IFF (Identification Friend or Foe) Control Panel
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Left console, below the Yaw & Pitch SAS / Takeoff Trim Panel.
Allows the pilot to manage the IFF transponder system, ensuring secure identification of the aircraft to friendly radar systems. Provides control over transmission modes, encryption, testing, and audio monitoring.
CODE Selector (ZERO / B / A / HOLD) — Four-position rotary switch used to select encryption codes or zeroize (erase) all IFF crypto data.
REPLY Indicator (Green) — Illuminated light indicating a valid IFF response transmission.
TEST Indicator (Green) — Illuminated light confirming system self-test status.
OFF: System disabled.
STBY: Power applied but no transmission.
NORM: Standard IFF operation.
EMER: Emergency squawk for distress identification.
AUDIO OUT Jack — Allows headset monitoring of IFF signal tones.
LIGHT Switch (ON / OFF) — Enables or disables panel lighting.
MODE Selector Knobs (1, 2, 3/A, C) — Four two-position toggle switches controlling specific IFF modes used for various interrogations.
MODE 3/A Code Wheels (Four-digit) — Rotating thumb wheels used to set Mode 3/A identification code (0000–7777).
RAD TEST Button — Momentary pushbutton to initiate radio signal test.
IDENT Button — Momentary pushbutton that forces an identification pulse reply to friendly radar systems.
MIC Jack — Allows connection to aircraft comm system for direct voice identification or IFF audio monitoring.
1 × 4-position for CODE selector.
1 × 4-position for MASTER mode.
Toggles: 4 × 2-position ON-OFF for Modes 1, 2, 3/A, and C.
Pushbuttons: 2 × momentary (normally open) for RAD TEST and IDENT.
Indicators: 2 × 5 mm green LEDs (REPLY, TEST).
Rotary encoders or thumbwheel switches: 4 × digit wheels or 4 rotary encoders for Mode 3/A code.
3 mm engraved black acrylic faceplate with white legends.
Optional secondary mounting plate for encoders and LEDs.
Ensure uniform spacing for toggle rows (min. 12 mm).
Green backlight for labels and legends, with separate illumination for REPLY/TEST indicators.
Optional diffused LED under the MODE 3/A section for clarity.
The IFF panel replicates the AN/APX-113 system used in the A-10C.
For DCS-BIOS implementation, each mode toggle and rotary selector corresponds to discrete commands in the IFF device section.
The ZERO function can be mapped as a protected command to prevent accidental activation.