Paradise RA 5785 User Manual download pdf (Page 58)

58 208143 REV - Operations Manual, HPA3, Mini Compact Outdoor SSPA

The system shown in Figure 7-3 uses the same concept of the power splitter on the RF input.

In this case the Compact Outdoor amplifiers are equipped with L-Band block up converters.

L-Band input amplifiers use phase locked oscillators as the local oscillator to the up converter.

Such systems must use a splitter at the input instead of a switch so that the reference input is

always available to the standby amplifier. If the reference signal is lost the standby amplifier

would report a BUC (Block Up Converter) fault.

Care must be taken when selecting the splitter for an L-Band input system. The splitter must

be a wide band design capable of passing the 10 MHz or 50 MHz reference signal along with

the 950 MHz to 1525 MHz traffic input. The reference frequency power level must be at least

-10 dBm into each Compact Outdoor Amplifier.

7.2 1:2 Redundant Systems

The Mini Compact Outdoor Amplifier can also be configured in 1:2 Redundant Systems. The

major difference being that the amplifier’s internal controller can not be used for system

control. Instead a separate RCP2-1200 Redundant System controller is used to provide

system control. The controller can be remotely located up to 500 ft. from the amplifiers.

Figure 7-4 shows a 1:2 Compact Outdoor Amplifier Redundant System.

Figure 7-3: 1:1 Redundant System with L Band input

Figure 7-4: 1:2 Redundant System Block Diagram

RF OUT-POL 2

SW2

SW1

RF OUT-POL 1

RF Input

POL 1

POL 2

1 2 ... 53 54 55 56 57 58 59 60 61 62 63 ... 81 82

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Paradise RA 5785 User Manual Page 58