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n
(b)
Rev. 0, Aug/2006
©Honeywell International Inc. Do not print without express permission of Honeywell
The errors at the 90 degree, 180 degree, and 270 degree
points should be within +/- 5 degrees.
4.
Using the following formulas calculate the Quadrantal Error:
Bearing_45 = Bearing from KTR 2280 when aircraft is turned
45 degrees left of the beacon.
Bearing_135 = Bearing from KTR 2280 when aircraft is turned
135 degrees left of the beacon.
Bearing_225 = Bearing from KTR 2280 when aircraft is turned
225 degrees left of the beacon.
Bearing_315 = Bearing from KTR 2280 when aircraft is turned
315 degrees left of the beacon.
QE_45 = Bearing_45 - 45
QE_135 = Bearing_135 - 135
QE_225 = Bearing_225 - 225
QE_3155 = Bearing_3155 - 315
QE = Average of QE_45, QE_135, QE_225, and QE_315.
Operational Checks
The following operational checks are to verify proper opera-
tion of the ADF function of the KTR 2280 and can be made
with the aircraft in the parking area.
1.
Place the ADF in the ANT mode and tune in several known
stations. Verify that audio reception is satisfactory and that
volume control operation is normal. Verify that the ADF indica-
tor needle is parked at the 90 degree position relative to the
noise of the aircraft. Place the unit in the ADF mode and verify
that the needle points to the station.
2.
Select the BFO function to enter the BFO mode and verify that
the BFO tone is present in the receiver audio (if a keyed CW
station is used the tone heard will be the coded identifier).
KTR 2280 Preliminary H 08/17/06
Page 2-32
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