u. The ARTIFICIAL ANGLE VOLTS can be used to reference a previous setting
of the azimuth or elevation antennas (this procedure will be necessary in
cursor alignments). To reference a previous setting of the azimuth antenna
proceed as follows:
(1) Place the ART EL-OPERATE-ART AZ Switch S-401 on the navigation
computer chassis alternately between the ART AZ and OPERATE positions (see
figure 21). Observe the position of the sweep trace on the azimuth portion
of the CRT presentation when the switch is in each position (ART AZ and
OPERATE).
(2) Rotate the ARTIFICIAL ANGLE VOLTS Control R-402 on the navigational
computer chassis (see figure 21) until the ART AZ sweep trace superimposes
the OPERATE sweep trace (sweep trace in azimuth presentation is in the same
position when ART EL-OPERATE-ART AZ Switch S-401 is in ART AZ or OPERATE
positions).
(3) Connect multimeter between the ANGLE VOLTS OUTPUT Test Point TP-405
and the GROUND Test Point TP-419 on the navigational computer chassis (see
figure 21).
(4) Place the ART EL-OPERATE-ART AZ Switch S-401 on navigational
computer chassis to the ART AZ position (see figure 21). Observe and record
the voltage shown on the meter.
(5) You now have recorded the artificial angle voltage (AZ) for an
azimuth antenna setting of 5 degrees positive. If it is necessary for you
to refer to the 5 degrees azimuth setting after the azimuth antenna has been
repositioned, simply connect the multimeter as in subparagraph (3) above,
place the ART EL-OPERATE-ART AZ S-401 to ART AZ and rotate the ARTIFICIAL
ANGLE VOLTS Control R-402 until meter reads the voltage you recorded for a
5-degree positive angle (see subparagraph (4) above).
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