Paradise 205486 REV F - Manual (Page 101)

Operations Manual, HPA2, Compact Outdoor SSPA 208495 REV C 101
You may alternately use the FPRC-1100 controller’s output power display (available by
pressing the Main Menu key; select 5.Options and press the Enter key; select 6.More and
press the Enter key; select 5.SSPA and press the Enter key; select 3.View and press the
Enter key. The System Forward RF Output Power is shown in the upper right of the display).
Remove the cover from the Signal Box and loosen the
locking nut on the phase adjuster (7/16”) and slowly rotate
the knob clockwise. See Figure 9-8. Continue to rotate
the knob until the output power is peaked.
For optimum performance across the entire frequency
range of the SSPA system, choose another frequency
near each band edge and repeat the steps above. It may
be necessary to find the best compromise in output power
for broadband use.
The BUCs are outside the phase combined loop. Therefore, replacing a BUC will not impact
the phase combining of the system, and no adjustment of the phase shifter is necessary.
Once the phase adjustments are complete, tighten the locking nut on the phase adjustment
knob and securely fasten the cover back on to the Signal Box.
9.4 1:2 Fixed Phase Combined Systems
The 1:2 Fixed Phase Combined Redundant System is a popular system architecture that
enables Solid State Power Amplifiers to achieve higher output power levels while building in
full-power redundancy. The basic system topology is similar to a 1:2 redundant system and is
shown in Figure 9-9.
In this system, amplifiers #1 and #3 are normally online. The outputs of #1 and #3 are
directed by the waveguide switches into a fixed phase combiner such as a waveguide “magic
tee” style combiner. In the event of a failure of either on line amplifier, the standby amplifier,
#2, can be switched in place of either #1 or #3 and the system maintains full output power.
Figure 9-9: Block Diagram, 1:2 Fixed Phase Combined System
Figure 9-8: Phase adjuster