4.10
KN 62A DIS TANCE MEA SURING EQUIP MENT (DME)
The KN 62A front panel con trols con sist of an ON-OFF switch, a
func tion switch, and fre quency se lec tion knobs. The func tion
switch de ter mines both the in for ma tion dis played and the chan nel -
ing source for the KN 62A. In Re mote (RMT) mode, the KN 62A
is chan neled from an ex ter nal con trol head, and the dis play shows
range, speed, and time-to-sta tion. In Fre quency (FREQ) mode, the
KN 62A is chan neled from its own fre quency se lec tion knobs, and
the dis play shows range and fre quency. In Ground Speed/Time-to-
Sta tion (GS/T) mode the KN 62A holds the last in ter nally se lected
fre quency and dis plays range, speed, and time-to-sta tion.
The fre quency hold fea ture in GS/T mode is nec es sary to pre vent
ac ci den tal rechanneling of the DME when fre quency is not be ing
dis played. To pre vent the unit from dis play ing false in for ma tion,
the KN 62A will dis play dashes and stay in “ search” when ever
power is turned on or mo men tarily in ter rupted in GS/T mode. Nor -
mal op er a tion is re-es tab lished by switch ing to FREQ or RMT
mode.
When the KN 62A is locked to a ground sta tion, range is dis played
to the near est 0.1 nau ti cal mile from 0 to 99.9 nau ti cal miles and to
the near est 1 nau ti cal mile from 100 to 389 nau ti cal miles. Ground
speed is dis played to the near est knot from 0 to 999 knots.
Time-to-sta tion is dis played to the near est min ute from 0 to 99
min utes. When the KN 62A is in search mode, dashes are dis -
played in stead of range, speed, and time-to-sta tion. An au to matic
dim ming cir cuit ad justs the bright ness of the dis play to com pen sate
for changes in am bi ent light level. The dim ming is con trolled by a
photocell mounted be hind the front panel to the left of the dis play.
The au dio out put of the KN 62A can be set as high as l5 milliwatts
into 600 ohms us ing the au dio level ad just ment ac ces si ble through
the top cover. It is set for ap prox i mately 2mW out put at the fac -
tory. It is de sir able to use the au dio to iden tify the DME ground
sta tions be ing re ceived.
SCHWEIZER MODEL 269C-1 HELICOPTER
CSP-C1-1A
FAA Approved: 03 Oct 1995
25
Revised: 17 Apr 1996
