8.5.1 Output Power Adjustment

Each 1:2 Fixed Phase Combined SSPA System has been factory set for optimal Phase Combining before shipment and should not need adjustment during installation and operation. In the event that an amplifier is replaced, it may then be necessary to make additional phase adjustment.

The two phase adjusters are located inside the Signal Box and are labeled PA1 and PA2. To make adjustments, loosen the 7/16” locking nut at the bottom of the phase adjuster and connect a power meter or spectrum analyzer to the crossguide coupler at the output of the system after removing the detector and attenuator.

To adjust the phase combining, unmute all amplifiers and, using the FPRC-1200, set HPA 1 as the standby amplifier. With a CW signal applied to the input of the system, vary phase adjuster (PA2) to peak the power reading on the power meter or spectrum analyzer or the FPRC-1200 controller’s output power display.

With HPA 2 and 3 power combined, phase adjuster (PA2) will be used to maximize the output power. Next, select HPA 2 as the standby. This combines HPA 1 and HPA 3. Use phase adjuster (PA1) to optimize power.

It may be necessary to repeat the steps above to verify the power with all HPA combinations. Choose the best compromise in power for all combinations so that if switch over on fault does occur there is no noticeable increase or decrease in output power.

After phase combining is complete use the locking nut on each phase adjuster to secure the adjustment knob so no accidental changes to the combining occur.

Before placing the system back in operation, replace the cover to the Signal Box.

Figure 8-11: 1:2 Fixed Phase Combined Compact Outdoor System

Operations Manual, HPA2, Compact Outdoor SSPA

205486 REV F

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Paradise 205486 REV F manual Output Power Adjustment, 11 12 Fixed Phase Combined Compact Outdoor System
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205486 REV F specifications

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