Squelch, Gain & Filters

Squelch & Gain

• Squelch — a single threshold (3–25 dB) applying globally; there’s no per-channel squelch setting.
• Gain — tick Auto to let the hardware set its own gain (this one applies on Start), or untick it to set a manual level yourself.
• Auto-lock noise ×N — once a channel has been rejected as non-voice this many times, it goes on the session’s temporary lockouts (see Auto-Lockout & Managing Lockouts).
• ● Record — saves a WAV file per transmission, to the folder set on the Recordings tab.

Filters

• Voice detection — when on, the scanner only stops on genuine speech, skipping birdies, data carriers, and plain noise. Its Sensitivity slider trades strictness (fewer false stops, might miss weak voice) against looseness (catches all voice, might grab some noise).
• Voice — an audio-shaping filter tuned to the voice frequency band, separate from the detection above.
• NR (noise reduction) with a strength slider — gentle settings sound more natural, aggressive settings cut more hiss but can sound processed.
• Volume — the level of the profile you’re listening to.
• Hold (s) — how long to stay parked on a channel after the signal drops before resuming the sweep (0.5 to 10 seconds).
• Max hold (s) — a hard cap on how long the scanner will ever stay on one channel, regardless of Hold.

All of these apply live while scanning — no need to stop and restart after changing them.