GARMIN KN62A TSO’d Silver Crown Digital DMEs Instructions
- June 4, 2024
- Garmin
Table of Contents
KN 62A and KN 64
TSO‘ Silver Crown Digital DMEs
Operating the KN 62A and KN 64 DMEs
Operation
Turn on the unit only after engine start-up. Also, turn avionics off prior to
engine shut-down. These simple precautions should be practiced with all
avionics. It will protect the solid-state circuitry from short-duration high
volt-age spikes and extend the operational life of your avionics.
The 3-position function switch determines both the information dis- played and
the channeling source.
Place the function switch on Frequency (FREQ). The unit is chan- neled
internally with its own two concentric frequency selection knobs. The smaller
of the two knobs has an “in” and an “out” position. When in the “in” position,
this smaller knob changes the 0.1 MHz digit (0.0, 0.1, 0.2, etc.).
When pulled “out”, it adds 0.05 MHz to the frequency and tunes in 0.1 MHz
steps (0.05, 0.15, 0.25, etc.). Pushing the smaller knob “in” subtracts 0.05
MHz from the displayed frequency. The outer, larger knob changes the larger
digits (1 MHz, 10 MHz). In FREQ mode, the unit will display dis-
tance and the selected frequency. (See Figure 19.)
Now move the function switch to the Groundspeed/Time-to-Station (GS/T) position. The unit will hold the internally selected frequency and will display distance, groundspeed, and time-to-station. (See Figure 20.)
Rotating the frequency selector will have no effect on the display because the
DME is in “Frequency Hold”. This frequency hold feature in the GS/T mode
prevents accidental rechanneling of the DME when the frequency is not
displayed.
Place the function switch in the Remote* (RMT) position, and your DME will be
channeled when you
Silver Crown Plus Pilot’s Guide
select your NAV frequency on the NAV receiver. Search time is usually about one second. When the unit locks on a ground station, it will display distance, groundspeed, and time-to-station. (See Figure 21.)
Prior to lock on, “dashes” will be displayed. (See Figure 22.)
Note that you may have two frequencies available at all times (one remotely
selected on the NAV receiver and one internally selected with the unit’s
controls).
“Remote channeling requires wiring to the NAV receiver.
Operational Notes
The KN 62A and KN 64 have an audio output for use in identifying the DME
ground station being received. The audio level is preset at the factory, but
may be easily adjusted through the top cover.
The unit electronically converts to distance the elapsed time required for
signals to travel to and from the ground station. This distance is then
indicated in nautical miles on the Distance/ Speed/Time-to-Station display.
This distance commonly referred to as slant range distance, should not be
confused with actual along-the-ground distance. The difference between actual
ground distance and slant range is least at low altitude and/or long range. If
the range is three times the altitude or greater, error is negligible.
The effective range of DME depends on many factors, most important being the
altitude of the aircraft. Other contributing factors are the location and
elevation of the station, DME transmitter power output, and receiver
sensitivity.
The groundspeed feature incorporated in the unit measures the rate of change
in DME slant range distance with time. This speed is then read from 0 to 999
knots in 1-knot increments. To obtain accurate groundspeed, the air- craft
must be tracking directly to or from the station. To obtain accurate time to
Station, the aircraft must be tracking directly to the station.
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