The Bendix KT 76 C Transponder has one knob and eleven butoons.

clicking and display areas

1 to 8. ATCRBS Code Selector Knobs

9. Clear button

10. VFR Button

11 and 12. Function Selector Knob

13. Ident Pushbutton

A. Ident Push button

B. Encoding Altimeter Altitude Window

C. Mode Annunciation and Reply Indicator

D. Ident Window

Operation

We describe below the operation of the KT 76C. The display is emulated but, in FS9, the gauge always works in the same manner. What you see in the display are the screens you see in the real KT 70

IDENT Button

Marked IDT, the KT 76C Ident button is pressed when ATC requests an “Ident” or “Squawk Ident” from your aircraft. When the Ident button is pressed, the reply indicator, an “R” annunciator light will glow for approximately 18 seconds.

ID Code

The ATCRBS Transponder Identification code (squawk code) for the aircraft is displayed in the Ident Window on the right side of the display. Each of the four Transponder Code Selector Knobs selects a separate digit of the identification code.

Reply

The lighted “R” reply indicator blinks when the transponder is replying to a valid interrogation and illuminates for 18 seconds after the initiation of the Ident.

Altitude Display

The KT 76C display Flight Level Altitude, marked by the letters “FL” and a number in hundreds of feet, on the left side of the display (A). For example, the reading “FL 071” corresponds to an altitude of 7,100 feet.

VFR

Pressing the VFR Pushbutton recalls the preprogrammed VFR code, superseding whatever code was previously entered.

Function Selector Knob

The Function Selector Knob on the right side of the KT 76C enables you to choose from among the following operating modes:

OFF - The unit is not receiving power.

SBY (STANDBY) - In Standby the unit is energized but is inhibited from replying to any interrogation. “SBY” is shown on the display, while the altitude display is disabled.

TST (TEST) - Replies are disabled in test mode, and the unit illuminates all segments of the display for at least four seconds. A series of internal tests is performed to check the KT 76C integrity, verifying all EEPROM data and making hardware and squitter checks.

ON - The KT 76C is able to reply to all valid Mode A, C and S interrogations. However, the altitude information will not be transmitted. In the ON mode, the altitude window is left blank, the ID code is shown on the right and the “ON” annunciation is shown on the display.

ALT - In the “ALTITUDE” mode, the KT 76C replies to all valid Mode A, C and S interrogations. The ID code is displayed in the right window and altitude information (in hundreds of feet) is shown on the left.