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.
