Panadapter Controls

Panadapter Controls

The panadapter is the main display area showing the FFT spectrum (top) and scrolling waterfall (bottom).

Layout

• FFT spectrum — real-time frequency vs. signal strength
• Frequency scale — between FFT and waterfall, shows MHz
• Waterfall — scrolling time vs. frequency heatmap
• dBm scale — right edge of FFT, draggable
• Time scale — right edge of waterfall, shows elapsed seconds
• Band plan — bottom 8px of FFT, color-coded ARRL sub-bands

Mouse Controls

Action	FFT Area	Waterfall Area	Frequency Scale
Single click + drag	Pan display	Pan display	Zoom bandwidth
Double-click	Tune to frequency	Tune to frequency	—
Scroll wheel	Tune by step size	Tune by step size	—
Right-click	Context menu (Add TNF, Close Slice)	Context menu	—

FFT/Waterfall Split

Click and drag the divider bar between the FFT and waterfall to resize. The split ratio persists across sessions.

dBm Scale (Right Edge of FFT)

• Drag the scale strip up/down to shift the reference level
• Click arrows (▲▼) at the top to step the scale
• The scale uses adaptive 1-2-5 step labels

Display Settings (Left Sidebar → Display)

Control	What it does
AVG	FFT averaging depth (0-100). Higher = smoother trace
FPS	FFT frame rate (5-30)
Fill	FFT fill opacity (0-100) + color picker
Weighted Average	On/Off — uses weighted averaging algorithm
Gain	Waterfall color intensity
Black	Waterfall noise floor threshold (higher = darker noise)
Auto	Auto black level from native waterfall tiles
Rate	Waterfall tile delivery rate (1-30)

Band Plan Overlay

The bottom 8px of the FFT shows ARRL band allocations:

• Blue — CW
• Red — Data/Digital
• Orange — Phone/SSB
• Cyan — Beacons
• White dots — spot frequencies (QRP calling, SSTV, etc.) — hover for tooltip

License class brightness: Extra (dim) → General (medium) → Technician (bright)

Off-Screen VFO Indicator

When you pan the display so the VFO frequency is off-screen, a two-line label appears showing:

• Slice letter + TX status + chevron direction
• VFO frequency

Double-click the indicator to recenter on the VFO.