Specification Summary; Table A-1. System Specification Summary - Comtech EF Data SNM-1001L Installation And Operation Manual

SNM-1001L Satellite Modem
Specifications
A.2

Specification Summary

System Specifications
Operating Frequency Range
Digital Interfaces (Standard)
Digital Data Rate
Symbol Rate
Modulation/Demodulation
Baseband Filtering
Forward Error Correction (FEC)
Reed Solomon Interleaver
Plesiochronous/Doppler Buffer
Data Scrambling
Differential Encoding/Decoding
External Reference Input
Open Collector Fault Reporting
Test Modes, Loopback Data
Test Modes
IF Loopback
RF Loopback
Prime Power
Physical:
Size
Weight
Mounting
Environmental:
Temperature
Humidity
Operational Shock
Survivability Shock and Vibration
Agency Approvals

Table A-1. System Specification Summary

950-1750MHz, in100 Hz steps
EIA-232, EIA-422, and V.35
2.4 kbps to 5.0 Mbps, in 1 bit/s step (refer to: Digital Data Rate paragraph)
4.8 k symbols/s to 2.5 M symbols/s
BPSK
QPSK
Offset QPSK
8-PSK
IESS, Comtech EF Data Closed, Comstream Closed, EFD Closed
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
Depth 8, closed network; Depth 4 or 8 per IESS-308, 309, and 310
1 to 99 ms, in 1 ms steps up to 2.6 Mbps
32 to 262,144 bits in 16 bit steps
IESS-308 (V.35 Intelsat), IESS-309/310, FDC, V.35 (EFD/CSC), Modified V.35, None
ON/OFF
1, 5, 10, 20 MHz (75Ω 0 to 20 dBm on 50Ω BNC Female)
Note: Only 10 MHz allowed when operating with BUC and LNB requiring 10 MHz
reference from modem.
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.
Baseband: Near end and far end
Interface: Near end and far end (Reed-Solomon or Overhead only)
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.
85 to 264 VAC, 47 to 63 Hz, 60 Watts maximum
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)
0 to +50°C (32 to 122°F)
95% non-condensing
MIL-STD-167-1. When any one corner of the modem is dropped from 1 cm onto a hard
surface, the modem will not take any errors or faults.
MIL-STD-810D Method 514.4, Procedure 8, 1 hour/axis
CE Mark
A–2
Revision 1
MN/SNM1001L.IOM