Comtech SLM-5650BD Satellite Demodulator

Overview
The SLM-5650BD Satellite Demodulator is a receive only version of our latest generation USARSTRAT WGS certified modem product
targeted for critical commercial backhaul and government/military applications. It is fully compliant with MIL-STD-188-165A/B and
supports FIPS 140-2 certified encryption. The SLM-5650BD leverages the heritage and feature set of our very successful SLM-5650B
modem. The SLM-5650BD supports backwards compatibility and inter-operability with existing SLM-5650A networks while providing
enhanced performance and new features including:

Embedded:
• Gigabit Ethernet Bridge interface
• LNB reference and voltage
• BUC reference
Increased/Improved:
• Field Programmable Gate Array (FPGA) resource increased by x5 (future proof)
• Maximum spreading factor (512)
• Maximum chip rate (64 Mcps)
• Maximum symbol rate with LDPC (40Msps)
Decreased:
• DSSS acquisition times (x8 faster)
• Power consumption (reduced ~ 25%)
• Chassis length (reduced 1.5 inches)

The SLM-5650BD is compliant with the strict requirements defined in MIL-STD-188-165A, modem types I, II, IV, V and VI for
applications on DSCS, WGS and commercial satellites. Data rates from 8 kbps to 155.52 Mbps and symbol rates from 32 ksps to 64
Msps are supported. The SLM-5650BD is designed to support cost-effective point-to-multipoint Internet protocol (IP) applications in
both Layer-2 bridged and Layer-3 routed networks. The SLM-5650BD can be equipped with either a single 10/100/1000Base-T
Ethernet interface (standard) or optionally be equipped with a 4-port 10/100/1000Base-T Ethernet Network Processor module that
supports switching, routing, and advanced Quality of Service protocols.
The SLM-5650BD can be integrated with the Vipersat Management System (VMS) to provide fully automated network and capacity management (future software upgrade). An AES-256 TRANSEC module, compliant with the FIPS 140-2 standard, is also available as an option. All traffic (including overhead and all VMS control traffic) is encrypted when using the TRANSEC module. Advanced forward error correction (FEC) capabilities are a Comtech EF Data standard feature. Viterbi, Trellis, Concatenated Reed-Solomon, Sequential, Turbo Product Codes, and three Low Density Parity Check codes (LDPC) families are all supported.
Direct sequence spread spectrum is available to support point-to-multipoint applications as an option in conjunction with LDPC-based FEC and BPSK. Spreading factors up to 512 are supported. Maximum supported chip rate is 64 Mcps. Spread spectrum results in operation with ultra-low power spectral densities. This enables use of small antenna apertures when adjacent satellite interference (ASI) is an important consideration.

The IF interface supports 52 to 88, 104 to 176, and 950 to 2000 MHz frequency ranges.

Features
• MIL-STD-188-165A compliant (Types I, II, IV, V, VI)
• Selectable 70/140 MHz and 950 – 2000 MHz IFs
• AES-256 TRANSEC, FIPS 140-2 certified
• Dynamic bandwidth allocation with Vipersat Management System (future software upgrade)
• Support for bridged point-to-multipoint network architecture
• BPSK, QPSK, OQPSK, 8PSK, 8-QAM, 16-QAM
• Viterbi, Reed Solomon, Trellis, Sequential, Turbo Product Code (TPC), EBEM, & Low Density Parity Check (LDPC) FEC