Comtech EF Data SFC1800A - Manual (Page 18)

Theory of Operation SFC1800A Synthesized Frequency Upconverter
3-2 TM111 - Rev. 1.0
3.1 Converter Configuration
The SFC1800A Upconverter has three basic operating configurations. These are: Stand-Alone,
1:1 Switch, and 1:8 Switch.
The upconverter automatically detects the equipment to which it is connected, and adjusts its
operation accordingly. Some user menus, most notably the switch Menu, are only available if the
upconverter is connected as the backup unit in a Redundancy Switch System.
The Switch Systems may be referred to as either a Redundancy Switch, a
Protection Switch, or simply a Switch. In addition, in all switch
configurations, the Backup Unit acts as the master (it controls all switch
operations).
3.1.1 Stand-Alone Operation
If J5 on the Back Panel of the SFC1800A Upconverter (B.U. SWITCH INTERFACE) is not
connected to a Switch, the unit will automatically configure itself for Stand-Alone Operation. The
user can set up all configurable parameters using one of the four different Interfaces described in
Section 4.
3.1.2 1:1 Switch
In the case of a 1:1 Switch System, the upconverter detects to which connector on the switch it is
connected (INTERFACE BACKUP or INTERFACE PRIMARY).
The Primary is also sometimes referred to as the Prime.
If the upconverter is connected as the backup, then all the switch controls are available to the
user on that unit.
Figure 3-2 illustrates a typical interconnection of a SFC1800A Upconverter with an RCU101 1:1
Protection Switch.