Bird Technologies APM-16 - Manual (Page 25)

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Chapter 4 Operating Instructions
Normal Operation
1. Insert the element in the line section socket.
2. To measure forward power, turn the element so that the arrow points
towards the load.
3. To measure reflected power, turn the element so that the arrow points
towards the source.
4. Turn on the RF source.
5. Read the power using the scale whose full-scale marking matches the ele-
ment’s maximum power.
Figure 7 Element Direction
For your convenience, a pair of VSWR conversion graphs are included in this
manual. With these charts, VSWR can be determined from the forward and
reflected power. Find the intersection of the forward and reflected power mea-
surements. The slanted line passing closest to this point is the VSWR.
WARNING
RF voltage may be present in element socket. Keep element in socket during
operation.