AR 10013164, Руководство по эксплуатации и обслуживанию

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Rev J 37
Appendix A: Guidance for Orienting Stalk Type
Field Probes
It is always best to maintain alignment of one axis of a Field Probe with the E-field being measured. For a
stalk type Field Probe, this can be accomplished by using the axis labels on the orange ball of the sensor head.
The tips of each of the three dipole antennas are indicated with an X, Y, or Z. Using the provided angle
mount at the base of the Field Probe makes alignment of each axis straight forward (See Figure A-1).
Additionally, it is recommended that one of the off-axis antennas be positioned both orthogonally to the E-
field and orthogonally to the direction of propagation, while the other off-axis antenna be aligned with the
direction of propagation. This is achieved by pivoting the Field Probe 45° from the direction of propagation
(See Figure A-2). Using this mounting configuration allows the Field Probe to be easily re-positioned when
changes in antenna polarization occur. For example, if the X axis is aligned with a vertical E-field and the
transmitting antenna polarization is then changed to horizontal, re-aligning the X axis with the E-field is as
simple as loosening the thumb screw on the angle mount and rotating the probe 120° about the axis of the
stalk.
Figure A-1.
Figure A-2.