Comtech SLM-5650C2 68.7 Cubic Inches Software Defined Satellite Modem
The Comtech SLM-5650C2 is a compact software defined satellite modem designed for demanding satellite communication networks. It supports a wide range of modulation, coding, spreading, and networking options, allowing the modem to be configured for different satellite link requirements. Its compact design makes it suitable for installations where space, connectivity, and flexible modem configuration are important.
The modem operates across a 950 to 2000 MHz frequency range with 1 kHz tuning steps and supports BPSK, QPSK, OQPSK, 8PSK, 8QAM, 16QAM, and 16APSK modulation. It provides Gigabit Ethernet data rates from 8 kbps to 155.52 Mbps, with symbol rates from 32 ksps to 64 Msps. DSSS spread spectrum is also supported with integer spreading factors from 2 to 512.
The SLM-5650C2 provides flexible forward error correction options, including Viterbi, Reed-Solomon, Trellis, Sequential, Turbo Product Code, and optional LDPC. Available FAST options can add higher data rates, additional modulation modes, encryption, secure network management, AUPC, spread spectrum, STANAG 4486, and other advanced capabilities. This flexibility makes the modem suitable for different satellite network architectures and operational requirements.
Built-in test capabilities provide fault and status reporting, BER performance monitoring, IF loopback, programmable test modes, and Fireberd emulation. Management is available through EIA-232 and 10/100Base-T Ethernet with HTTP, Telnet, and SNMP. The Gigabit Ethernet interface can operate as a switch, bridge, or routed connection for integration with terrestrial network equipment.
The SLM-5650C2 is designed for satellite communications applications requiring configurable modulation, data rates, coding, spread spectrum, and network management capabilities. The indoor unit operates from 12 VDC and uses conduction cooling, while the outdoor unit supports 11 to 33 VDC or 100 to 240 VAC and carries an IP67 rating. Its environmental specifications support deployment across a broad range of operating temperatures in indoor and outdoor satellite communication installations.
Key features
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Software defined satellite modem with flexible configuration options
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950 to 2000 MHz operating frequency range with 1 kHz tuning steps
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Supports BPSK, QPSK, OQPSK, 8PSK, 8QAM, 16QAM, and 16APSK
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Gigabit Ethernet data rates from 8 kbps to 155.52 Mbps
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Symbol rates from 32 ksps to 64 Msps
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Supports DSSS spread spectrum with spreading factors from 2 to 512
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Multiple FEC options including Viterbi, Reed-Solomon, Trellis, TPC, and LDPC
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Ethernet, serial management, built-in test, and optional advanced features
SPECIFICATION
| GENERAL |
|
| Operating Frequency |
950 to 2000 MHz in 1 kHz steps |
| Modulation Types |
BPSK, QPSK, OQPSK, 8PSK, 8QAM, 16QAM, 16APSK |
| Spreading Factors |
Integer factors 2-512; BPSK LDPC only |
| Digital Data Rate |
Gigabit Ethernet: 8 kbps to 155.52 Mbps |
| Symbol Rate |
32 ksps to 64 Msps |
| Chip Rate |
32 kcps to 64 Mcps |
| Spread Spectrum |
DSSS with S.F. 2 to 512 integer steps |
| INT REF Stability |
± 0.06 ppm (± 6 x 10-8) |
| Scrambling |
V.35, OM-73 and synchronous |
| Built-in Test (BIT) |
Fault and status reporting, BER performance monitoring, IF loopback, programmable test modes, built in Fireberd emulation |
| Summary Fault |
Reported via LEDs, 9-pin D sub, FORM A relay (ODU only) |
| Unit Management |
EIA-232, 10/100Base-T Ethernet with HTTP, Telnet and SNMP |
| MODULATION OUTPUT |
|
| Output Power |
+10 to –40 dBm, adjustable in 0.1 dB steps |
| Output Return Loss |
13 dB minimum |
| Output Impedance |
50 Ω |
| Output Accuracy |
±1.0 dB over frequency and temperature |
| On/Off Power Ratio |
>60 dB |
| Data Clock Source |
Internal |
| Output Spectrum |
Selectable, Meets MIL-188-165A and Intelsat IESS-308, 309, 310 and 315 compliant |
| Spurious |
From Carrier ± TX SR TO 500 MHZ –51 dBc (measured in a 10kHz bandwidth) |
| Harmonics |
From carrier (CW) to 4000 MHz -60 dBC |
| Output Connectors |
Indoor unit, SMA female; ODU, Type “N” female |
| BUC |
Internal |
| Reference |
10 MHz, 0 dBm ± 3 dB |
| DEMODULATION |
|
| Input Carrier Power |
+10 to –55 dBm carrier (SR > 3.2 Msps); +10 to [-55 - 10log10(3.2/SR)], (SR ≤ 3.2 Msps) |
| Maximum Composite Power |
+20 dBm or +40 dBC |
| Input Impedance |
50 Ω |
| Input Connectors |
Indoor unit, SMA female; ODU, Type “N” female |
| Carrier Acquisition Range |
Programmable ± 30 kHz |
| Input Return Loss |
13 dB minimum |
| Doppler Buffer |
32 to 16,777,216 bits, selectable |
| LNB DC Current |
500 mA maximum |
| LNB Internal Reference |
10 MHz, 0 dBm ± 3 dB |
| TERRESTRIAL TRAFFIC INTERFACES |
|
| Gigabit Ethernet |
1 Port Ethernet switch/bridge/routed |
| CODING OPTIONS |
|
| Uncoded |
Standard 1/1 |
| Viterbi |
Standard K=7, 1/2, 3/4, and 7/8 rates |
| Viterbi & Reed-Solomon |
Standard Closed network, per IESS-308 and IESS-309 |
| Trellis |
Standard Per IESS-310 |
| Trellis and Reed-Solomon |
Standard Per IESS-310 |
| AVAILABLE OPTIONS |
|
| FAST Data Rates |
FAST data rates to 5, 10, 20, 52 or 155 Mbps |
| FAST SW Only |
AES-256 TRANSEC encryption |
| FAST Secure Network Management |
SSL/SSH/SNMPv3 |
| FAST ASYNC RS-485/232 |
Overhead channel / AUPC |
| FAST Spread Spectrum |
DSSS and/or DSSS-MA |
| FAST PPPoE Flow Control |
Requires STANAG 4486 |
| FAST DVB-S2/S2X |
Not available in WGS certified FW |
| ENVIRONMENTAL AND PHYSICAL – INDOOR UNIT |
|
| Prime Power |
12 VDC +/- 0.5VDC (40W max load) |
| Mounting |
Side or bottom attach |
| Dimensions (Height x Width x Depth) |
1.8” x 5.3” x 7.2” |
| Weight |
3.8 lbs. (1.7 kg) |
| Cooling Method |
Conduction |
| Temperature, Operating |
-10 to 70°C (Based upon mounting rail temperature) |
| Temperature, Storage (Non-operational) |
-40 to +85°C |
| Humidity |
0 to 95%, non-condensing |
