Paradise 205486 REV F manual using the Reference Combiner Assembly, Step Action

Models: 205486 REV F

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using the Reference Combiner Assembly.

L Band Input- POL 1 10MHz Step Action

L Band Input- POL 2 10MHz Manual backgroundManual background

L-Band only

L-Band Test Input

Test Input to Standby to Standby

BUC

Amp 1

DBTC-16-5-75L+

 

-16dB

 

BUC

Amp 2

3 dB

 

PAT-3

 

ADP-2-1

 

BUC

Amp 3

-16dB

 

DBTC-16-5-75L+

 

Reference

 

Combiner Assembly

 

 

RCP2-1200

 

Redundant Controller

Alarm

 

Inputs

 

RF OUT-POL 1

RF OUT-POL 2

Switch Drive

Figure 7-27: Standard 1:2 Redundant System with External 10MHz Reference

using the Reference Combiner Assembly.

The Reference Combiner assembly, as shown in Figure 7-27, couples a sample of the 10 MHz reference from each of the two polarity inputs. It will then supply the standby amplifier with the reference from either of the two inputs. The reference combiner will arbitrate and decide which 10 MHz signal to supply to the standby amplifier. It will not supply both 10 MHz sources to the standby amplifier. This allows all three amplifiers to be in a normal operating (non faulted) condition and the RCP2-1200 controller can operate the system in normal 1:2 redundancy. This eliminates the need for a separate 10 MHz line going to the system as the 10 MHz reference normally exists on each L-Band cable.

Amp 2 is meant to be the standard stand-by amplifier in this configuration. Should Amp 1 or Amp 3 fault, the RCP2-1200 will automatically switch to the stand-by Amp 2. However, when this occurs, this interrupts the 10 MHz reference to the faulted Amp/BUC, which results in a constant BUC fault on that thread. In order to return Amp 2 to the stand-by state, the user will need to clear the fault, switch to manual mode on the RCP2-1200 and then select Amp 2 as stand-by. Table 7-1 gives a step-by-step guide to returning Amp 2 to stand-by status.

Table 7-1: Returning Amp 2 to Stand-by Mode After Fault on Thread 1 or 3

Step Action

1Fault on Thread 1 or Thread 3 causes switchover to Thread 2

2Determine cause of fault on Thread 1 or Thread 3 and remove fault condition

3Switch to Manual mode on RCP2-1200

4Select Amp 2 as stand-by amplifier

5Switch to Auto mode on RCP2-1200

Operations Manual, HPA2, Compact Outdoor SSPA

205486 REV F

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Page 65
Image 65
Paradise 205486 REV F manual using the Reference Combiner Assembly, Step Action