Product specifications

UT4500 Series Up Converter MN/UT4500.IOM

Remote Control Revision 2

4.3 REDUNDANT CONFIGURATIONS

Comtech EF Data UT-4500 Series Up Converters can be configured in several different

redundant subsystem "Daisy Chain" configurations to meet the reliability requirements of

a communication system. These configurations include:

Table 13. 4500 Series Up Converter Configurations

1:1 Redundant Subsystems

Single Source IF Input Configuration

The online converter uses an IF and RF transfer switch to switch the IF input and

RF output signals. A single switched IF input and RF output is provided to and

from the online converter. The transfer switches are contained in the Transmit

Switch Module (TSM) installed in the online converter. When a fault occurs in the

online converter, the TSM is de-activated to switch out the online converter, and

switch the IF input and RF output to the backup converter. Figure 21 is an

illustration of the cable connections between the converters. Figure 22 is a block

diagram of this 1:1 redundant converter configuration.

Dual Source IF Input Configuration

Two IF inputs, IF input #1 (priority) and IF input #2, are switched in the Transmit

Switch Module (TSM) to provide redundant operation of the converters. The

converters provide two switched RF outputs, RF output #1 (priority) and RF output

#2. If converter #1 faults, converter #2 backs up the priority channel and IF signal

#2 and RF signal #2 are not operational. Figure 25 is an illustration of the cable

connections between the converters. Figure 26 is a block diagram of the 1:1

redundant, dual source IF input, converter configuration.

1:N Redundant Subsystems

IF and RF transfer switches in the TSM are used to switch the IF input and RF

output of a faulted online converter to the backup converter. The IF input and RF

output to the redundant converter subsystem is connected to online converter #N.

Figure 27 is an illustration of the cable connections between the converters.

Figure 28is a block diagram of this 1:N redundant "Daisy Chain" converter

configuration.