UHF Radio Control Panel (AN/ARC-164)
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Left console, lower mid-section — directly beneath the VHF/UHF (ARC-210) radio control panel.
Provides manual and preset frequency control for UHF communication, allowing secure voice communication between aircraft and ground control. The pilot can switch channels, test display functions, set guard frequencies, and adjust volume or squelch.
Frequency Display (Green LED) — Indicates active operating frequency or channel information (e.g., 277.625 MHz).
Channel Display (Green LED) — Displays the selected channel number (1–20).
TEST DISPLAY Button — Momentary pushbutton that activates the display test function, illuminating all digits and indicators.
STATUS Indicator — Displays UHF radio operational status (e.g., ON, FAIL).
MODE Selector (A / M / 1 / 2 / 3) — Rotary selector for preset group selection or channel bank.
OFF: Power off
MAIN: Primary radio only
BOTH: Transmit/receive both main and guard frequencies
ADF: Enables Automatic Direction Finder mode for navigation
PRESENT: Uses selected channel preset
MNL: Manual frequency tuning
GRD: Guards emergency frequency (243 MHz)
TONE Switch (T / OFF) — Enables sidetone during transmission for headset feedback.
SQUELCH Switch (ON / OFF) — Toggles audio squelch circuit to suppress static.
VOLUME Knob (VOL) — Rotary potentiometer controlling audio output level.
PRESET CHANNEL Selector (CHAN) — Rotary switch selecting channel 1–20 for preset frequencies.
3 × 4-position (MODE, MAIN/BOTH/ADF, PRESENT/MNL/GRD)
1 × 20-position or encoder for channel selection
Potentiometer: 1 × 10 kΩ linear for volume control
Pushbuttons: 1 × momentary (TEST DISPLAY)
Toggle switches: 2 × ON-OFF (TONE, SQUELCH)
Displays (optional): 2 × 7-segment LED displays or LCD for frequency/channel simulation
3 mm matte black acrylic faceplate, engraved white text, green backlighting.
Knobs 12–15 mm diameter for ergonomics.
Position “TONE” and “SQUELCH” toggles symmetrically under the volume knob.
Green LED backlighting for all engraved text.
Optional amber indicator for STATUS light.
This panel simulates the AN/ARC-164(V) UHF radio used in the A-10C.
In DCS-BIOS, frequency and channel selection can be controlled using encoder inputs for precise tuning.
For realism, map PRESENT/MNL/GRD and MAIN/BOTH/ADF to dedicated rotary switches.
Include hardware debouncing for the TEST button to avoid repeated trigger events.