Left console, below the Intercom panel and just above the KY-58/secure comms area.
Routes antennas and time-of-day synchronization for radios: selects which IFF antenna is used, chooses SATCOM antenna gain, and tells the EGI which radio (ARC-210 or ARC-164) provides Have Quick (HQ) Time-Of-Day.
IFF ANT UPPER / BOTH / LOWER — 3-position selector for the IFF transponder antenna routing.
SAT ANT HIGH / LOW — 2-position toggle selecting SATCOM antenna gain.
EGI HQ TOD: ARC-210 / OFF / ARC-164 — 3-position selector that assigns the radio used for HQ TOD (or disables it).
Recommended hardware (simpit)
IFF ANT: 1 × 3-position switch (use ON-ON-ON toggle or a 3-pos rotary).
SAT ANT: 1 × 2-position ON-ON toggle.
EGI HQ TOD: 1 × 3-position switch (ON-OFF-ON works well in DCS-BIOS for three discrete states).
3 mm matte-black acrylic faceplate with engraved legends.
Center-to-center spacing ~18 mm between toggles; use miniature toggles to match the compact real panel.
Green backlight behind legends (shared light rail with adjacent comms panels).
Notes (DCS-BIOS) Map each switch to its discrete control. For 3-position toggles with a floating middle (OFF), define two inputs (up/down) or use an ON-OFF-ON wired to two separate pins so each extreme is readable at startup. Add 0.1 µF caps or software debounce if needed.