Display Brightness Adjustment; Internal Eeprom And Remote Configuration Module; Gas Discharge Display; Built In Test Equipment (Bite) - Honeywell BENDIX KING KT 73 Installation Manual

Preliminary - Subject To Change Without Notice
BENDIX/KING

DISPLAY BRIGHTNESS ADJUSTMENT:

(a) The display brightness is adjustable in the TEST mode.
(b) Eight carets are provided below the alpha-numeric display characters to indicate
the brightness setting (relative to the photocell reading).
(c) Maximum brightness is indicated by all 8 carets being illuminated.
(d) Minimum brightness is indicated by no carets being illuminated.
(e) The factory default setting is indicated by 4 carets being illuminated.
(f) To adjust the display brightness, place the unit into TEST mode and rotate knob
either clockwise or counterclockwise to adjust the brightness up or down, respec-
tively.

INTERNAL EEPROM AND REMOTE CONFIGURATION MODULE:

(a) The KT 73 has the capability to utilize a configuration module if installed.
(b) The presence of the external configuration module is indicated by + 5 volts being
present on Pin 2 of connector JKT73-2.

GAS DISCHARGE DISPLAY:

(a) The brightness of the display is determined by the photocell relative to the pro-
grammed brightness level.
(b) The illuminance is a function of the PHOTO_CEL voltage provided to the microcon-
troller from the photocell.
When going from bright to dim, an approximate 6 ± 0.5 second time constant is
(c)
used.
(d) When going from bright to dim, 63% of the change will take place in each time con-
stant period.
3.3.3

BUILT IN TEST EQUIPMENT (BITE)

FAULT ANNUNCIATION:
Built In Test Equipment (BITE) failure parameters are monitored by a time averaging process to
ensure that transient events, typical of the aircraft environment, are not the cause of fault annun-
ciation.
The following list the fault annunciation parameters during STANDBY, GROUND, ON, and ALTI-
TUDE modes.
Critical faults are defined as faults that may cause the transponder to behave in an undetermined
manner. The following are critical and non-critical faults.
Rev 0, October/2002
NOTE:
The KT 73 will accept altitude from a Gillham source
between the range of -1000 ft. to 62749 ft. The KT
73 will accept altitude from an ARINC/GAMA 429 or
RS-232 source in the range of -1025 ft. to 62749 ft.
All other altitude values are considered invalid.
10563I00.JA
KT 73
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