Signal Scope for FM-DX-Webserver

Signal Scope is a modern RF signal and audio modulation meter plugin for FM-DX-Webserver.

It combines broadcast-style metering, stereo/RDS indicators and customizable visual themes into a lightweight native-looking plugin.

Features

• Real-time RF signal meter
• Real-time audio modulation meter
• Peak hold indicators
• Stereo / Mono / RDS / CLIP LEDs
• Smooth LED fade animations
• Multiple meter styles
• Theme system
• Optional glass panel effect
• Optional live meter value text
• Optional Activity Strip visualization
• CRT-inspired visual atmosphere
• Scanline and phosphor effects
• Stereo/RDS shimmer effect
• Weak signal RF sparkles
• Native FM-DX-Webserver visual integration
• Compact and lightweight
• Mobile friendly
• Mini / Normal / XL panel sizes
• Settings popup UI
• Update notification support

Meter Styles

• Classic
• Segmented
• LED
• Thin
• Neon

Themes

• Webserver Theme
• Matrix Green
• DX Green
• Amber Orange
• Arctic Cyan
• Nightwish Purple
• Crazy Citrus

Installation

1. Download the latest release ZIP
2. Extract the SignalScope folder
3. Copy the folder into your FM-DX-Webserver plugins directory
4. Restart FM-DX-Webserver
5. Enable the plugin from Plugin Management

Settings

Signal Scope includes a built-in settings popup accessible from the gear icon.

Current settings:

• Theme selection
• Meter style selection
• Glow intensity
• Peak Hold speed
• Value text
• Activity Strip
• Glass panel mode
• Panel size

Settings are stored locally in browser localStorage.

LocalStorage Keys

SIGNAL_SCOPE_THEME
SIGNAL_SCOPE_METER_STYLE
SIGNAL_SCOPE_GLOW
SIGNAL_SCOPE_GLASS
SIGNAL_SCOPE_SIZE
SIGNAL_SCOPE_PEAK_DECAY
SIGNAL_SCOPE_VALUE_TEXT
SIGNAL_SCOPE_ACTIVITY_STRIP

Example:

localStorage.setItem('SIGNAL_SCOPE_THEME', 'matrixGreen');
localStorage.setItem('SIGNAL_SCOPE_METER_STYLE', 'neon');
location.reload();

Supported Themes

webserver
matrixGreen
dxGreen
amberOrange
arcticCyan
nightwishPurple
crazyCitrus

Supported Meter Styles

classic
segmented
led
thin
neon

What's New

v0.6.0

This release introduces the new Activity Strip system and major visual atmosphere enhancements inspired by broadcast instrumentation and CRT-style signal monitoring.

New:

• Activity Strip visualization
• CRT-style atmospheric rendering
• Ultra subtle scanline overlay
• Phosphor persistence glow
• Stereo/RDS shimmer effect
• Weak signal RF sparkle effects
• Audio peak pulse response
• Dynamic movement based on signal conditions
• Activity Strip settings toggle

Improved:

• Neon meter appearance
• Mobile Safari rendering
• Glow rendering consistency
• Meter animation smoothness
• Broadcast-style visual depth
• Overall UI polish and visual atmosphere

v0.5.4

This release focuses on UI polish, mobile refinement and overall visual consistency.

Changes: • New optional value text display • Cleaner and calmer settings UI • Improved mini/mobile layout • Refined glass panel appearance • Better meter spacing and alignment • Smoother LED fade behavior • Internal cleanup and polish

v0.5.3

• Glow intensity modes
• Peak Hold speed control
• Glass panel mode
• Mini / Normal / XL panel sizes
• Smooth LED fade animations
• Improved settings panel UI
• Neon and segmented meter improvements
• Better theme transitions
• Enhanced visual polish

Improved:

• Meter rendering performance
• Peak hold visibility
• Theme persistence
• Responsive layout handling

Roadmap

v0.6.x

• DX Storm visual mode
• Optional analog CRT drift
• Optional spectrum pulse effects
• Vertical compact mode
• Advanced shimmer profiles

Future Ideas

• Vertical mode
• Retro tuner skin
• Analog needle mode
• Oscilloscope waveform mode
• Stereo image meter
• RF turbulence visualization
• Broadcast rack mode

Credits

Special thanks to the FM-DX-Webserver community for ideas, testing and feedback.

License

MIT License

Author

Janne Heinikangas / JanneDX Developed in Finland 🇫🇮

GitHub: https://github.com/fmatic/SignalScope