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The Solante Burst Demodulator (SBD) unit is used in the Solante Network Control Center (NCC) to receive the bursty inbound Return Order Wire (ROW) signals transmitted by the remote stations. See datasheet below.
Messages passed on through the ROW channels include:Log-in, Status Responses, Call-Request, and Clear-Confirm. It also receives the outbound FOW carrier as transmitted by its respective Solante Network Controller (SNC) unit. This is accomplished through the use of two distinct Receiver sections. The SBD sends messages to its respective SNC to indicate demodulator lock status as well as frequency offset. The SBD is normally powered via an IF & Power Distribution unit (IFD) at the NCC site. The SBD units can be configured and connected in redundant fashion. The Solante system allows M:N redundancy; that is, M-number of Backup SBD’s for N-number of Primary SBD’s. The SBD units are typically mounted in 19”-wide indoor cabinets with 8-SBD’s per chassis. Each chassis has an IF & Power Distribution unit mounted just underneath in order to provide power to the SBD’s and to divide the common L-Band receive signals for distribution to each SBD. A rack-mounted Ethernet switch is used to connect all SBD units to a system LAN and then onto the NMS and the SNC’s.
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