intelsat), IESS-309/310, FDC, V.35 (EFD/CSC), Modified V.35, None
Differential Encoding/Decoding ON/OFF
External Reference Input
1, 5, 10, 20 MHz (75
Ω
0 to 20 dBm on 50
Ω
BNC Female)
Note: Only 10 MHz allowed when operating with BUC and LNB requiring 10 MHz
reference from modem.
Open Collector Fault Reporting For redundancy switch operation or user reporting. Separate modulator and demodulator
open collector up to 15 VDC maximum at 20 mA.
Fault = collector Off and OK = collector On.
Test Modes, Loopback Data Baseband: Near end and far end
Interface: Near end and far end (Reed-Solomon or Overhead only)
Test Modes
IF
Loopback
RF Loopback
Available only when TX and RX are both L-band:
Disconnects the IF input from the RX input connector and couples it to a sample of the
TX IF output. The IF output is not affected.
Sets the demodulator frequency to the same value as the modulator. For the modem to
lock, an external IF loop must be provided.
Prime Power 85 to 264 VAC, 47 to 63 Hz, 60 Watts maximum
Physical:
Size
Weight
Mounting
1 RU1.75H x 19W x 19.18D inches (4.44 x 48.26 x 48.72 cm)
14.5 lbs. Maximum (6.51 kg)
Standard 19-inch (48.62 cm) rack mounts front and rear accepts standard rack mount
slides (no slides with 150W BUC power supply option)
Environmental:
Temperature
Humidity
0 to +50°C (32 to 122°F)
95% non-condensing
Survivability Shock and Vibration MIL-STD-810D Method 514.4, Procedure 8, 1 hour/axis
Agency Approvals CE Mark