TB 9-4920-460-24
CALIBRATION PROCESS
6. Preliminary Instructions
a. The instructions outlined in paragraphs 6 and 7 are preparatory to the calibration
process. Personnel should become familiar with the entire bulletin before beginning the
calibration.
b. Items of equipment used in this procedure are referenced within the text by common
name as listed in table 2.
c. Unless otherwise specified, verify the result of each test and, whenever the test
requirement is not met, take corrective action before continuing with the calibration.
Adjustments required to calibrate the TI are included in this procedure. Additional
maintenance information is contained in the manufacturers' manuals for this TI.
d. Unless otherwise specified, all controls and control settings refer to the TI.
e. Throughout this procedure hard keys will be denoted in bold font and soft keys will
be in [brackets].
7. Equipment Setup
HIGH VOLTAGE is used or exposed during the performance of
this calibration.
DEATH ON CONTACT may result if
personnel fail to observe safety precautions.
REDUCE
OUTPUT(S) to minimum after each step within the
performance check where applicable.
a. Set TI front panel switches to the following positions before each test, unless
otherwise instructed:
Position
Function/Rotary Switch
AUDIO LEVEL
Centered
DC
Centered, LED off
MB NAV ID
Centered
DELETE 90/30 150/9960
Centered
ILS/VOR VAR
Centered
TONES
400/OM
ILS/VOR Rotary
OC/0
PRESET KEYBOARD ENTRY
KEYBOARD ENTRY
FREQ HI MID LO
LO
FUNCTION Rotary
LOC