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BENDIX/KING
KN 63
the location and altitude of the ground transmitter, transmitter power output, and the degree of
maintenance of the ground facility. The distance measured by the KN 63 is slant-range distance
(measured on a slant from aircraft to ground station) and should not be confused with actual
ground distance. The difference between ground distance and slant-range distance is smallest at
low altitude and long range. These differences may differ considerably when in close proximity to
a VOR/DME facility. However, if the range is three times the altitude or greater, this error is neg-
ligible. In order to obtain accurate ground speed and time-to-station, the aircraft must be tracking
directly to or from the station.
When operating dual KN 63's, the respective DME's will interfere with each other when the NAV
frequencies differ by 5.3 MHz (for example, 108.00 MHz and 113.3 MHz). This interference re-
sults in premature flags or loss of "lock-on". Should this occur, one of the KN 63's should be either
turned off or tuned to a different NAV frequency so that the 5.3 MHz difference is eliminated.
FIGURE 3-1 KDI 572 WITH LABEL
Rev 4, October/2004
00176I04.TDC
Page 3-2
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