B ATCRBS TRANSPONDER KT 76C
Rev 3, May 2004 IM 006-10545-0003.dwd Page 3-5
(1) Place the unit in Standby
(2) Enter in the desired VFR code with the ident code pushbutton switches.
(3) Depress the “VFR” pushbutton while holding the “IDT” pushbutton in its
depressed position.
NOTE
Pressing and holding the “VFR” Pushbutton for two
seconds will retrieve the last non-VFR 4096 code.
FIGURE 3-7 VFR
D. REPLY
The reply indicator, "R", is illuminated for 750 msec +/- 100 msec when the
transponder is replying to a valid interrogation and during the 18 ± 2 seconds
following the initiation of an Ident.
E. ALTITUDE DISPLAY
The KT 76C displays the Flight Level altitude on the left side of the display.
The display is in hundreds of feet. “FL” is annunciated to indicate Flight Level
altitude. Flight Level is a term to indicate that the altitude is not true altitude,
but barometric altitude which is not corrected for local pressure. For Example,
“FL 040" corresponds to an altitude of 4000 feet, meaning sea level pressure
of 29.92 inches of mercury.
The Flight Level altitude is only displayed when the altitude reporting is en-
abled, i.e. in Altitude mode. The altitude range is -1000 to 62,700 feet. If an
invalid code from the altimeter is detected dashes will appear in the altitude
window. Altitude reporting is disabled if the altitude window is blank or has
dashes (see Figure 3-8).
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