Comtech EF Data STS11/STS11L - Manual (Page 21)

STS11/STS11L Solid-State Transfer Switch Revision 0
Operation MN-STS11-11
3-3
is non-revertive. That is, once a switch occurs, it requires a manual command
(either through the M&C or from the front panel) to return the prime unit on-line.
This will be the default operation, but the switching software is capable of
implementing revertive switching as well. Either modulator will be capable of
changing the state of the IF switch (assuming it is not faulted). This can be done
remotely or from the front panel. Remote control will occur through the standard
Ethernet M&C interface implementing SNMP. The switch connectors are listed
in Tables 3-1 and 3-2.
Table 3-1. STS11 Connectors
Connector
ID
Nomenclature Description
J1 Prime Mod Control 9-Pin D-Sub Control Connector From Prime Modulator
J2 Backup Mod Control 9-Pin D-Sub Control Connector From Backup Modulator
J3 Switch Status
Output
9-Pin D-Sub Switch Status Form-C Relay Outputs
J4 Prime Mod Input 75 Ohm, BNC From Prime Modulator
J5 Backup Mod Input 75 Ohm, BNC From Backup Modulator
J6 On-Line Output 75 Ohm Output of On-Line Modulator to Uplink Chain.
J7 Off-Line Output 75 Ohm Output of Monitor Port of Off-Line Modulator
Table 3-2. STS11L Connectors
Connector
ID
Nomenclature Description
J1 Prime Mod Control 9-Pin D-Sub Control Connector From Prime Modulator
J2 Backup Mod Control 9-Pin D-Sub Control Connector From Backup Modulator
J3 Switch Status
Output
9-Pin D-Sub Switch Status Form-C Relay Outputs
J7 Prime Mod Input 50 Ohm, SMA From Prime Modulator
J5 Backup Mod Input 50 Ohm, SMA From Backup Modulator
J6 On-Line Output 50 Ohm, SMA Output of On-Line Modulator to Uplink Chain.
J4 Off-Line Output 50 Ohm, SMA Output of Monitor Port of Off-Line Modulator
Each modulator has a 9-Pin D-Sub Connector for the switch. A 1:1 cable is
connected from each modulator to the switch. The pinout for the control
connector is listed in Table 3-3.